388 TERRESTRIAL AIR-BREATHING MOLLUSKS. 



Sh., I. I have preserved no specimen from which I can more accurately draw 

 the individual teeth. It has 75 rows of 37—1 — 37 teeth, all apparently of the 

 same character as in B. deulbiilus^ as is also the case in B. Schitdeanus. 



I have not examined B. multilineatus, Marielinus, Floridanus, patriarcha. 

 That of B. Dormani is very different from alternatus^ Schiedeanus, and deal- 

 batus. It will be described below, under B. Dormani. 



Bulimulus patriarcha, W. G. Binney. 



Shell perforate, ovate, heavy, white, and wrinkled ; whorls 6, convex, the 



last ventricose, equalling in lenoth five sevenths of the shell ; 



Jig 270 ... 



' ' aperture ovate ; peristome simple, thickened within, the ex- 



tremities joined by a heavy white callus, the columellar 

 extremity slightly reflected, so as partially to conceal the 

 umbilicus. Length 35, diameter 1 9 mill. ; aperture, length 

 19, diameter 12 mill. 



Bulimus patriarcha, W. G. Binney, Proc. Acad. Nat. Sci. 



rhilad., 1858, 116 ; Terr. Moll., IV. 130, PI. LXXX. Fig. 



13; L. & Fr.-W. Sh., I. 200 (1869). — Pfeiffer, Mai. 



Blatt., 1859, 48. 



Thaumastus patriarcha, Tryon, Am. Journ. Conch., III. 171 

 B. patriarcha. 



(1867). 



Mexico, at Buena Vista (Berlandiere) ; also in the Texan Subregion. 



Named from its greater size and more antiquated appearance, as compared 

 with the allied species, but the young individuals are as readily distinguished 

 as the most mature from any other. It is most nearly related to B. Schiede- 

 anus, but differs from that species in having a shorter, more rapidly acuminated 

 spire, longer and much more globose body-whorl, more lengthened and nar- 

 rower aperture, and rougher surface. 



Animal not observed. 



Bulimulus alternatus, Say. 



Vol. in. PI. LI. a, upper and lower Fig., LI. b. 



Ovate-conic, with alternate gray and brownish longitudinal vittae. Inhabits 

 Mexico. Shell umbilicated, ovate-conic, with longitudinal lines, subequal, gray 

 and light brownish vittae ; the brown is paler, almost approaching in some in- 

 stances a drab ; the white vittae consist of more or less confluent, transverse, 

 irregular lines, and small spots ; whorls about 6, a little convex ; suture not 

 profoundly impressed ; labrum (in some specimens) with a thickened line or 

 rib on the inner submargin, within white, with a perlaceous tinge. Length, 1^ 

 of an inch ; greatest breadth, ^-^. This species appears to be not uncommon 



