G. M. Taoxsox.—On the New Zealand Entomostraca. 257 
1. Philomedes agilis, nov. sp. Fig. 0.8 a-e, and D.1 a- 
Male.—Valves, when viewed from the side, oblong; greatest height about 
two-thirds of the length, obtusely rounded posteriorly, beak not greatly pro- 
duced anteriorly ; superior and inferior margins evenly and slightly arched ; 
oral notch wide, margins more or less setose. When viewed from above the 
valves are narrow, sides nearly parallel, almost truncate posteriorly, tapering 
to an obtuse point in front. Surface marked with numerous circular pits, 
and several translucent spots in the centre of each valve. Behind each 
prominent eye-spot, is a more or less deep transverse sinus or depression, 
extending nearly across the whole valve. Colour of shell yellowish-brown. 
Terminal setz of upper antenne nearly half as long as the antenne itself. 
Natatory branch of inferior antenn:e (exclusive of sets) exceeding in length 
the basal portion, second joint very short, bearing a straight plumose seta, 
equal in length to the third joint, which again is longer than the next six 
joints; terminal sete about as long as the branch itself. Secondary branch 
with the basal joint short and stout, bearing short plumose sete; second 
and third joints subequal, former with two sete in the middle of external 
margin, latter curved, external margin denticulate and with a single seta on 
its inner margin near the base. Last joint of mandibular foot slender, 
twice as long as preceding, terminal claw subequal to it; all the joints 
bearing several plumose sete. “Oviferous feet" terminating in a vermi- 
form toothed extremity, bearing a pair of long spinose sete above and 
three beneath; about five pairs of shorter spinose sete on the annulated 
portion near the extremity. Post-abdominal laminæ terminated by three 
large jointed and doubly-serrated claws,—the first very long, second only 
half as long, and third about half as long as second,—and about five 
smaller spines. Eyes large black. 
Female.—Valves somewhat larger, and much more circular in outline, 
with the beak small and very slightly produced; oral notch nearly rectangu- 
lar; height about three-fourths of the length; easily distinguished externally 
from the male by the small size of the eye-spot. Superior antennz with 
the setze at the extremity of the antepenultimate joint beautifully plumose. 
Natatory branch of the inferior antenna with the first joint very long; all 
the rest short and subequal; no sete on the first three joints, those on the 
fourth, fifth, and sixth joints about as long as the basal joint and bluntly 
toothed ; the remainder (seven in number) very long and densely plumose ; 
— branch rudimentary, with a few small sete. Eyes reddish. 
Length 4', inch ; height . inch 
Swimming actively in ro bols on the Taieri Beach. 
' II. Copepoda 
Shell jointed, fortüing a buckler dina the head and thorax ; legs | 
five pairs, mostly adapted for doped ded external, 
AB 
