PYCNOGONIDA. 
9 
completely covered with stiff setse, largest distally. The propodus is curved, with a 
very distinct swelling ventrally at the proximal end ; this swelling bears half-a-dozen 
strong spines, the rest of the ventral surface being occupied by a band of stout spinous 
setse about half the size of the proximal group. Dorsally the setse are fewer and 
weaker, a narrow space appears devoid of them laterally. The terminal claw is long 
and slender, about two-thirds the length of the propodus, to which it is articulated at 
the ventral angle. There are no auxiliaries, and the projecting heel is small. 
The Genital apertures of the male occur on the second coxse of the two posterior 
pairs of legs; in the female they occur on all the legs, on a conspicuous swelling of 
the coxa. 
The adult male bearing ova, described above, was taken in Winter Quarters in 
125 fathoms, on a bottom of small stones and organic debris (June 6, 1903). A 
smaller specimen, taken at the same time and place, is rather severely mutilated, having 
lost one of its ovigers and four legs. Its sex is indeterminable, but it is probably 
immature. The first segment of the trunk is distinct; the others can be traced, but 
with difficulty. The limbs are much more spinose than in my type ; everywhere the 
tubercular enlargements from which the stiff setse arise are more abundant, especially 
on the first coxa and the femur. The oviger also is very different. The first three 
joints are small, the third having an oblique termination which involves half its length ; 
the fourth is as long as the two preceding, the fifth a trifle longer; the sixth is very 
short, and the seventh scarcely twice as long. Of the three terminals the middle one 
is the shortest, the other two being subequal in length. From the sixth each successive 
joint becomes more slender. The entire appendage is completely devoid of setse, but 
on the inner margin of the seventh joint are three curved spines; on the eighth joint 
there are two, and on the terminal one there are six, one of them occupying the position 
of the terminal claw. An adult female was taken in 41 fms. (Jan. 30, 1903). The 
femora contain ripe ova and are swollen in consequence. The setse are generally 
finer than those of the male. The oviger, too, resembles that of the male. The 
denticulate spines are fairly well preserved, and under a high power (JV obj.) show a 
short shaft with three small, but strong, teeth. Then follows a flattened ovoid blade 
with a minutely toothed margin, the teeth of which are of a totally different character 
to those on the shaft. On the terminal joint these spines are more curved than 
elsewhere and the terminal claw does not exist, its place being taken by a much worn 
example of the denticulate spines. Another occurs more dorsally, but is broken off in 
this specimen. 
I believe I am correct in identifying these specimens with the P. cornigera of 
Professor Mobius and with the Cordylocliele turqueti of Professor Bouvier. Though I 
have seen both species, I must admit that I have not examined them with that care that 
the fact of a second closely allied species having been found demands. 
The essential difference between the ‘ Discovery ’ and the ‘Valdivia’ specimens 
occurs in the length of the legs, which are half as long again in the latter specimens. 
N 2 
i <3/4 J3 / 
p-y 
