6 PROCEEDINGS OF THE NATIONAL MUSEUM. - VOL. XXXIV. 
The chief character of this genus is furnished by the development — 
of the fourth pair of pleopods of the male (Plate I, fig. 11). 
Here it is the znner ramus (1. e., the one that carries a lobe-like proc- 
ess at the base) which is elongated beyond the outer one, while in 
all other genera with a tendency to increase the length of a branch of 
this appendage, it is always the outer branch that surpasses the inner. 
In shape, this elongated inner branch resembles to a degree that of the 
outer branch of M/ysidopsis and Mysideis, being somewhat an exag- 
geration of the structure found in these two genera. 
In the form of the antennal scale (Plate I, fig. 2) Holmesiella 
differs from all related genera (Leptomysis, Mysidopsis, Mysideis), 
and rather recalls Callomysis, or the genera of the H'rythrops group. 
The shape of the telson does not differ much from the types known 
among the typical group of the Leptomysine. In all other respects, 
it possesses nothing that varies considerably from the characters as- 
signed to the subfamily Leptomysine. 
Type of the genus.—Holmesiella anomala. 
HOLMESIELLA ANOMALA Ortmann, new species. 
Plate I, figs. 1-18. 
Station No. 4192.12 young (male and female) (cotypes).—Gult 
of Georgia, off Nanaimo, Vancouver Island, 89-97 fathoms. 
Station No, 4251.—5 female adults (cotypes).—Stephens Passage, 
south of Juneau, 198 fathoms. 
Station No. 4257.—1 male adult, type Cat. No. 31494, U.S.N.M.— 
Vicinity of Funter Bay, Lynn Canal (north of Juneau), 350 fathoms 
(estimated). | 
Station No. 4264.—2 female adults, cotypes Cat. No. 31492, 
U.S.N.M.—Off Freshwater Bay, Chatham Strait, south of Juneau, 
293-282 fathoms. 
Description of adult male.—Total length of largest specimen (type, 
from Station No. 4257), 37 mm. Body slender, but strong. Cara- 
pace with the frontal part projecting, not pointed, but broadly 
rounded. Hyes comparatively large, cornea globular, dark brown. 
Antennulw (Plate I, fig. 1).—Projecting beyond the eyes with the 
terminal joint of the peduncle; first joint subcylindrical, second joint 
very short, terminal joint swollen, thicker than the two preceding 
ones, about as long as thick, with the usual conical process at the 
distal end on the under side. 
Antenne (Plate I, fig. 2)—With the peduncle shorter than that 
of the antennule. Antennal scale large, projecting far beyond the 
peduncle of the antennul, lanceolate, margins almost parallel in the 
middle part; outer margin almost straight, without sete, terminating 
in a strong spine a short distance from the tip. Tip and inner margin 
setose. 
