LYMNIDZ OF NORTH AMERICA. 367 
RECORDS. 
UNITED STATEs. 
CALIFORNIA: Antioch, Contra Costa Co. (Carlton); San Antonio, San 
Bernardino Co. (Lea); San Francisco, San Francisco Co. (Rowell) ; Alameda 
Co. (Walker). 
WasHINGTON: Green Lake, Seattle, King Co. (Randolph). 
BritIsH AMERICA. 
British COLUMBIA: Vancouver Island (Walker). 
GEOLOGICAL DistTRIBUTION: Unknown. 
Ecotocy: Not recorded. The habitat relations of tryoni are 
probably similar to those of palustris. 
REMARKS: Tryonit is quite a distinct little species, though related 
to proxima. It is always a smaller species than proxima though hav- 
ing about the same number of whorls, and the spire is not so elongated. 
The sutures, also, are shallower and the whorls are more flat-sided. 
It is not particularly related to palustris, being easily separated by its 
smaller size, regularly conical spire, flattened whorls and by its regu- 
larly ovate aperture. All of the specimens examined have a peculiarly 
delicate yet distinct sculpture like an engine-turned surface. The 
whorls vary somewhat in corpulency, and the aperture is more ovate 
in some specimens than in others. The columellar plait is quite 
prominent. Small specimens of palustris have been seen in various 
collections from localities east of the Sierra Nevadas, which have been 
labeled tryoni, but no authentic material has been seen from this 
area. It has doubtless been reported as palustris from the region west 
of the Rocky Mountains and a careful search through the collections 
will probably widely extend the distribution, besides filling in many 
blanks on the map. 
Lea first named this species traskii but later changed the name to 
tryoniana on account of Tryon’s traskti a distinct species named in the 
previous year. Tryon, however, used the name tryomi LEA, MS, in 
1865 thus antedating Lea’s name by a year. Lea’s original specimens 
are in the Smithsonian collection and compare favorably with the 
specimens illustrated in this monograph. (Pl. XX XIX, fig. 4, one of 
the type specimens, No. 121470). The figure in Tryon’s continuation 
of Haldeman is not good as will be seen by a comparison with the 
photograph of the type specimen. 
1Jn the fourth annual report of the Geological Survey of Texas (p. 188) 
Mr. Singley records tryoniana as a fossil or subfossil from Tule Canyon, Swish- 
er County, Texas, He says of it “Nearer this than any other species. Well 
fuese uhelis, and ha seriousiy doubta thelr being tryonil, authentic specimens 
of which have not been seen from the great plains region. These specimens 
were probably small or immature forms of palustris, which species has been 
reported as a fossil from northern Texas. 
