CYAMUS OVALIS. 91 
AMPHIPODA., CYAMID. 
ABERRANTIA. 
LY —s 
me 
wT] WW) Moe 
Sp ar LZ/, 
yaa f é 


CYAMUS OVALIS., 
Specific character. Body depressed, elliptic-ovate, with the segments not 
gaping apart at the sides. Third and fourth segments of body, with two pairs 
of branchiz on each side, of unequal length; those of the third segment 
having at the base only a short slender appendage, those of the fourth seg- 
ment having two appendages of unequal size at the base. Hand of the 
second pair of legs with two obtuse teeth. 
Length about half an inch. 
Cyamus ovalis. RousseL DE VAuzEME. Ann. Sci. Nat. 2nd ser. vol. i 
p. 259, pl. 8, fig. 1-21. Miune Epwarps, Hist. N. 
Crust. tii. p. 118. Ann. Sci. Nat. 2nd ser. iii. pl. 14, 
g. 13, 14. Reégne An. ed. Crochard Crust. pl. 63, 
fig. 3. Guerin, Icon. R. An. Crust. pl. xxviii. fig. 4. 
Waitt, Pop. Hist. Brit. Crust. p. 219. Cat. Brit. 
Crust,, p. 62. Gossr, Marine Zool. i. p. 31. Spence 
Barr, Cat. Amph. Brit. Mus. p. 367, pl. lviii. fig. 3. 
Ann. Nat. Hist. (Feb. 1857), 2nd ser. xix. p. 152. 
THIS species is indicated as British by Mr. Adam 
White in his *‘ Catalogue of the British Crustacea,” but 
we have seen no specimen which we are able to identify 
with M. Roussel de Vauzeme’s figures, which we have 
consequently been under the necessity of copying in the 
accompanying woodcut.* This species is at once distin- 
guished from C. ceti by its elliptic-ovate form, by the 
* The figure on the right hand represents the male, seen on its ventral 
surface, whilst the left-hand figure represents the under surface of the body 
of the female, showing the incubatory pouch. 
