196 JVotes on North American Crustacea. 



This species, which we regard as the type of the genus, was 

 taken at the Island of St. Thomas, "W. L, bj Mr. Eiise. 



Podocliela inacrodera, nov. sp. 



This species has considerable resemblance to P. grossi^es^ 

 but differs in the following particulars. Rostrum shorter. 

 Meros-joint of external maxillipeds much shorter and broader, 

 with the anterior angles prominent and laminate. Chelipeds 

 with less inflated hands ; fingers neither gaping nor annulated 

 with pink. Ambulatory feet more slender; the penult joint 

 in the first pair especially much longer and more slender, and 

 with no distinct thumb-process on its inferior edge ; hands of 

 the posterior two pairs more pedunculated and less geniculated, 

 the thumb-process being nearer the middle of the penult joint, 

 and thickly setose. Length of the carapax in a male, 0.421 ; 

 posterior breadth, 0.30 inch. 



The specific name is suggested by the great length of the 

 neck, or peduncle of the summit upon which the eyes and 

 antennae are suppoi-ted ; although this is almost equally long 

 in all the other species. 



It was found at St. Thomas, by Mr. Riise, and at Key Bis- 

 cayne, Fla., by G. "Wurderaann, Esq. 



Potlochela riisei, nov. sp. 



PI. II.,. fig. 1. 



Of this species we have but a single example, a female. The carapax 

 is narrow anteriorly, but depressed and broadly expanded posteriorly at 

 the bases of the ambulatory feet. Gastric region very tumid, with a few 

 setigerous tubercles : sette crispate. Cardiac region sharply prominent, 

 tuberculiform. Hepatic region with a strong, deilexed, almost laminiform 

 lateral tooth. Frontal region protuberant, setigerous. Rostrum depressed 

 much below the level of the frontal region, broader than long, nearly 

 horizontal, sub-laminiform, naked, with a slight median carina ; margin 

 regularly arcuated, semicircular, entire. Basal joint of the external 



