56 
T. Y. HODGSON. 
(<tOj-(e .24 
especially so. The propoclus is very slightly curved and covered ventrally with 
short spinous setse, with, proximally, a row of four stout spines. Dorsally the set-se 
are small and scanty. The terminal claw is large, more than half the length of 
the joint, and accompanied by two small auxiliaries. These claws arise on a process 
from the oblique termination of the joint. The extreme end does not project much 
beyond, and is supplied with numerous spinous setae. The rest of the limb, coxae, 
femur, and tibiae are fairly well covered with very small setae ; their precise 
distribution is not easy to observe, but they appear to be deficient laterally; they 
are most abundant on the second tibia. The lateral line is well marked on the 
three largest joints. 
The specimen above described is an adult female, and shows conspicuous Genital 
apertures on a swelling at the extremity of the second coxa of all the legs. An 
adult male shows smaller apertures on the three posterior legs only. 
The female was taken in 100 fathoms, rough ground, off the Barrier, in 
Lat. 78° 16' 14" S., Long. 197° 41' 47" E. 
The male was taken in 300 fathoms, mud, off the Barrier, in Lat. 71° 25' 40" S., 
Long. 185° 39'06" E. 
RHYNCIIOTHORAX. 
Rhinchothorax, O. G. Costa, Microdoride Mediterranea (1861), p. 7. 
1 have not seen Costa’s original description of this genus or its attendant species. 
In the ‘Challenger’ Report (14) it is included by Dr. P. P. C. Hoek in his list of 
the then known species of Pycnogonida, and at the same time condemned as being 
insufficiently described. It is not a little remarkable that out of ten species then 
recorded from the Mediterranean only one is described in Dr. Dohrn’s monograph (8). 
Zoologists are indebted to that author for the careful and full descriptions of the 
Pycnogonida therein recorded. The genus and species of Rhinchothorax mediterraneus 
Costa are fully described, and differ in many particulars from the original description. 
Dr. Dohrn states— 
That the Chelifori are absent. 
That the Palp is eight-jointed, but that fusion has taken place, reducing 
the number of distinct joints to five. Five distinct joints are figured, 
the limits of the remainder being obscure. 
That the Ovigers are eleven-jointed. In both figures, however, only ten 
joints are shown. 
I have no hesitation in placing the species described below in the genus Rhyncho- 
thorax as defined by Dr. Dohrn for these reasons: the general aspect of the animal is 
similar; the proboscis is cleft at its extremity ; though the palps are only five-jointed, 
the feebly-developed extremity seems to indicate some reduction is taking place ; and 
the ovigers are ten-jointed, and the exact counterpart of those figured by Dr. Dohrn. 
