150 Bulletin, Vanderhilt Marine Museum, Vol. Ill 



obliquely excavate for the articulation with the carpus, which is short, 

 bulbous, encupping the base of the propodus ; the latter in the larger 

 chela is 17 mm. long, of which the lower finger is 5 mm. ; the palm is 

 moderately swollen, the hinder end slightly dilated posteriorly; both 

 lateral faces of the palm moderate, convex; the lower finger is the 

 larger, armed with two coarse teeth fitting between the one coarse 

 tooth of the slenderer, curved, hinged finger fits ; the apex of the lower 

 finger is much down-curved. 



The smaller second chela is of similar contour to the larger one, but 

 the hinged finger has one tooth and the lower finger none. 



The three pairs of ambulatories are slender, each with the propodus 

 twice the length of the carpus; the dactyl very rudimentary, with a 

 small curved apex. 



Synonymy. — Pontonia margarita Smith, as footnote in A. E. Vereill, 

 on * ' Parasitic Habits of Crustacea, ' ' American Naturalist, vol. 3, 

 p. 247, 1870. 



Family: HIPPOLYTIDAE. 



Genus: HIPPOLYTE Leach. 

 Hippolyte projecta (Spence Bate). 



Plate 53. 



Type: A single specimen taken by the "Challenger" off Nova 

 Scotia and deposited in the British Museum. 



Distribution : Hitherto known only from the type locality. Range 

 extended to seven miles off Port Basque, Newfoundland, depth 200 

 fathoms, by the ''Ara" specimen. 



Material examined : One specimen dredged in 200 fathoms, 7 miles 

 S. W. by W. of Port Basque, Newfoundland, September 1, 1926, by 

 the ''Ara." 



Technical description: Animal about 30 mm. long, the abdomen 

 angulated at the third and fourth segments. Rostrum two-thirds as 

 long as the carapace, apex directed upward and very acuminate ; lower 

 margin laminate, convex beyond the eye and armed with three coarse, 

 serrate teeth; upper margin crested and armed with five small teeth 

 anteriorly, which are relatively close-set, and behind which there are 

 two coarse and more widely separated teeth, the hinder of which is 

 above the orbit. The rostral carina is continued on the carapace to 

 within a short distance of the posterior margin, the carina bifurcating 

 behind the last tooth; there are six coarse teeth on the carapace, be- 

 sides the above-mentioned two large teeth on the hinder part of the 



