JVotes on JVorth Americaji Crustacea. 63 



near the sea. There are specimens in the Smithsonian Museum 

 from Mexico, Texas, Florida, South Carolina and Virginia, and 

 its range extends northward to the south side of Cape Cod. 



Gela§ifii&us stsbcyliBidrictis, nov. sp. 



A species of Gelasimus found at Mataraoras, on the Rio 

 Grande, several specimens of which were collected by M. Ber- 

 landier, and deposited in the Smithsonian Institution by Lieut. 

 Couch, shows a close affinity with G. pugilator in most of its 

 characters, but differs so much in its proportions that it will 

 probably prove distinct. The carapax is much broader, shorter, 

 and more convex than in the pugilator, and the branchial 

 reirions are more inflated. 



CrelasiBiatis panaiiaeiisis, nov. sp. 



Of this species there are three specimens only in our pos- 

 session, all of which are apparently immature. In the largest, 

 a male, the carapax measures 0"35 inch in length, and 0*52 in 

 breadth. The front is prominent but broad, and rounded below 

 as in G. pugilator. The carapax is broad and full behind ; and 

 the margins are sufficiently distinct nearly to the posterior 

 extremities, but are marked by raised lines onl_y on the anterior 

 half The slight oblique or curved ridge at the posterior 

 extremity of the lateral margin is prominent, but short. The 

 exterior angle of the orbit is acutely prominent, so that the 

 upper margin of the orbit is sinuous. Immediately behind this 

 angle the lateral margin is straight, or slightly concave. The 

 adult character of the great cheliped cannot be determined 

 from so small a specimen, but the large hand in the young is 

 smooth or slightly granulous above, and convex and unarmed 

 within. 



Found at Panama by Mr. Sternbergh. 



