292 PUPILLID7E. 



261. Bifidaria avanica, Benson. 



Pupa avanica, Benson, A. M. N. H. ser. 3, xii, 1863, p. 428; Blanford, 

 J. A. S. B. xxxiv, 1865, p. 95 ; Pfeiffer, Mon. Helic. Viv. vi, 1868, 

 p. 335 ; Hanley & Theobald, Conch. Ind. 1876, pi. 160, fig. 7 ; 

 Sowerby, Conch. Icon. xx. 1876, Pupa, pi. 7, fig. 60 



Pupa ( Vertigo) avanica, Nevill, Hand List, i, 1878, p. 197. 



Pupa (Pupilla) avanica, Pfeiffer Clessin, Nomencl. Helic. Viv. 

 1881, p. 355. 



Original desertion : " P. testa umbiiicata, ovato-oblonga, sub- 

 cylindrica, vix striatula, nitida, fusco-cornea, translucente ; spira 

 oblonga, versus apicem obtusiusculum couica, sutura valde im- 

 pressa; anfractibus 5|, subconvexis, ultimo antice ascendente ; 

 apertura ovata, superne obtusa sexdentata, plica parietali 1 

 duplicata, intrante, dentibus columellaribus 2 profundis et 

 palatalibus 3 profundis munita ; peristomate undique expanse, 

 marginibus tenuibus callo parietali lato jimctis. 



" Long. 2^, diam. 1^ mill." (Benson.) 



Hob. Burma: Ava (Theobald) Mandalay (Blanford). 



The species is characterized by the very convex whorls and the 

 deep suture, resembling mimula in that respect, but it is more 

 conoid and the last whorl becomes more contracted, while in 

 mimula the aperture is more rotundate. A specimen in the 

 Hungerford collection in the British Museum shows a slight 

 additional parietal denticle nearer the columella. A shell in the 

 Beddome collection has only two palatal plicae. 



262. Bifidaria mimula, Benson. 



Pupa mimula, Benson, A. M. N. H. ser. 2, xii, 1853, p. 95 ; Pfeiffer, 

 Mon. Helic. Viv. iv, 1859, p. 676 ; Nevill, Enum. Helic. Ceylon, 

 1871, p. 3 ; Hanley & Theobald, Conch. Ind. 1876, pi. 160, fig. 4 ; 

 Sowerby, Conch. Icon, xx, 1876, Pupa, pi. 7, fig. 61. 



Pupa (Leiostyla) mimula, Pfeiffer, Malak. Blatt. ii, 1856, p. 176. 



Pupa (Vertigo) mimula, Nevill, Hand List, i, 1878, p. 198. 



Pupa ( Vertigo (Alaea)) mimula, Pfeiffer & Clessin, Nomencl. Helic. 

 Viv. 1881, p. 358. 



Original description : " Testa rimata, ovato-oblonga, subcylin- 

 dracea, oblique tenuiter plicatula, pallide cornea, apice obtuso, 

 sutura profundiuscula ; anfractibus 5, convexis, ultimo vix ascen- 

 dente ; apertura ovata, verticalis, 5-plicata, peristomate tenui, 

 expanse, marginibus callo tenui expanse junctis, plica 1 intrante, 

 majuscula, parietali, 1 columellari, 1 basali prof unda, 2 palatalibus 

 profundis. 



" Long. 2, diam. 1 mill." (Benson.) 



Nab. Ceylon : Cape Pedro (Layard). 



"Nearly allied to and somewhat larger than the Himalayan 

 P. huttoni, Nobis." (Benson.) 



A well-characterized form. The parietal lamella is compressed 

 and largest of all, the columellar one being somewhat smaller, 

 while the three palatals are very minute. I have seen four 



