ASTACIDiE. 79 



Lake Champlain, and from the Aquarial Gardens in Boston (locality 

 uncertain, bnt perhaps from the Northern Lakes), which belong un- 

 doubtedly to C. pusillus ; still the differences given by Mr. Girard are 

 not sufficient for separating C. pusillus from C. Bartonii. 



The type of C. longulus is, as I think, merely an accidental variety of 

 C. Bartonii The fingers are cylindrical, very widely separated at the 

 base, and bearded in this place and inside of the external finger, along 

 the basal half. The shape of the finger is unusual and, I think, acci- 

 dental. Broadly separated fingers are sometimes seen ; the Museum 

 possesses a specimen having the fingers on the right hand separated 

 and those on the left hand contiguous ; but I have never seen the space 

 between the fingers bearded with hairs. The other differences quoted 

 by Mr. Girard, and taken from the shape of the rostrum and the breadth 

 of the areola, are not important enough to warrant a specific separation. 



Mr. Say, Journ. Acad. Philad., T. 1. p. 443, says : " A. Bartonii has the 

 hands differently proportioned with respect to the thumb, and more 

 or less muricated. They are extremely common in the pine barren 

 marshes of the Southern States, and particularly in those of Georgia 

 and Florida." I have not seen specimens from there, but they perhaps 

 belong to A. latimanus. 



Cat. No. 1847, Aquarial Garden, Boston, L. Agassiz. Male Form I. 

 and II. Fern. Spec. 12 * 



Cat. No. 284, Berkshire, Tioga County, N. Y., L. Agassiz. Male 

 Form I. and II. Fern. Spec. 12* 



Cat. No. 278, Schooley's Mount, N. Y., Mr. A. Mayor. Male. Fern., 

 young. Spec. 8. 



Cat, No. 290, Elizabethtown, N. Y., Professor Baird. Male Form II. 

 Fern. Spec. 3. 



Cat. No. 231, Lake Champlain, Professor Baird. Fern. Spec. 1. 



Cat. No. 227, New Jersey, L. Agassiz. Male Form I. and II. Fem. 

 Spec. 12* 



Cat. No. 235, Schuylkill River, Penn., L. Agassiz. Male. Fem. Spec. 

 12* 



Cat. No. 238, Philadelphia, Penn., Dr. Leidy. Male Form I. and II. 

 Fem. Spec. 12* 



Cat. No. 244, Lake Superior, L. Agassiz. Male Form II. Fem. 

 Spec. 12* 



Cat. No. 243, Cincinnati, Ohio. Male Form II. Fem. Spec. 3. 



Cat. No. 267, Cincinnati, Ohio. Male Form II. Fem. Spec. 3. 



Cat. No. 288, Cincinnati, Ohio, L. Agassiz. Male. Fem., young. 

 Spec. 12 * 



Cat. No. 295, Scioto River, Columbia, Ohio, Mr. J. Sullivan. Male 

 Form II. Fem. Spec. 6. 



Cat. No. 286, Mammoth Cave, Kentucky. Fem. Spec. 1. 



