Goree Island, Senegambia. BTS 
three specimens were also observed attached to the dorsal 
surface of the carapace of Lambrus massena, var. atlanticus, 
and Hbalia tuberculata. The valves of the operculum in these 
specimens are of a pinkish or purplish hue in spirit, and lon- 
gitudinally ribbed or folded, the ribs often nearly as promi- 
nent as in B. trigonus; the adductor ridge of the scutum is 
generally very distinct, the tergum has a short and broadly 
truncated spur. 
Intermingled with the above I have found in one or two 
instances young specimens apparently referable to Balanus 
amphitrite, which is mentioned by Mr. Darwin (¢.c. p. 241) 
as occurring on the west coast of Africa and being, in fact, 
common in nearly all the warmer temperate and tropical 
seas ; whereas B. spongicola has, according to Mr. Darwin, a 
more restricted range, occurring on the southern and western 
coasts of Britain, at Madeira, and in the West Indies. 
Geographical Distribution of the Species. 
In order to facilitate reference to the species enumerated in 
the foregoing paper, the following systematic list is given, 
with the geographical range of each, so far as known to me 
at present. Our knowledge of the distribution of the higher 
Crustacea is as yet very imperfect, although the attention of 
earcinologists has been of late years increasingly directed to 
its study. The following list, however, will suffice to show 
the marked affinities of the crustacean fauna of Goree (so far 
as it is represented in the collection now described) with that 
of the Mediterranean and Hastern American coasts, which I 
have already referred to above. Of 55 species or well-marked 
varieties contained in this list, 3 are not included in the Gorean 
collection, and may be dismissed from present consideration. 
Of the remaining 52, 17 have been recorded from the temperate 
European seas ; and of these several are now indicated from one 
or more of the intervening island-groups, ¢. e. the Cape-Verd, 
Canary, and Madeiran Islands; the Huropean aftinity is 
further exhibited by several of the new species having near 
allies in Mediterranean forms. Only five species in the fol- 
lowing list have been recorded from the West Indies or 
localities on the east coast of North America; but several 
others find near allies among their American congeners, e. g. 
Heterocrypta Maltzani, Lophozozymus sexdentatus, Leptodius 
punctatus, Neptunus inequalis, Hthusa mascarone, Roux, 
Spiropagurus elegans, Scyllarus arctus, var. paradoxus, n., 
and Peneus velutinus, Dana. 
Portunus corrugatus, Pennant, Penceus velutinus, Dana, and 
Balanus amphitrite have an Oriental range; and the typical 
Ann. & Mag. N. Hist. Ser. 5. Vol. viii. 26 
