2 PROCEEDINGS OF THE NATIONAL MUSEUM. VOL, XXXIV. 
The present specimen agrees well with the one mentioned by the 
writer among the Hawaiian Schizopods. Its length (difficult to 
measure, since the specimen is. doubled up) is about 55 mm. It 
differs from the typical (adult) Gnathophausia gigas in the stronger 
development of the branchiostegal, infero-lateral, and postero-dorsal 
spines; the branchiostegal spines are even stronger than in the Ha- 
wallan specimen. Besides, the supraocular is distinctly larger than 
the antennal. The outer margin of the antennal scale has five distinct 
teeth, while the type has only four, and the Hawaiian specimen has 
also four, of which the last one is very small. The rostrum is longer 
than in the Hawaiian individual; in the present specimen the part 
in front of the ocular spines is distinctly longer than the rest of the 
-arapace, including the posterior spine, while in the one from Hawan 
it is about as long as the rest of the carapace without the posterior 
spine. All these minor differences apparently are due to age. 
Family MYSID Dana. 
Subfamily LHPTOMYSIN 4: Norman, 1892. 
The division of the family Myside into subfamilies seems quite 
necessary on account of the large number of genera of very various 
type contained in it. The subfamilies created by Norman “ are chiefly 
framed with reference to the British forms, and thus it is some- 
times hard to assign foreign genera and species to their proper place. 
According to Norman,® the following features are characteristic 
for this subfamily: 
Outer uropods one-jointed, thew outer margin setose. Gnathopods 
(= second maxillipeds or second cermopods) conforming in general 
character of the endopodite to the maxillipeds (= first maxillipeds 
or first cormopods). First true legs (= third cormopods) similar to 
the following in general character, and not very greatly developed 
and larger than the latter. Male with all pleopods greatly developed 
and adapted for swimming, second to fifth pair biramose, all branches 
multiarticulate and setose, the outer branch of fourth, and sometimes 
also of third modified for sexual purposes, but the modification only 
extending to a slight lengthening of the limb and a change in the 
character of the setw of the terminal joints. 
This diagnosis does not exactly apply to some forms, not treated 
by Norman, which'clearly ought to be placed here, while it apparently 
fits others, which are more widely different in other characters. 
Boreomysis G. O. Sars,’ for instance, although answering fairly 
well to the above diagnosis, differs at once in the presence of seven 
WINN, INGUts ISHS (Bo OS; I> yo, Ye 
>’ Monogr. Mysid., III, 1879, p. 8, 
