117 
not been closely examined). Two specimens are from »lat. 49° 30’ N., long. 142° 8 E., 
Sartung in Sachalin, Andréa, 1869«; they have not been closely examined. One specimen 
is from lat. 51°.N., long. 141° 20’ B., »in sea-weed«, Andréa, 1869«, and in its marsupium 
were found: one female, five males and eight ovisacs (none of them containing developed 
larvee). — In several specimens the marsupium was very much extended by the parasites; 
the hosts were always sterile. 
REMARKS. The female is easily recognised by its hair-covering and its peculiar 
genital area; the male differs from all other species by its crenate frontal margin and by 
the peculiarly dotted surface of the back aud the sides of the trunk. 
With regard to the determination of the host, I will add that I myself was incapable 
of distinguishing the numerous specimens from East Asia from Greenlandish specimens; there- 
fore I sent some of the non-infested Asiatic specimens to Prof. G.O. Sars, who in his new 
important work about the Norwegian Amphipoda, writes on p. 450, that he was unable to 
distinguish them from the Norwegian Call. leviusculus. So it is interesting that I have 
found no parasite in specimens from Greenland, nor in any of the very numerous Danish 
specimens which have been referred to this species, but it must be observed that in Sars’ 
opinion these animals belong to Call. Rathkei (Zadd.), about which, however, Sars himself 
does not seem to be absolutely certain, whether it can be maintained as a species. 
10. Sphzronella irregularis un. sp. 
(Pl. XII, fig. 5 a—5 4.) 
FEMALE. The only specimen found (fig. 5a) was ‘73mm. long and ‘59mm. broad; 
the body is ovate, the head tolerably defined. The sub-median part of the frontal margin 
furnished with a number of moderately long hairs. (The antennule broke off under the 
preparation). The antenne 3-jointed, with a terminal seta (which broke off). The maxillie 
normal. The maxillipeds with all four joints distinctly separated; the basal joint naked, the 
terminal joint with trifid apex. The sub-median skeleton consists of narrow lists, and a 
distinct, centrally uninterrupted, list runs between the head and the trunk; between the 
base of the maxilla and the maxillipeds runs a pretty long transverse stripe of long hairs. 
The lateral margins of the head with a thin row of moderately long hairs. The whole 
surface of the trunk is rather sparingly trimmed with peculiar hairs, which consist of a very 
small but comparatively thick basal part, from which proceed two, sometimes three hairs, of 
which the one proceeding from the centre of the basal part is always much longer than the 
other or the two others. The trunk-legs are distinct. The genital area (fig. 5d) in my 
only specimen is so irregular in shape that it must be misshaped; it is a little narrower 
than the base of the head, most of its median part is thin-skinned, the more solidly chitinised 
part forming a kind of heart-shaped ring with an opening to the front. The genital aper- 
