338 ANNALS OF THE CARNEGIE MUSEUM. 
3. Subgenus Eurynia (sens. strict.). 
On the edge of the mantle in front of the branchial a long row of quite 
regular, uniform, smaller or larger papillae, reaching to about the middle 
of the lower margin. Inner lamina of inner gills connected with ab- 
dominal sac, but a small hole at the posterior end of the foot is some- 
times left open. Shell of medium size or large, subelliptical, elongated, 
more or less pointed behind. Beak-sculpture sinuated, or double- 
looped, the posterior loop often open behind. 
Type £. recta (Lamarck). 
Eurynia (Carunculina) parva (Barnes). 
Three gravid females, from the outlet of Conneaut Lake in Crawford 
Co., Pennsylvania, are at hand. 
Thee specimens were collected on June 17, 1909, and contained only 
eggs and no glochidia, thus showing that the breeding season must begin 
unusually early. 
The soft parts have been described by Lea (Obs., VII, 1860, p. 221) 
and a figure is given (pl. 29, fig. 102), which shows the shape of the 
“caruncle.’’ Other descriptions 
of the soit parts are those of Call (1895, p. 35) and Simpson (in Baker, 
1898, p. 110). 
As I have previously stated (Ortmann, 19110, p. 314) a very small 
marsupium and the position of the 
supra-anal seems to be present in one of my specimens, while in the 
others it appears entirely closed. No additional material has come 
to hand. The anal is finely crenulated, the branchial has papille. 
In front of the branchial, the inner edge of the mantle carries a group 
of distinct and crowded papille of various sizes (see Ortmann, 1911), 
p. 317) occupying only a short space on the edge of the mantle, which 
further in front is smooth. Palpi connected at base only. 
Diaphragm and gills of usual structure. , Inner lamina of inner gills 
free for more than one-half of the length of the abdominal sac. Mar- 
supium kidney-shaped, occupying about the posterior half of the outer 
gill, formed (in my specimens) by eleven to sixteen beaded ovisacs, 
projecting beyond the gill. 
Glochidia not observed. They have been figured by Lea (Obs., 
XIII, 1874, pl. 21, fig. 2), and have the usual! subovate shape found in 
this genus. 
Color of soft parts whitish. Anal and branchial with brown and 
black margins. Group of papilla brown-black, with a black mark on 
