Glacial Markings of Unusual Forms in the Laurentian Hills1883 |
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Page 182
... cusp of the rhachidian tooth very long , the middle side cusps small , and the lateral cusps larger ; uncini long and pointed . Type . PURPURA PERSICA , Linné . Subgenus PURPURELLA Dall , 1872 . Shell oblong - oval , whorls covered by ...
... cusp of the rhachidian tooth very long , the middle side cusps small , and the lateral cusps larger ; uncini long and pointed . Type . PURPURA PERSICA , Linné . Subgenus PURPURELLA Dall , 1872 . Shell oblong - oval , whorls covered by ...
Page 171
... cusps of the teeth are higher than the base . When the teeth are very transparent , it will be found . necessary to ... cusps , and great care should be used in describ- ing and sketching these . In describing the teeth , we use a dental ...
... cusps of the teeth are higher than the base . When the teeth are very transparent , it will be found . necessary to ... cusps , and great care should be used in describ- ing and sketching these . In describing the teeth , we use a dental ...
Page 172
... cusps as a denominator . In the example given , the uncini are long and prong - like and the cusp number is omitted . This is the case with all the Muricida . Care- ful drawings should always be made of both teeth and cusps , as well as ...
... cusps as a denominator . In the example given , the uncini are long and prong - like and the cusp number is omitted . This is the case with all the Muricida . Care- ful drawings should always be made of both teeth and cusps , as well as ...
Page 173
... cusps generally ; formula as a rule , 1 + 1⁄2 + 1 . SUBFAMILY I. MURICINE . b . Shell with short canal or a simple notch ; whorls ribbed , nodulous , or smooth ; columella broad and flattened ; operculum oblong , with lateral nucleus ...
... cusps generally ; formula as a rule , 1 + 1⁄2 + 1 . SUBFAMILY I. MURICINE . b . Shell with short canal or a simple notch ; whorls ribbed , nodulous , or smooth ; columella broad and flattened ; operculum oblong , with lateral nucleus ...
Page 174
... cusps very large ; base of rhachidian tooth quadrate , uncini with single cusps , long and prong - like . Type . MUREX TENUISPINA , Lam . Subgenus MUREX ( typical ) . Shell more or less pyriform , spinose , with three varices ; whorls ...
... cusps very large ; base of rhachidian tooth quadrate , uncini with single cusps , long and prong - like . Type . MUREX TENUISPINA , Lam . Subgenus MUREX ( typical ) . Shell more or less pyriform , spinose , with three varices ; whorls ...
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abundant Academy of Sciences acid Animal aperture Atwood August Avenue Babcock Banks of streams Bastin Berry Lake Birds Board of Trustees BULLETIN Calumet Region Calumet river Chicago Academy clay color columella County course Curator cusps Dentition Desplaines river Englewood Erian Evanston exhibit feet fields Flora flowers Foraminifera genus Glencoe Gray grounds Hill Hyde Park Illinois inches Industry infrequent or rare insects July July-August June June-July Lake Calumet Lake Michigan lake shore Laurentian Hills lectures lessons Lincoln Park loan collections macrospores material May-June Maywood Michx Miller's mollusks Muhl Museum nature-study nest Niles North Nutt open woods operculum Pine Station plants portion prairies Prof radula Rich woods Riverside Robert Kennicott rock sandy soil schools shales Shell South Chicago southward species specimens sporocarps stars Swamps teachers Term expires January tion Tourn wet places whorls Willd
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