l6o SMITHSONIAN MISCELLANEOUS COLLECTIONS 



It is perhaps specifically the same as the example figured by 

 Adams and White in pi. vi, fig. 2, of the Crustacea of the A'oyage 

 of the Samarang, which is considered by the authors to be the young 

 of their O. reticulatus. 



Found at Loo Choo. 



Genus NURSIA Leach 



260. NURSIA PLICATA^ (Herbst) Bell 



Cancer pUcatus Herbst, Naturg. d. Krabben u. Krebse, in, pi. 59, fig. 2. 



Niirsia hardwickii LEach, Zool. Misc., iii, p. 20. 



Nursia plicata Bell, Lin. Trans., xxi, 307, pi. xxxiv, fig. 4. 



The middle portion of the carapax in our specimens is closely 

 granulated, and sometimes the ridges also. The hand is depressed, 

 and nearly smooth ; the fingers sulcated. In life the color of the 

 carapax above is partly pale brick-red and partly yellowish-white ; 

 the arms are reddish ; the hands pale bufif. 



It was dredg'ed in considerable numbers from shelly bottoms in 

 six to ten fathoms, in the channel of Hongkong Harbor. 



261. NURSILIA DENTATA Bell 



Nursilia dentata Bell, Lin. Trans., xxi, 309, pi. xxxiv, fig. 6. 



In the male specimen taken by us we notice the following charac- 

 ters. The posterior branchial angle and ridge are acutely promi- 

 nent, forming a sharp up-curved tooth at the margin, which is 

 almost as prominent as the lateral tooth anterior to it. The front is 

 broader than in Bell's figure, and the teeth more projecting. Eyes 

 protractile to a considerable length. Antennulae very long, nearly 

 half as long as the carapax ; their fossae very deep. The external 

 maxillipeds are not gaping, as in the female, according to Bell ; the 

 surface of the exognath is granulated ; ischium of endognath with 

 a longitudinal ridge along the middle ; meros excavated. Chelipeds 

 as in the female. Abdominal segments as in Nursia; penult joint 

 with a tooth near its extremity, pointing backward. The abdominal 

 appendages of the first pair are bifurcated at their extremities. 



Color in life white. Dimensions of the carapax : Length, 0.27 ; 

 breadth, 0.29 inch. 



The difference in the outer maxillipeds is so great that were it 

 not for the exact correspondence^ nf some other characters we should 



^ Nursia hardzcickii Leach. 



