CERASTUS. 267 



further comprises five specimens from Poona. These range in 

 dimensions from 21x12 to 19x11-5 mm., and have the trans- 

 verse striae more pronounced and more regular than is the case in 

 typical jerdoni ; the spiral incised lines, on the other hand, are 

 not so wavy and not quite so apparent, while the peristome is 

 more expanded, the columellar margin especially being verv 

 broadly triangular. 



237. Cerastus moussonianus, Petit. 



BiiUinus moussonianus, Petit, Journ. Conchvl. ii, 1851, p. 266, pi. 7, 



fig. 4 ; Pfeiffer, Mon. Ilelic. Viv. iii, 1853, p. 346 ; Hanley & 



Theobald, Conch. Ind. 1870, pi. 21, fig-. 4. 

 Buliminus (Cerastus) moussoiiianus, Nevill, Hand List, i, 1878, 



p. 132; Kobelt, Coneh.-Cab., Fam. Buliminidae, 1900, p. 676, 



pi. 102, tig. 21 : torn. cit. 1902, p. 892, pi. 127, figs. 12-16. 

 BuUmina { Cerastus) vioussoniatia, FMSev & Clessin, Mon. Helic. 



Viv. 1881, p. 286. 

 Cerastus moussonianus, Kobelt & MollendoriF, Nachr. Deuts Malak 



Ges. 1903, p. 41. 

 Buliminus moussonianus, Peile, Journ. Bombay Nat Hist. Soc xi 



1908, p. 131. ^ ' ' 



Orirjinal description : — " B. testa ovato-ventricosa, tenui, trans- 

 lucida, umbilicata, pallide cornea ; spira conica ; anfractibus senis 

 convexis, longitudinaliter minuteque striatis ; striis obliquis ; 

 apertura subrotundata ; labro tenui, expanso, subreflexo ; um- 

 bilico parvo. 



" Long. 16, larg. 9 mill." {Petit.) 



Hah. India: Bombay (C7tar6oH?nVr) ; Ahmednuggar (Fairiawl-) ; 

 Baroach, Khandala, and Surat {Blanford, FairhanJc) ; Sholapur 

 {West); Bombay Island {Peile); Kutch {Stoliczl-a). 



Petit states that it is near B. ah>/ssiniais, but shorter and not 



Fig. 99. — Cerastus moussonianus, var. SLell 5, sculpture f. 



as widely umbilicated, while Kobelt considers it probably a variety 

 of that species. Pfeiffer and Clessin, on the other "hand, are 

 rather inclined to regard it as synonymous with B. cliar- 

 honnieri, Pfr. 



To judge from Petit's original figures I must consider it nearer 

 to C. abyssinicus, but it has a more inflated body-whorl and the 

 ribs appear more crouded. From C. charbonnieri it may be 



