THE VAUNTHOMPSONIID® 303 
The minute Cuma pulchella, Sars, has recently been taken 
by Mr. Thomas Scott in the Firth of Forth. 
Cyclaspis, ‘ with orbed carapace,’ contains seven species, 
one of which cornigera, Sars, by the pair of horns on the 
sides at the anterior part of the carapace is a very marked 
form. Cyclaspis levis, G. M. Thomson, and Cyclaspis pusilla, 
Sars, are notable for having the carapace entirely devoid of 
spines and sculpturing. 
Iphinoe trispinosa (Goodsir) is plentiful in some British 
waters. The number of spines or teeth on the central 
crest of the carapace is far from being always limited to 
three. In the males these teeth are always set away from 
the front of the carapace, and sometimes in that sex there 
are none, though it is doubtful whether this is so frequently 
the case that it can be called the rule. Iphince tenella, 
Sars, has recently been taken in the Clyde. 
Cumopsis contains two species which are both British, 
one, Cumopsis Hdwardsii (Spence Bate), which was placed 
successively in Cuma, Vaunthompsonia, and Bodotria, till 
Sars established a new genus for it, and the other, Cumop- 
sis longipes (Dohrn), the specific name of which has 
priority over levis given by Sars. 
Family 2.—Vaunthompsoniude. 
General form, first antenne and mandibles, pleopods 
and absence of telson, are as in the Cumide. ‘The flagel- 
lum of the second antenne in the male is composed of 
long slender joints. ‘The epipod of the first maxillipeds 
in the female is very narrow, with few, finger-like bran- 
chial sacs arranged in a semicircle. The third maxillipeds 
have the joints scarcely expanded. ‘The first three pairs 
of perzeopods in the female and the first four in the male 
have well-developed swimming-branches. ‘The inner branch 
of the uropods is two-jointed. 
There are at present three genera. 
Vaunthompsonia, Spence Bate, 1858, has the body not 
very slender, scarcely compressed ; the eye distinct; the 
second joint of the third maxillipeds not produced; the 
