19B 
CRUSTACEA. 
wald, and I. capita ^ R2ii\\\iQ,=iappendicidata^ Risso^=/ancco/a<a, Risso, both in 
the Black Sea^ Czerniavski, 1. c. pp. 83, 84. 
TANAIDiE. 
Tanais vittatus, Bathke, from Millport : the anatomy of the 
adult animal and the development of the embryo has been ob- 
served by A. Dohrn, Jen. Z. Nat. v. pp. 293-305, pis. 11 and 12. 
There are points of similarity in the development with that of 
AselluSf of Oniscus, and even of Cuma, but also some important 
differences. The maxillipeds and pereiopods are growing in the 
direction towards the back ; and the pleopods make their appear- 
ance very late. The eyes are formed close to the median line 
of the head, and are stalked. The maxillipeds attain a very 
great development ; but the second maxillie remain rudimentary ; 
hence some difficulties. The branchial appendix is independent 
of the second maxilla in its first appearance, and is moved by a 
peculiar muscular apparatus, somewhat analogous to the gills of 
Cuma. The foliaceous appendages of the embryo of Asellus 
are represented in that of Tanais by conical lateral processes 
between the larval membrane and the hepatic region of the 
embryo, which disappear in the course of development. 
Leptochelia. The pleopods of the anterior pairs have a lateral branch. 
L. edwardsii (Kroyer), Black Sea, described by Ozerniavski, /. c. p. 80. 
Pai'atanais savignyi (Kroyer) described from the Black Sea by the same, 
p. 88 j he admits that it may probably be the female of the preceding. 
^GIDiE. 
Slahherina gracilis (G. 0. Sars), islands of East Friesland, on the strand 
in tidal rills, shortly described by A. Metzger, 1. c. p. 32. 
Ilelhriay gen. nov. [Name twice preoccupied among the Crustacea j see 
Zool. Rec. V. pp. 620, 622.] Near Eurydice, Leach j body elongated, head 
large, prominent j eyes large j six abdominal segments, the last large, tri- 
angular, rounded. Inner antennae shorter, outer long. First pair of feet with a 
feeble hand (chela). H. pontica, sp. n., Ozerniavski, 1 . c. p. 81, pi. 6. figs. 4-6. 
[The description is very imperfect j as the other pairs of thoracic feet are not 
mentioned or figured, its relation to known genera cannot be made out.] 
CyMOTHOIDtE. 
Livoneea taurica, sp. n., Ozerniavski, 1 . c. p. 129, Crimea. 
Bopyrid^. 
F. Muller (Z. c.) distinguishes the following subdivisions in 
this family : — 
1 . Fixed externally on the abdomen or the branchial cavity 
of Decapods ; the young individuals have all the thoracic feet 
similarly formed, and an unequal styliform appendage at the 
hinder extremity. Bopyrus, lone, Phryxus^ Gyge, Athelgus, 
&c., which may all be reunited into one genus. 
