SULCATOR. 
187 
AMPHIPODA. 
NAT ATOM A 
PHOXIDES. 
Genus— SULCATOR. 
Sulcaior. Spence Bate, Ann. Nat. Hist. vol. xiii. p. 504, 1854 ; xix. 
p. 140. Rep. Brit. Assoc. 1855, p. 58. Cat. Amph. Brit. 
Mus. p. 112. White, Hist. Brit. Crust, p. 174. Hosse, 
Marine Zool. p. 142. 
Bellia. Spence Bate, Ann. Nat. Hist. vol. vii. p. 318, 1851. 
Generic character. Cephalon anteriorly produced. Gnatho- 
poda small, imperfectly subchelate. Pereiopoda having the 
dactyla obsolete, most of the joints squamously developed. 
The head is developed anteriorly, and produced cen- 
trally to a point. The body of the animal is much 
distended, the centre, however, not being materially 
wider than the other portions. The third segment of 
the tail is remarkably long, and has the lateral walls 
considerably developed, so that the three posterior seg- 
ments of the tail, together with their appendages, lie 
folded within it, seldom appearing extended. 
The eyes are small. The superior antennae are fur- 
nished with a secondary appendage. The coxae are 
large. The arms are feeble and imperfectly subche- 
late. The walking legs have all the joints developed in 
the form of large plate-like scales, except the fingers, 
which are represented by a few stout spines. The last 
pair of caudal appendages are double-branched, and the 
central tail-piece is single, but cleft. 
This genus bears a near resemblance to that described 
by Say, under the name of Lepidactylis , in the iS Pro- 
ceedings of the Academy of Philadelphia,” vol. i. p. 2. 
