no. 1653. SOME NEW ATLANTIC 1 80 PODS — RICHARDSON. 485 



First pair of legs in male transformed into a sort of operculum, 

 arching over the ventral side of the head and concealing the mouth 

 parts ; they are composed of five articles, the third being the largest. 

 The terminal or fifth article is nearly twice as long as the fourth. 

 The other five pairs of legs are ambulatory. There are no append- 

 ages to the seventh thoracic segment. 



This species is very similar to the type species described by Bed- 

 dard, but differs in the structure of the mandibles, in the additional 

 article to the flagellum of the second antennae, in the longer terminal 

 joint of the first gnathopods, in the differently shaped rostrum, in 

 the absence of the bunch of hairs at the tip of the rostrum, and in 

 having the mandibles fitting closely around the rostrum, not project- 

 ing straight forward at a distance from the rostrum. 



Two fine specimens, both males, are from the following localities : 

 One (type) from Albatross Station 2547, south of Marthas Vine- 

 yard, was taken at a depth of 390 fathoms; another from Albatross 

 Station 2528, east of George's Bank, was taken at a depth of 677 

 fathoms. 



. Type.— Cat. No. 38972, U.S.KM. 



Beddard's species was taken at a depth of 900 fathoms. The divi- 

 sion proposed by Dollfus," in which genera provided with eyes are 

 littoral or do not extend below a depth of 500 fathoms and those de- 

 prived of eyes live at a depth of 1,000 fathoms can not be maintained, 

 for we have now a species belonging to a genus without eyes found 

 at a depth of only 390 fathoms. 



Genus GNATHIA Leach, 1814. 



GNATHIA MULTISPINIS, new species. 



Body ovate ; lateral margins drawn out in small spines ; dorsal 

 surface covered with small spines and tubercles. Legs also covered 

 with small spines. 



Head broader than long, about twice as wide as long; frontal 

 margin not produced in a rostrum, but in a small median point; 

 antero-lateral angles produced in a bifurcated spine ; lateral margins 

 drawn out on either side in spines; dorsal surface covered with 

 small spines and tubercles. Eyes moderately large, composite, and 

 placed on the lateral margins. First pair of antennae with the first- 

 two articles of the peduncle short and subequal; third as long as 

 first two taken together; flagellum composed of four articles, the 

 first very short. Second antenna? with the first two articles of the 

 peduncle short; last two elongated and subequal; flagellum broken 

 at the fourth article. Mandibles projecting a considerable distance 

 in front of the head; broad at base and produced to narrow, acute 

 extremities; on the outer margin, on the posterior half furnished 



« Bull. Soe. Zool. France, XXVI, 1901, pp. 239-240. 



