N'otes on North American Crustacea.' 55 



Pauopeiis texaams, nov. sp. 



Closely allied to P. herlstii, for wliicli it would be taken 

 upon a hasty examination. It exhibits, however, the following 

 distinctive characters, which are found to be constant in twenty 

 or more specimens. The carapax is longer in proportion, and 

 more convex ; and the surface is smooth or less granulous, but 

 generally pubescent. Hiatus of the external angle of the orbit 

 small, being a deep notch or fissure rather than an opening. First 

 and second antero-lateral teeth of very slight prominence. Hands 

 large and smooth in the male, with the dactylus destitute of the 

 strong basal tooth, which is always present in P. herhstii of 

 every age. There is, also, no tooth on the hand between the 

 bases of the fingers. The right hand is always the larger. 

 The fingers of the smaller hand are long and considerably 

 curved. The color of the fingers is always white or very pale 

 brown in the male, the moveable one being generally darker 

 than the other ; — they are sometimes blackish in the female. 

 Ambulatory feet long. The abdomen of the male is rather 

 broad and convex, with the terminal joint transverse and 

 broader than the penult ; — thus showing a marked difierence 

 from that of P. herhstii. The dimensions of carap. of $ are, — 

 length, 0'T6 ; breadth, 0-97 inch. Dimensions of carapax of 

 P. herhstii $ ; — length, 0-90 ; breadth, 1*25 in. 



Found at St. Joseph's Island, Texas, by Gustavus Wurde- 

 mann, Esq. 



Panopeus liarri§ii. 



Pilumnus Harrisii^ Gould ; Inv. Mass. 326. 



This species is smaller than P. herhstii. The carapax is 

 more quadrilateral, and the upper surface transversely ridged 

 or lineated. An important character is found in the canalicu- 

 lated edge of the front, which thus seems bimarginate. The 



