REPORT ON THE PYCNOGONIDA. 



79 



atively strong : it is not denticulated on the inner surface but slightly serrated. The joints 

 of the ovigerous legs are almost quite smooth. The shape of the denticulate spines is 

 very curious. They are broad and flat, have two or three stronger teeth on each side 

 near the base, and extremely fine teeth all over the rest. 



The very smooth legs are comparatively long. The first and the third joints are short and 

 almost of equal length, the second joint is more than twice as long, having a large oval 

 genital opening at the extremity on the ventral surface. The fourth joint, containing the 

 ovary, is considerably swollen and very long ; the fifth is only a little shorter, the sixth, 

 on the contrary, is a little longer. The two tarsal joints are very small, together about one- 

 fifth of the length of the sixth joint. Almost every joint describes a feeble but character- 

 istic curve ; especially the second, the fourth and the eighth joint. The first tarsal joint 

 is extremely small, and is furnished with a large number of hairs and an isolated stronger 

 spine, the second tarsal joint also shows a number of hairs and four stronger spines 

 opposite to the claw. The claw is strong and very long, considerably curved, and with- 

 out auxiliary claws. 



The only specimen of this species dredged during the cruise of H.M.S. Challenger 

 is a female, which, I think, is a full-grown one. 



Habitat. — This species, along with a specimen of Pallene australiensis, Hoek, was 

 collected at Station 162. April 2, 1874. Off East Moncoeur Islaijd, Bass Strait. Depth 

 of the sea, 38 to 40 fathoms. Bottom of the sea, sand. 



Observations. — This very characteristic species may be easdy recognised among the 

 different species of Pallene by the form of the proboscis and cephalothoracic segment, by 

 the shape of the denticulate spines of the ovigerous legs, by the presence of a claw at the 

 end of the ovigerous leg, and finally by the absence of auxiliary claws at the end of 

 the legs. 



Pallene languida, n. sp. (PI. XII. figs. 1-5). 



Diagnosis. — Body highly concentrated, rather disciform. Proboscis conical, 

 cephalothoracic segment comparatively long. Ovigerous legs with denticulated spines, 

 but without a claw. Legs without auxiliary claws. Oculiferous tubercle conical, elevated. 

 Rudiments of palpi in the form of knobs. 



Description. — 



Length of the proboscis, 

 Length of the trunk, 

 Total length of the body, 

 Length of the ovigerous leg, 

 Length of the leg of tlie third jjair. 



0'45 mm. 

 1-35 „ 

 1-8 „ 

 2-3 „ 

 5-1 „ 



Of this curious species, unfortunately, only a single specimen was collected, and this 

 specimen had, moreover, sufiered much from the alcohol ; it is visibly crumpled,^especially 



