1913.] NATURAL SCIENCES OF PHILADELPHIA. 629 



This was the commonest species of Streptaxis at Ceara-Mirim, 

 nearly two hundred specimens having been taken; and four each were 

 taken at Estremoz and Baixa Verde, mostly under dead leaves and 

 •debris, but more rarely under stones and dead wood. The species, 

 which seems to be new, is related to S. glaber Fir., but it is larger, 

 with slightly fewer whorls, a distinctly striate spire and no parietal 

 teeth. It is named for Miss J. M. Cooke, of Point Loma, California, 

 who has added many species and varieties of shells to the known 

 fauna of Southern California and Lower California, 

 streptaxis abunaensis n. sp. PI. XXII, figs. 8, 9, 10. 



Shell quite heavy, rather high, the spire markedly convex and 

 rotund, umbilicus moderately open; 'light horn colored, with a thin, 

 fugaceous, j^ellowish-brown epidermis; nepionic whorl smooth, 

 followed by a series of broad, low, rounded, strongly retractive, 

 slightly arcuate costulae with moderate interspaces (about nine to 

 the millimeter on the penultimate whorl), becoming obsolete over the 

 whole of the last whorl, except at the mouth of the umbilicus, where 

 they can be seen with a glass. Whorls about 6, the first three rather 

 narrow and crowded, the last two much l)roader, the shell showing 

 the characteristic distortion of the genus ; sutures distinct, but not 

 impressed. Aperture somewhat triangular, a little broader than 

 high, very distinctly angulated at the juncture of the lip with the 

 parietal wall; peristome white, slightly reflected above, the reflection 

 increasing to the lower juncture with the parietal wall which it meets 

 at an angle of about 90 degrees; a slight groove behind the basal 

 lip, running into the umbilicus. 



In five specimens there are three nearly equidistant teeth within 

 the mouth, about in the middle of the parietal wall and of the basal 

 and outer lips, the parietal tooth being narrow and high and directly 

 entering for about 1| millimeters. In a sixth specimen the parietal 

 tooth is wanting altogether, although the other characteristics are 

 well marked. 



Alt. 6.25, greatest diam. 8, least diam. 6.25, width of aperture 2.5, 

 alt. of aperture 2.25, diam. of the umbilicus .7 mm. 



Two living and four dead specimens were taken at Camp 33, 

 M. & M. R. R., this point being known as Abuna in Brazil. 



This species, which seems to be new, is closely related to *S. cumin- 

 gianus Pfr., from which it differs chiefly by the striation of the spire 

 and larger size. 



Genus HAPPIA Bourguignat. 

 Happia snethlagei n. sp. PI. XXII, figs. 3, 4. 



Shell very widely, perspectively umbilicate, thin, translucent, 



