G. M. Tuomsox.—On the New Zealand Copepoda. 97 
(4 to 6 times) longer than broad, about as long as two last abdominal 
segments; outer margin fringed with a row of fine teeth. Innermost tail 
sete considerably longer than abdomen. 
Length -+ of an inch. 
Hab. Tomahawk lagoon, near Dunedin. 
My specimens are rather larger than the European form, but in all 
points of structure agree closely with Dr. Brady's description and figures. 
0.—Anterior antenne 8-jointed, 
4. Cyclops chiltoni, n. sp. Pl. TX., figs. 11-19. 
Cephalothorax narrow-oblong in form, last segment hardly wider than 
abdomen ; first segment three-fifths of the length of the whole; rostrum 
very short. Abdomen slender, subequal with cephalothorax in length, 
segments about as broad as long, surrounded by rings of minute comb-like 
teeth. Anterior antenne three-fourths as long as the first segment of the 
body, rather stout, joints tapering to the extremity, first about four times 
as broad as the last; relative lengths as follows :— 
1 2, 3, 4, 5, 6, 3. 8, 
18. 10, 4.5716. T. 6.0 XL 10.? 
setze tolerably numerous on the first four joints, last joint with 4 (sometimes ` 
5 or 6, some very small) terminal sete. Posterior antenns large ; the long 
seta on the basal joint almost smooth. Mouth organs very small. First 
four pairs of legs with strong spines. Fifth foot very small, 1-jointed (?), 
bearing 8 spines, the lower one of which is plumose. Caudal segments 
about 3 times as long as broad; central caudal sete three-fourths as long 
as abdomen. Length, 4; inch. 
Hab. Numerous specimens obtained in gravel pits at Eyreton, by Mr. 
C. Chilton, after whom I have named it. 
Quite distinct from the two other species characterized by the 8-jointed 
anterior antenns, viz., C. crassicornis, Müller, and C. magniceps, Lilljeborg. 
e.—Anterior antenna. 6-jointed, 
5. Cyclops equoreus, Fischer. Pl. XI., figs. 16-18. 
_ Body gradually attenuated from before backwards. Anterior antenne 
much shorter than first segment of thorax, stout at the base, and only 
slightly tapering towards the apex ; 1st and 2nd joints stout, subequal, 3rd 
short, 4th the longest, 5th short, 6th about twice as long as 5th; the fol- 
lowing represents the relative lengths of the joints in the majority of my 
m = = T 3 A Mandibles dilated at the apex and 
divided into several slender sharp teeth. Maxille strongly toothed. Feet 
of the 1st pair short, and furnished with rather short sete. Fifth feet bear- 
ing a triangular joint, dilated towards the extremity, and furnished with 8 
7 
specimens (females) 
