205 
3079 Erycina colpoica. Bulf of Cal. 
3080 Rochefortia compressa. Gulf of Cal. 
3081 Aligena nucea. Gulf of Cal. 
3082 Vesicomya suavis. Gulf of Cal. 
eee eae 
3083 Stearns, R. E. C.: 
Notes on Cytherea (Tivela) crassatelloides Conrad, with de- 
scriptions of many varieties. U. S. natl mus pr 21:371-377, t 
23-25. 
Describes the following forms. 
3084 Variety Pauciradiata 
3085 Variety Multiradiata 
3086 Variety Alternata 
3087 Variety Eccentrica 
3088 Variety Serialis 
3089 Variety interrupta 
3090 Variety Luteobrunnea 
3091 Variety Uniradiata 
3092 Variety Biradiata 
3093 Variety Triradiata 
3094 Variety ochracea 
3095 Variety Purpureo-chocolata 
3096 Variety Biseralialis 
3097 Variety Triserialis 
3098 Variety Aurora 
3099 Variety Duplicata 
—_—___——_9 ———___ 
3100 Amphithalamus tenuis 
“Shell elongate-ovate, dark greenish horn-color, with the colu- 
mella and the aperture yellowish white, excepting the dark edge 
of the peristome. Nuclear whorls 1%, well rounded, marked by 
about 15 slender, equal and equally spaced, spiral threads and nu- 
merous, very fine, axial threads, lending the surface a very mi- 
nutely-pitted appearance. Post-nuclear whorls very narrowly 
subtabulatedly shouldered at the summit, well rounded, smooth 
excepting fine, incremental lines. Suture moderately impressed. 
Periphery of last whorl well rounded. Base long, well rounded, 
bearing a low, broad, spiral cord on its middle, which bounds the 
posterior termination of the white area. Aperture oval, very 
oblique; peristome double, the inner fusing with the anterior por- 
tion of the outer lip, while posteriorly it is distinct and at a con- 
siderable distance from the columella and the parietal wall; the 
space between the columella, parietal wall and the inner peri- 
stome is bridged over by a concave band of shelly matter.’’— 
Bartsch, U. S. natl mus pr 41:264, f 3. 
Type locality:—La Jolla, Cal., on seamoss (F. W. Kelsey). 
Monterey, Cal. AA. lacunatus and inclusus are described in 
the same paper as above, with figures. 
3101 Hanna, G. Dallas: 
The American species of Sphyradium with an inquiry as to 
their generic relationships. U.S. natl mus pr 41:371-376, with 
figures. 
3102 Genus Sphyradium Charpentier. 
3103 S: Hasta. Pleistocene, Kansas. 
3104 SS: alticolum. Utah, Colo., and Wyoming. 
Synonymy:—Pupa and Pupilla alticola Ingersoll. 
3105 S: Edentulum. Europe, Asia, etc. 
