CarPENTER—Pycnogonida from Torres Straits. 23 
Pallenopsis. Hoekii (Miers). 
Ble tesees, 1, 
Phoxichilidium Hoekii, Miers (11), p. 324, Pl. xxxv. B. 
_ A single male was taken by Professor Haddon. Three males 
represented the species in the “Alert” collections obtained at 
depths from 4 to 17 fathoms, and all from various localities to the 
north of Australia. I give a figure of the terminal joints of 
a false leg, as in Miers’ plate there is only a slightly magnified 
sketch of this appendage. 
Family.—COLLOSENDEID 2. 
Hoek’s name for this family seems to me preferable to that 
adopted by Sars, which is derived from Goodsir’s obscure genus 
Pasithoe. 
Genus.—RHoPALORHYNCHUsS, Wood-Mason. 
This genus was founded by Wood-Mason (12) in 1873 for a 
species (&. Kréyeri) from Port Blair, Andaman Islands (25 fms.). 
Although Hoek (1) and Schimkéwitsch (7) consider that it should 
be sunk as a synonym of Collosendeis, Jarz., I venture to think that 
it may with advantage be revived for the reception, in addition to 
its type species, of Collosendeis tenuissima, Hasw. (4), from Port 
Denison, Queensland, and the new species from Torres Straits 
about to be described. It may be distinguished from Collosendeis 
by the elongation of the second and third trunk-segments, the 
extreme attenuation of the body, the slender stalk of the club- 
shaped proboscis, the excessive reduction of the caudal segment,} 
and the simple nature of the spines on the false legs. Moreover, 
the species of Codlosendeis (in its restricted sense) seem character- 
istic of Arctic and Antarctic seas, and a depth of over 100 fathoms, 
whilst the species of Rhopalorhynchus are rather tropical and lit- 
toral. I feel, however, that the two genera are so closely allied 
that the discovery of species intermediate between them, which 
would necessitate their union, may be a very likely event. 
1 Haswell evidently saw and figured it in his species, though he wrote in the descrip- 
tion that it had been lost. 
