OCTOBEE 16, 1908] 



SCIENCE 



535 



bands. Specimens from Brownsville are strong- 

 ly banded, the lower band being very wide or 

 split up into from two to six bands. In one 

 specimen there are two wide, dark, brownish- 

 black bands; in the rest of the specimens the 

 bands are liglit brown in color. 

 Praticolella herlcmdieriana (Moricand). 



Sinton, under railroad tie; river drift in 

 Brownsville; Corpus Christi. 



Several of the specimens are unicolored and 

 translucent. Apparently a rare species in this 

 locality. 

 Poly gyro, texasiana (Moricand). 



Kiver drift, Brownsville; under mesquite in 

 house-yard, Brownsville; on beach, Port Isabel; 

 Corpus Christi. 



The specimens of texasiana collected by Mr. 

 Wolcott show a large amount of variation both 

 in size (7.50 to 13.50 millimeters in diameter) 

 and in the height of the spire, the latter varying 

 from ilat to strongly elevated. Several speci- 

 mens have the aperture modified, a character- 

 istic due to immaturity or disease. Three speci- 

 mens are without a parietal tooth and one 

 specimen has a single very small parietal tooth 

 and two small tubercles in place of the peris- 

 tome teeth. The sculpture of the lot of eighty 

 specimens is interesting. Forty-six are typical 

 texasiana, 22 are transition forms between 

 this and the next variety and 11 are typical 

 hyperolia. 

 Polygyra texasiana hyperolia Pilsbry. 



River drift, Brownsville. 



Apparently not common. 



BUXIMtTLID^ 



Bulimulus dealbatus liquabilis Eeeve. 



Corpus Christi. 



Two specimens apparently referable to this 

 race of dealbatus were found in a lot of B. 

 alternatus marice. They are rather corpulent, 

 unicolored and resemble fig. 7, pi. 6, of Pilsbry 

 and Ferriss's paper.^ 

 Bulimulus alternatus marice Albers. 



Sinton, on mesquite; Point Isabel, on beach; 

 Brownsville; Corpus Christi. 



The Brownsville specimens show a wide range 

 of variation in color. Eleven are pure white, 

 29 have the upper whorls streaked, 19 are ir- 

 regularly striped all over and 2 are plain choco- 

 late colored. Two specimens with streaked 

 spires have a well-developed columellar tooth 

 and several specimens show a thickening in this 

 region. Of the Corpus Christi specimens six 

 ^Proc. Phil. Acad., 1906, p. 134. 



have a columellar tooth while seven are without 

 it or have only slight indications of it. 



OLEOCINID^ 



Euglandina singleyana ( W. G. Binney ) . 



Tropical forests. La Esperanza Ranch, 

 Brownsville. 



Apparently a common species. The two 

 dozen specimens secured show little or no vari- 

 ation. 



puprLi.n).a; 

 Pupoides marginatus ( Say ) . 



Old Fort Brown, Brownsville. 

 Typical, but apparently not common. 

 Bifidaria pellucida hordeacella Pilsbry. 

 Old Fort Brown, Brownsville. 

 Very common, associated with the two fol- 

 lowing species. 

 Bifidaria procera (Gould). 



Old Fort Brown, Brownsville. This is the 

 most common pupa in the Brownsville region. 

 It varies somewhat in corpulency. 

 Bifidaria contracta Say. 



Old Fort Brown, Brownsville. Not particu- 

 larly abimdant. 



ZONITIDiE 



It is singular that Mr. Wolcott secured no 

 representatives of this family, as the various 

 species are common throughout Texas. 



SUCCINEID^ 



Succinea luteola Gould. 



On mesquite near Brownsville. Very common 

 and typical. Specimens of all sizes were ob- 

 tained, varying from the yoimg, about 2 milli- 

 meters long, to old specimens 16 millimeters in 

 length. 



PLANOEBID^ 



Planoriis glabratus Say. 



River drift, Brownsville. Several specimens, 

 the majority of which are half-grown, seem 

 referable to this species, which would seem to 

 be distinct from trivolvis, the whorls being 

 narrower and the shell generally more polished. 

 Planorbis cultratus Orbigny. 



A single specimen of this acutely keeled 

 Planorbis was foimd in river drift at Browns- 

 ville. It measures 3 millimeters in diameter. 

 Planorbis liebmanni Dkr. 



River drift, Brownsville. 

 Segmentina obstructa (Morel). 



In river drift, Brownsville. Numerous and 

 apparently typical. 



Frank Collins Baker 



