78 THE VOYAGE OF H.M.S. CHALLENGER. 
des pates-mAchoires trds-renflé, et premier article du thorax extrémement allongé. Pates 
environ cing fois aussi longues que le corps, sans crochets accessoires au bout. Pates 
accessoires de la femelle de dix articles.” However, as in this description the very 
distinct spines on the legs have not been mentioned, which, if present, would certainly 
have been seen by Milne-Edwards, I think it probable that his Pallene chiragra is a 
nearly allied but distinct species. Jarvis Bay, New Holland, where Milne-Edwards’s 
species was collected, is not far from Station 163. 
Pallene levis, n. sp. (Pl. XI. figs. 8-12). 
Diagnosis.—Body robust, lateral processes scarcely separated. Body and legs smooth. 
Proboscis short, conical ; inserted about the front of the cephalothoracic segment. Ovi- 
gerous legs with denticulate spines and a long claw. Legs without auxiliary claws. 
Description.— 
Length of the proboscis, . 5 : : : é : 1 .mm. 
Length of the trunk, ; : ‘ : : 3 2°66 ,, 
Length of the abdomen, : : : . . DONG: 
Total length of the body, . : 3 : 5 , , Cae 
Length of the ovigerous leg, ; A : : ‘ - One a5 
Length of the leg of the third pair, ‘ ¢ : : . PANS a ye re 
The body of this species is robust. The cephalothoracic segment is of a curious 
shape: it is considerably swollen at the front, where it bears the proboscis and the 
mandibles ; it is constricted in the middle, thus forming a sort of short neck, and it is 
much wider again at the back, where it bears dorsally the oculiferous tubercle, and 
ventrally the short lateral processes for the insertion of the ovigerous legs. The 
oculiferous tubercle, with two larger eyes directed forwards and two smaller ones back- 
wards, is situated almost exactly above the insertion of the ovigerous legs. The 
lateral processes for the insertion of the legs are comparatively long; the abdomen is 
short and stout. 
The proboscis is short and conical, and has a very small mouth at the extremity. The 
mandibles are rather stout. The basal joint is constricted at the base, and indistinctly 
divided into two joints, it is nearly as long as the proboscis ; the second joint is placed at 
right angles with the basal joint, and is considerably swollen and stout. At the 
extremity it is furnished with two claws, one straight, pomted and immovable, the other 
curved and movable, but also pointed. The inner surface of these-claws is smooth, but 
there is a blunt point in the middle of the movable claw. 
The ovigerous legs of the female specimen (the only one dredged) are not very 
strong. The first three joints are small, the fourth and the fifth are the longest, nearly 
of the same length and a little curved. The sixth joint is not quite half as long’ as the 
fifth. The four last joints are but little shorter than the sixth. This claw is, compar- 
