PHYLLOPODES CONCHOSTRACÉS 329 
Length of carapace, nearly 
4 lines ; breadth at umbo, ra- 
ther more than 2 lines. 
Hab. Lake Winnipeg, N. 
America (W. Caldwell, Esq.) 
(Mus. Brit.). » 
S. À. Packard, Pre basant Fig. 80. — Cyzicus Caldwelli (Baird) (sec. 
sur la forme des valves, réu-  W. Baird). — a, concha à latere: 
RE Cyzicus Caldwelli A M ni visae ; c, pars valvulae 
(Baird) au (C. mexicanus 
(Claus), ce qui ne pourra être résolu que par une connaissance 
plus complète des caractères essentiels. 
? Cyzicus Dallasi (Baird). 
Fig. 81, a-c. 
Estheria Dallasi Baird W., 7, 30, Tab. 20, fig. 5, a-d; Ihering v., 60, p. 172. 
«Carapace-valves shortiv obovate and flat, upper margin 
from the beaks to two-thirds of its length almost straight ; an- 
terior extremity rather broader than posterior. Beaks promi- 
nent and situated near anterior 
extremity. The shell is of à 
light horny colour and very thin 
and translucent. Ribs elevated, 
smooth and numerous, about 
20 in number. The intermediate 
spaces are concave and are co- 
veredalloverwithrough-looking 
spots of an irregular size and RUN 
: Fig. 81. — Cyzicus Dallasi (Baird) (sec. 
appearance, approaching SOME-  W,. Baird). — a, concha a latere ; 6, 
what in structure to that of  Conchae supra visae; c, pars valvulac 
À concharum. 
brasiliensis. It differs from {hat 
species however in size and in being of a more rounded oval 
shape. 
Hab. Brazil? Tam indebted for this species to Mr. Dallas, who 
found it in a collection of insects chiefly from Brazil. Mus. 
Brit. » 
