90 THE NAUTILUS. 
females found by myself on Aug. 31, 14, not a single gravid 
one turned up. Wilson and Clark (Bur. Fisher. Doc. 758, ’12, 
p. 48) report glochidia in July for C. glans. 
All specimens examined have the same anatomical structure 
agreeing with that of C. glans. The caruncle of the mantle- 
margin generally is brown, lighter or darker, varying to white 
or blackish. Its shape is short subcylindrical or hemispher- 
ical. The edge of the marsupium has black-brown pigment. 
The glochidia are subovate, higher than long, L. 0.17 to 0.18, 
H. 0.19 to 0.20 mm., thus agreeing with those of C. parva, as 
described previously (Nauti. 28, 715, p. 181). 
CONRADILLA CAELATA (ConRAD). (See: Lemiox rimosus (Raf.). 
Ortmann, 1. c., p. 574.) 
Anatomy: see Nautin. 30, 716, p. 39. The nomenclature 
will be discussed elsewhere. The new generic name Conradilla 
takes the place of Lemiox Raf., used in the publications referred 
to. 
MeEpIoNIDUs conraDIcus (LEA). (See: Medionid. plateolus (Raf. ) 
Ortmann, l. c., p. 575.) 
Anatomy: see Ann. Carn. Mus. 8, 712, p. 335, fig. 22, and 
Nautiv. 28, 715, p. 142. A misprint in the latter paper should 
be corrected; the L. of the glochidium is 0.22 mm., not 0.28. 
The breeding season is now rather well known; gravid females 
are found from the beginning of September (earliest date Sept. 
6), and glochidia as early as Sept. 13; discharge of glochidia 
has been observed in numerous cases from May 11 to May 20. 
Eurynia (MicroMyA) PERPURPUREA (LEA). (Ortmann, l. c., 
p. 576.) 
Anatomy: see NauTiL. 29, 715, p. 68. 
Immature glochidia have been found on Sept. 5, 718, mature 
ones on Sept. 21, 712. 
EKurynrA (MicroMyA) NEBULOSA (ConrRAD). (Ortmann, l. c., 
pads.) 
Anatomy: see NautTIL. 29, 715, p. 64. 
Investigation of additional specimens has confirmed the char- 
