264 ENID^E. 



more diaphanous, the spire is shorter, the body-whorl is more in- 

 flated and the ribs are more distant. The interstices between the 

 costae are closely and minutely spirally striated. The figure in 

 Conch. Ind. shows a more elongated spire, the last whorl is less 

 swollen and the aperture narrower than in typical abyssinica. 



In size the species varies from 20x12 and 19x11*5 to 

 16x10-5 mm. 



234. Cerastus fairbanki, Pfeiffer. 



Bulimusfairbanki, Pfeiffer, P. Z. S. 1857, p. 109 ; ibid., Mon. Helic. 



Viv. iv, 1859, p. 410; Hanley & Theobald, Conch. Ind. 1870, 



pi. 20, fig. 9. 

 Buliminus ( Cerastus) scalaris (Hairburn), von Martens, Die Ileli- 



ceen, ed. 2, 1860, p. 232. 

 Buliminus (Cerastus) fairbanki, Nevill, Hand List, i, 1878, p. 133 ; 



Kobelt, Conch.-Cab., Fam. Bulhninidae, 1900, p. 677, pi. 102, 



fig. 23. 

 Bulimina (Cerastus) fairbanki, Pfeiffer & Clessin, Nomencl. Helic. 



Viv. 1881, p. 286. 

 Cerastus fairbanki, Kobelt & Mollendorff, Nachr. Dents. Malak. 



Ges. 1903, p. 40. 



Original description : " T. anguste et compresse umbilicata, 

 ovato-conica, tenuuiscula, conferte striata et costis irregulariter 

 distantibus cornpressis subarcuatis sculpta, sub lente exilissime 

 spiraliter striata, haud nitens, fulvescenti-albida ; spira conica, 

 apice obtusa ; anfr. 6 convexi, ultimus spira vix brevior, juxta 

 umbilicum compressus ; apertura parum obliqua, elliptico-ovalis ; 

 perist. album, marginibus conniventibus clextro mediocriter ex- 

 panso, columellari stricto, late patente. 



" Long. 19, diatn. 9| mill." (Pfeiffer.) 



Hob. India : Ahmednuggar (Fairbank). 



This is the best characterized of all the Indian species of 

 Cerastus, on account of the prominent and widely spaced ribs, 

 which are about 2 mm. apart. Five specimens in the Beddome 

 collection, from Ahmednuggar, the type-locality, show that two 

 forms may be recognized. The one typical, broadly conoid, the 

 other with more elongated spire and narrower base ; the ribs are 

 neither quite so widely nor so regularly spaced, and the form 

 would almost constitute a passage to C. distans. 



235. Cerastus malabaricns, Pfeiffer. 



Btdimus malabaricus, Pfeiffer, Malak. Bliitt. iv, 1857, p. 156 j ibid., 



Mon. Helic. Viv. iv, 1859, p. 411. 

 Buliminus (Cerastus) deccanensis (Blanford), Nevill, Hand List, i, 



1878, p. 133 (nom. mut). 

 Bulimina ( Cerastiis) malabarica, Pfeiffer & Clessiu, Nomencl. Helic. 



Viv. 1881. p. 286. 

 Cerastus malabaricus, Kobelt & Mollendorff, Nachr. Deuts. Malak. 



Ges. 1903, p. 41. 



