1906. ] NATURAL SCIENCES OF PHILADELPHIA. 125 
Bulimulus d. pecosensis Gomobasis comalensis 
Bulimulus alternatus marve Paludestrina seemani 
Holospira roemeri Paludestrina diaboli 
Holospira goldfussr Ammicola comalensis 
Microceramus texanus Cochliopa riograndensis 
Euglandina singleyana Potamopyrgus spinosus 
Bifidaria procera cristata Valvata micra 
Nine genera of this list are not known to occur in the Austro- 
riparian or humid region of Texas. For list of the latter fauna, 
the student is referred to the catalogue of Mr. J. A. Singley, cited below, 
from which a long list of Austroriparian forms of Eastern type may 
readily be compiled. 
The first list of Texan mollusks of any extent was published by 
Romer in his excellent work on Texas, 1849. Numerous references 
to the terrestrial mollusks will of course be found in Binney’s successive 
volumes. In 1878 Mr. A. G. Wetherby® published some notes on the 
forms he found in eastern Texas (American Naturalist for 1878, pp. 
184, 254). The principal source of information, however, is Mr. J. A. 
Singley’s Contributions to the Natural History of Texas, part I, Texas 
Mollusca, published in the Fourth Annual Rep. Geol. Survey of Texas, 
1893. In this list Mr. Singley has included with the records of his 
own extensive collecting, others from many sources, so that the records 
are of unequal value. The Texan list stands much in need of revision 
and a good many names thereon are doubtless to be rejected, either 
because the forms do not occur in Texas, as in the case of Ampullaria, 
or because of wrong identifications; yet the work cannot be done until 
resident naturalists take it up. 
HELICINIDA. 
Helicina orbiculata tropica ‘Jan’ Ptr. 
Texas: San Marcos, Hays county; Comal county, around New 
Braunfels; San Antonio, Bexar county; two miles north of Hondo, 
Medina county; Del Rio, Devil’s river and High Bridge of the Pecos, 
Val Verde county. 
Some colonies are all white; others are mingled with red or blue 
shells. 
HELICIDA. 
Praticolella berlandieriana (Moric.). Figs. 1, 2. 
Texas: San Marcos, Hays county; Guadalupe river above New 
8 By error Mr. Wetherby’s name was printed ‘‘W. G. Weatherby ”’ 
