MANUAL OF CONCHOLOGY. 



Vol. yi\l\BULlMULlD^(Bulimidin(z}. 



Genus BOTHRIEMBRYON Pilsbry, 1894. 



Bothriemlryon PILS., Nautilus viii, p. 36 (July, 1894), type B. 

 melo. 



Liparus MARTENS in Albers, Die Heliceen, 18GO, p. 229, type 

 B. inflatus Lam. (Proposed as a subgenus of Buliminus Ehrenb.). 

 PFEIFFER-CLESSIN, Nomencl. Hel. Viv., 1878, p. 282. 



Not Liparuf ALBERS, Die Heliceen, 1850, p. 172 (for B. atomatus 

 and favannii)) nor PFR., Malak. Bl., 1855, p. 157 (B. atomatus, 

 favannii* crassilabris'), nor of H. & A. ADAMS, Gen. Rec. Moll., ii, 

 p. 13$ (as a subgenus of Limicolarid]. Not Liparus OLIVIER, En- 

 tomologie, ou Hist. Nat. des Insectes, vol. v, pp. 73, 283, 1807 

 (Coleoptera). 



Australian Bulimulidce with ovate- or oblong-conic shell of moder- 

 ate solidity or thin, perforate or closed umbilicus, and simple unex- 

 panded outer lip ; the columellar lip dilated or reflexed, not calloused 

 or folded ; apex with 1 J to 2 whorls finely pitted, like a thimble, or 

 vertically wrinkled or costellate, the subsequent whorls differently 

 sculptured. 



The jaw is arcuate and plaited, the median segment triangular or 

 wedge-shaped. Radula about as in Bulimulus. Genital system sim- 

 ple, much as in Bulimulus. 



The sculpture of the apex (plate 4) varies considerably, passing 

 from a pattern of subvertical wrinkles, which may be close and 

 waved (gunni, onslowi), or more spaced (spenceri), to wrinkles so 

 much crimped as to anastomose and form a network (gratwicki, first 

 whorl of inflatus); thence the transition to a regular pitted pattern 

 (as in conispira, kingi, dux) is by gradual and easy steps. This series 

 of changes is almost exactly paralleled in the American genus Bull- 

 mulus ; and as in that genus, the vertically wrinkled pattern is prob- 



