Goree Island, Senegambia. 371 
species from the Cape of Good Hope. Stalio, while retaining 
Dr. Heller’s designation of C. hirtipes for the Adriatic speci- 
mens, 1s yet of opinion that Hurydice Swainsonii may be 
their proper designation, and C. hirtipes be a distinct yet 
allied species. That C. hirtipes is distinct is, I think, certain, 
since in Milne-Edwards’s figure the body is represented as 
longer and narrower, the terminal segment less acute, and the 
uropoda subequal and of a more acute and narrow lanceo- 
late shape; moreover, in specimens referred, I think rightly, 
to C. hirtipes in the British-Museum collection, the interan- 
tennal process of the epistome is narrower and the median 
frontal lobe more distinct and prominent. 
In all its characters C. Swainsonii much more nearly ap- 
proaches C. Cranchii of Leach; and the two species may even 
be identical; but more specimens of C. Cranchii are needed 
for comparison, and for the present it may suffice to point out 
the affinity and possible identity of the two species. Neither 
the degree of granulation of the eyes nor the number of ex- 
posed postabdominal segments are characters of importance, 
since I have seen specimens of C. Cranchii having the 
eyes nearly smooth and but five postabdominal segments ex- 
posed; there are, however, slight differences in the form of the 
uropoda and terminal segment. 
AMPHIPODA. 
Ampelisca tenuicornis, Lilljeborg. 
Here are referred with little hesitation two Amphipods in 
somewhat imperfect condition in the collection which agree in 
all essential characters with A. Boeck’s diagnosis of the 
species **, who, moreover, quotes as synonymous with the 
Arctic form the Araneops diadema of Costa from the Gulf of 
Naplest. I have thought it well, however, to subjoin the 
following detailed description of the Gorean specimens :— 
The body is compressed and dorsally arcuated, without 
spines or tubercles ; the head projects somewhat beyond the 
anteriorly-porrected coxa of the first thoracic segment, is 
nearly twice as long as its greatest vertical depth, and its 
antero-lateral margins are slightly sinuated. Segments of 
the postabdomen smooth; the first has its postero-lateral 
angles rather broadly rounded; in the third postabdominal 
segment this angle is nearly a right angle; the fourth seg- 
* De Skandinaviske og Arktiske Amfipoder, ii. p. 519, pl. xxxi. fig. 1 
1876). 
‘ + Mem. R. Accad. Sci. Napoli, p. 178, pl. i. fig. 1 (1856). 
