78 
In recent years the species has, as far as I can see, only been 
mentioned by the following authors. Norman 1907 (Ann. Mag. Nat. 
Hist. ser. 7, vol. 20, p. 369) quotes it without any commentary 
from Guernsey. Walker 1914 (ibid. ser. 8, vol. 13, p. 560) men- 
tions it from Tobermary Harbour (Hebrides), and Shoemaker 1920 
(p. 22) describes the from Alaska. — 
H. J. Hansen 1897 (The Choniostomatidæ, pp. 113—114)men- 
tions the species from Cuba and Hong-Kong. These specimens 
were originally determined by Stebbing who 1906 (Amphip., Tier- 
reich, p. 692) refers them to C. acherusicum. They are still in the 
possession of our Zool. Mus.; revising the material I have been 
unable to find any difference between these and typical specimens 
from Northern Europe. So it is to be taken for rather granted 
that the original labels containing the localities are wrong: for it 
is not probable that the species has so wide a distribution. 
Distribution. From Norway to the Channel; Alaska. Other 
localities must be accepted with due caution. — “Both on the south 
and west coasts of Norway, at least to the Trondhjemsfjord, and 
is generally found in depths varying from 6—10 fathoms“. (Sars 
1895). — Denmark, see above. — Tobermary Harbour (Hebrides), 
“depth at low tide abt. 3 feet“ (Walker 1. c. 1914). — Guernsey 
(Norman l.c. 1907).— Grantley harbour (port Clarence), West Alaska 
abt. 65® N (Shoemaker 1. c. 1920). — Cuba??; Hong-Kong?? 
(see above). — Milne-Edwards had no locality for the type-spe- 
cimens. 
Corophium acherusicum A. Costa. 
On the literature. Costa 1851 (in F. W. Hope: Catal. 
Crosr. Ital., p. 24; I have not had access to this paper) has only 
nornen nudum (Audouinia acherusica). Costa 1854(?) (p. 232) gives 
only a very short and rather inadequate description without figures. 
Heller 1867 (Denkschr. K. Akad. Wiss. Wien, Math.-Naturwiss. Cl., 
Bd. 26, p. 51, PI. 4 fig. 14) gives the first true description accom- 
panied by a single figure (head with ant., $ ?). 
Della Valle 1893 (p. 364, PI. 1, fig. 11, PI. 8, figs. 17, 18, 20 
—41) gives the first adequate description of both sexes, with a 
number of figures. Later on it is mentioned by several authors 
(Sowinsky: Mern. Soc. Kiew. vol. 15, 1898, p. 455 [Russian]; Chev- 
reux: 1900, p. 109; Stebbing: Tierreich 1906, pp. 692, 740; Chev- 
