198 BULLETIN OF THE 



due to difference in age, or whether they denote specific diversity, cannot be 

 determined until more mature specimens are obtained from the Atlantic. In 

 the smallest of the " Albatross " specimens (which have attained a length of 

 19 mm.) the spines, especially those of the abdomen, are relatively longer than 

 in the adult, though not so long as in the type described by Bate. 



As regards the ophthalmic sinuses and lobes, the genus Eryonicus is like 

 Polycheles (Pentacheles). 



Eryonicus spinulosus, sp. nov. 



In this species the spines of the carapace, instead of being wellnigh limited 

 to nine longitudinal ridges, as in E. cteais, are thickly strewTi over the whole 

 surface. The intervals between the spines give rise to slender hair-like setae. 

 This is the arrangement of the spines of the median carina of the carapace : 



2. 1. 1. 1. 2. 1. 1.— 2. 2. 1. 2. 

 The sublateral carina bears fourteen small spines, the lateral, 



5 — 2 — 13 or 14. 

 The uppermost of the two carinae below the lateral is denticulated anteriorly 

 and armed with a spine at the front end behind the second antenna. The low- 

 est ridge carries twelve spines, which increase slightly in length posteriorly. 

 The rostral spines are very small, but on each side of the rostrum the front 

 margin ot the carapace is produced so as to form a pair of horns over the base 

 of the first pair of antennae. The abdomen is ornamented with seven longi- 

 tudinal rows of spines, one dorsal and median, the others paired and lateral. 

 The lowest of the lateral rows is on the upper part of the pleurae. 



Length, 37 mm. ; carapace, 21 X 17 mm. ; abdomen, 17 mm. 



Station 3403. 384 fathoms. 1 specimen. 



Family GNATHOPHYLLID-ffi. 



Gnathophyllum panamense, sp. nov. 



Closely related to G. elegans of the Mediterranean Sea, but distinguished by 

 a prominent conical protuberance, pigmented with black, on the upper part 

 of the cornea. In G. elegans this tubercle is wanting or reduced to the merest 

 vestige, discernible only by aid of a lens. The rostrum of G. panamense is 

 furnished with seven teeth above, and one below. Color entirely different 

 from that of G. elegans. The ground tint is dark brown, ornamented with a 

 multitude of light blue spots, amongst which are sixteen red spots. Rostrum, 

 eyes, and antennae whitish, flagellum of second antenna orange. The fifth and 

 sixth abdominal segments, the telson, and the swimmerets are also white. Basal 

 joints of second pair of chelipeds violet, the merus, carpus, and fingers whitish, 

 basal part of propodus orange. Third, fourth, and fifth pairs of legs violet. 



Panama, March 12. 1 female ovig. 



G. fasciolatum Stimps., from Australia and Amboyna, agrees closely in 



