636 PROCEEDINGS OF THE ACADEMY OF [DeC, 



Bulimulus (Rhinus) roohai n. sp. PI. XXIII, figs. 19, 20. 



Shell deeply and rather narrowly umbilicate, ovate conic, rather 

 solid, corneous in the young, the last whorl in the adult sometimes 

 showing a tendency to spiral banding in the darkest specimens, but 

 more frequently becoming whitish and translucent; surface shining; 

 first 1| nepionic whorls with finely crinkled striae, then finely, closely 

 and irregularly retractively striate, the strise cut by a few distant 

 incised spiral lines, with intervening obsolete lines which disappear 

 on the base and lower part of the last whorl; spire conic, with slightly 

 convex sides; apex obtuse. Whorls 7, slightly convex, the last 

 rounded oval, not descending in front; sutures sharply defined, 

 moderately deep. Aperture subvertical, ovate, about one-half as 

 wide as high, nearly one-half the length of the shell, whitish to 

 corneous, corresponding to the color of the last whorl, very rarely 

 showing an}^ banding inside; peristome obtuse, very slightly reflected 

 below, whitish; columellar margin dilated above and refiexed; a 

 broad, thin parietal callus uniting the extremities of the lips. 



Very young specimens show the characteristic pilation of the sub- 

 genus, but it is entirely absent in all mature specimens. 



Alt. 24, diam, 13.5, alt. of aperture 11, diam. of aperture 5.75 mm. 



This species, which seems to be new, is similar to B. (Protoglyptus) 

 durus Spix in size and general appearance, but it differs by having 

 fine, crinkled strise in the embryo, whilst durus has vertical ribs. 

 It is more solid than B. vesicalis uruguayensis Pilsbry, and it has 

 spiral striae, a slightly expanded outer lip and a broader columella. 

 It differs from B. sarcochilus by being stouter and having a larger 

 aperture. It is remarkable among the species of Rhinus by having 

 hairs only in the young, no trace of them remaining in the adult stage- 



This is one of the commonest shells at Ceara-Mirim, generally 

 found living about an inch underground, under sticks and stones. 

 About a dozen living and dead specimens were taken at Jacoco, 

 about seven kilometers from Ceara-Mirim, one living and several 

 dead at Baixa Verde, and a single dead, but well-preserved mature 

 specimen was sent to Dr. Branner by Mr. G. A. Waring, of the 

 Brazilian Geological Survey, from "the plains southeast of Limoeira, 

 State of Ceara, near the Rio Jaguaribe." The species is named for 

 Mr. Francisco Dias da Rocha, of the city of -Ceara, who has done so 

 much through the collections made for his Museu Rocha to extend 

 our knowledge of the State of Ceara along all natural-history lines. 

 Bulimulus (Rhinus) rochai taipuensis n. subsp. PI. XXIII, fig. 17. 



About twenty specimens of this well-marked variety were taken at 



