OPEAS. 361 



The species is referred to Opeas by Pilsbry with some doubt, 

 who considers that " the subtruncate, calloused columella recalls 

 Tortaxis, yet the delicacy of the shell, its small apex, and the 

 oviparous reproduction, are characters of Opeas. It is probably 

 related to 0. avetiacert, Morel., javanicum, Eve., etc., which have 

 the columella similarly truncate." 



I have only seen one specimen, which is in the British Museum. 

 It is from Kancly and measures: length 16*5 mm., diam. 

 4'25 mm. 



324. Opeas sykesi, Pilsbry. 



Opeas si/kesi, Pilsbry, Man. Conch, ser. 2, xviii, 1900, p. 157, pi. 21, 

 figs. 1, 2. 



Original description : " Shell perforate, resembling 0. gracile 

 in sculpture, but with the whorls much shorter, more compactly 

 coiled, more numerous in shells of the same length. Spire 

 straightly and regularly tapering to the small apex. Whorls 

 8| to 10, the embryonic 1| smooth except for a minute subsutural 

 radial striation, which becoming stronger on the post-embryonic 

 whorls, produce a fine, irregularly developed crenulation of the 

 suture, the latter becoming smooth again lower down. Later 

 whorls somewhat flattened. Suture well impressed. Aperture 

 vertical, much shorter than in 0. gracile ; outer lip weakly arcuate, 

 a little arched forward ; basal margin well arched ; columella 

 rather straightened, the edge reflexed. 



" Length 11, diara. 3 '4, aperture 2*9 mm. ; whorls 8J. 



" Length 12-9, diam. 3-5, aperture 3-1 ; whorls 10." (Pilsbry.) 



Hab. Ceylon. 



"This form is readily selected from among 0. gracile by its 

 short whorls and small, wider mouth, with a deep bay where the 

 columella joins the parietal wall. I do not see, in the great 

 number of 0. gracile before me, any approach to this form." 

 (Pilsbry.} 



325. Opeas ? pusillus, //. Adams. 



Bulimulus (End) pusillus, H. Adams, P. Z. S. 1867, p. 307, pi. 19, 



% 17. 



Stenoc/yra pusillus, Nevili, Enum. Helic. Ceylon, 1871, p. 3. 

 Bulimus (Bulimulus) pusillus, Pfeiffer, Mon. Helic. Viv. viii, 1877, 



p. 186. 

 Bulimulus (Leptomerus) ptisillus, Pfeiffer & Clessin, Nomencl. 



Helic. Viv. 1881, p. 234. 

 Ena pusilla. Jousseaume, Me'm. Soc. Zool. France, vii, 1894. 



p. 297. 



Original description : " B. testa sinistrorsa, rimato-perforata, 

 cylindrico-turrita, tenui, ina3qualiter striata, vix nitidula, olivaceo- 

 f usca ; spira elongata, sursum parum attenuata, apice obtusiuscula, 

 sutura distincta ; anfr. 7, convexiusculis, ultimo ^ longitudinis vix 



