PLANISPIRA. 155 



122. Planispira albicostis, Pfeiffer. 



Helix albicostis, Pfeiffer, P. Z. S. 1860, p. 134 ; Malak. Bliitt. vii, 



1861, p. 238. 

 Helix (Trachia) albicostis, Pfeiffer & Clessin, Nomencl. Helic. Viv. 



1881, p. 181. 

 Planispira (Trachia) albicostis, Pilsbry, Man. Conch, ser. 2, ix, 



1894, p. 116. 



Original description : " T. sublate umbilicata, depressa, tenuis, 

 granulato-rugosa et pilis brevibus obsita, cornea, costulis obliquis 

 albidis munita; spira parum elevata ; anfr. 4 convexiusculi, 

 ultimus superne subangulatus, supra angulum leviter sulcatus, 

 antice deflexus ; apertura perobliqua, ovalis ; perist. tenue, mar- 

 ginibus fere contiguis, supero expansiusculo, basali breviter 

 reflexo. 



" Diam. maj. 9|, min. 8, alt. 44 mill." (Pfeiffer.) 



Hob. India : Ahmednuggar. 



The species bears a superficial resemblance to P. crassicostata, 

 but in the latter the costse are much more prominent and more 

 widely spaced, the umbilicus is a little more contracted, and the 

 periphery is acutely keeled, the keel being pinched above and 

 below, and, owing to the strong costae, it is crenulate, whereas in 

 P. albicostis the periphery is simply angulated with a shallow- 

 furrow above it. The principal character, however, differentiating 

 the two species is the presence in P. albicostis of crowded short 

 hairs, placed on raised tubercles, arranged in rows which obliquely 

 intersect the lines of growth. 



123. Planispira asperella, Pfeiffcr. 



Helix asperella, Pfeiffer, Symb. Hist. Helic. iii, 1846, p. 78; 



Reeve, Conch. Icon, vii, 1852, pi. 125, fig. 752 ; Pfeiffer, Conch.- 



Cab., Helix, ii, 1853, p. 93, pi. 82, figs. 22-25; Hanley & 



Theobald, Conch. Ind, 1875, pi. 131, figs. 8, 9; Kobelt, 111. 



Conch. Buch, ii, 1879, pi. 76, fig. 7. 



Helix (Planispira) asperella, Nevill, Hand List, i, 1878, p. 77. 

 Helix (Trachia} asperella, Martens, Die Heliceen, ed. 2, 1860, 



p. 160; Tryon, Man. Conch, ser. 2, iv, 1888, p. 62, pi. 14, 



fig. 58. 

 Planispira (Trachia) asperella, Pilsbry, Man. Conch, ser. 2, ix, 



1894, p. 116, pi. 19, fig. 25 (shell) ; pi. 34, fig. 4 (radula). 

 Helix granifera, Benson, MS. 



Original description : " T. umbilicata, depressa, granulis 

 minutis undique exasperata, sordide albida, fasciis run's varie 

 cingulata ; spira vix elevata ; anfr. 4 planiusculi, ultimus basi 

 convexus, antice parum descendens, juxta umbilicuui mediocrem, 

 infundibuliformem subcompressus ; apertura obliqua, lata, sub- 

 orbicularis ; perist. undique expansum, marginibus approximatis, 

 callo tenui junctis." (Pfeiffer.) 



Major diam. 13-16, minor 10-13, alt. 6J-8J mm. 



Hab. India : Bundelkhund (Benson) ; Chanda (Nevill). 



