PRINTED FOR THE SOCIETY BY D. HEARTT,

And sold by THOMAS DOBSON & SON, No. 41 South Second Street,
and CALEB RICHARDSON, No. 1 North Fourth Street›

1817.

CONTENTS

OF

VOLUME I.-PART I.

INTRODUCTION.

Page i

Description of six new species of the genus FIROLA, observed

by Messrs. Le Sueur and Péron in the Mediterranean Sea,

in the months of March and April, 1809. By C. A.

Le Sueur.

3

Account of a North American Quadruped, supposed to be-

long to the genus Ovis. By G. Ord.

Descriptions of seven species of American Fresh-water and
Land Shells, not noticed in the systems. By Thomas Say.

The same, concluded.

Descriptions of several new species of North American In-

sects. By Thomas Say.

Observations on the genus ERIOGONUM, and the Natural Order

POLYGONEE of Jussieu. By Thomas Nuttall.

Notice of the late Dr. Waterhouse, *6.4

Observations on the genus ERIOGONUM, &c. concluded.

Characters of a new Genus, and descriptions of three new Spe-

cies upon which it is formed; discovered in the Atlantic

ocean, in the months of March and April, 1816; lat. 22° 9′.

By C. A. Le Sueur.

Description of three new species of the genus RAJA. By C. A.

Le Sueur.

Some Account of the Insect known by the name of Hessian Fly,

and of a parasitic Insect that feeds on it. By Thomas Say.

On a new genus of the CRUSTACEA, and the species in which

it is established. By Thomas Say.

13

17

19

24

31

33

An Account of an American species of the genus TANTALUS
or IBIS. By George Ord.

An Account of the CRUSTACEA of the United States. By

Thomas Say.

An Account of the CRUSTACEA of the United States, continued.

53

57

65