REPORT ON THE PYCNOGONIDA. 39 



The ovigerous leg of the full-grown female is almost entirely straight. The difference 

 in length between the fourth and the fifth joints is not so considerable as in the males ; 

 the denticulated spines on the four last joints are more numerous than in the males, 

 their numbers being 19, 12, 10, 9. These curiously-shaped knobs do not occur on the 

 ovigerous leg of the female. 



The legs are still longer than those of Nym'phon hanuitum. In a female of 

 12 mm. they measured 46 mm. ; in a male of 9^, 38 mm. (1 : 3-8 and 1 : 4). The 

 second joint is in the males four times as long as the first, in the females a little 

 shorter, but considerably swollen at the extremity ; the sixth joint is the longest, being 

 more than once and a half the length of the fifth ; the first tarsal joint is shorter than 

 the second, the claw is almost as long as the first tarsal joint, auxiliary claws are 

 wanting (PI. II. fig. 5). The first joints of the legs are almost entirely smooth, the 

 hairs increasing in number as they approach the extremity of the leg. The genital 

 openings of the females are very large, and are found on every leg. Those of the 

 males are smaller, and found only on the three hinder pairs of legs (PI. XV. fig. 9). 

 The colour of alcoholic specimens is light yellowish. (For the larvae see below.) 



Habitat. — This fine species was dredged east of Auckland. There are in all twelve 

 specimens, of which only three are females. One of the males was furnished with larvae 

 clinging to the accessory legs. The depth at which the specimens were found is 1100 

 fathoms. At the same place two specimens oi Nymphon compactum, Hoek, were obtained. 



Station 168. July 8, 1874. Lat. 40° 28' S., long. 177° 43' E. Depth, 1100 

 fathoms. Bottom temperature, 2"0°C. Sea bottom, grey ooze. 



Observations. — I believe this species with its rudimentary eyes to form the transition 

 from the shallow-water species to the true deep-sea species. The very long coxae render 

 the species easily distinguishable. 



Nymphon procerum, n. sp. (PL II. figs. 9-12). 



Diagnosis. — Body extremely slender, smooth ; legs hairy ; eyes obsolete ; auxiliary 

 claws wanting ; the second joint of the palpi a little longer than the third, the second 

 joint of the leg longer than the first and the third, the second tarsal joint of the leg a 

 little longer than the first. 



Description. — The body is very slender, and the lateral processes are separated by large 

 intervals. The proboscis is slender, shorter than one-third of the length of the body, in 

 the middle a little thicker. The cephalothoracic segment is longer than the proboscis. 

 Eyes are wanting ; the abdomen is small and bent upwards. The mandibles are very 

 long, the basal joint longer than the rostrum, the second joint also long and slender, the 

 claws very long ; the spines of the movable claw are smaller, and closer to one another 

 than are those of the immovable one (PI. II. fig. 10). The palpi are very slender, much 

 longer than the rostrum ; the second joint is a little longer than the third ; the fourth and 



VVOODS 



