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 nm.) 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 Hryonicus 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 H. cecus, are thickly strewn over the whole 
surface. The intervals between the spines give rise to slender hair-like sete. 
This is the arrangement of the spines of the median carina of the carapace : 
2.4 Me Qe dhe 2! 
The sublateral carina bears fourteen small spines, the lateral, 
5— 2 —13 or 14. 
The uppermost of the two carine 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 antennze. 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 pleure. 
Length, 37 mm. ; carapace, 21 X 17 mm.; abdomen, 17 mm. 
Station 3403. 384 fathoms. 1 specimen. 
Family GNATHOPHYLLIDZ. 
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 antenne 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 
