450 SUCCINEIDJE. 



Var. aurantiaca v. rufo-cornea. 



Hob. India : Western Ghats, Mahableshwar (Blanford) ; var. 

 Torna Hills (Blanford); Pondicherri (Mus. Cuming); Poona (Bed- 

 dome Coll.}. 



" Shell conically ovate, rather thin, but little polished, distinctly 

 and nexuously striated, greenish horny in colour. Spire step- 

 like, apex rather pointed, suture much impressed. AVhorls 

 scarcely 3, very convex, the last about -| of the length. Aperture 

 oval, oblique ; peristome thin, the right margin moderately curved 

 forwards ; the columella arcuate, receding, and covered with a 

 thin callus. The largest shell 1 possess measures 20 mm. in 

 length. A rufous variety occurs at Torna Hill, near Sinhgarh, 

 west of Poona. 



"This is a rock-inhabiting species, found on cliffs and large 

 blocks of basalt at Mahableshwar and Torna, and is allied to 

 S. girnarica, a larger and thicker form, rather differently shaped, 

 found by Mr. Theobald on the basaltic rocks of Girnar Hill, in 

 Kattywar. The animal of 8. collina bears a considerable external 

 resemblance to that of the subgenus Lithotis, which has a similar 

 habit. The figures in the ' Conchologia Indica' give a fair idea 

 of the species, but the spire in fig. 8 is rather too large." 

 (Blanford.) 



Both S. collina and S. girnarica are somewhat variable, and 

 differ practically only by the former having a more slender spire, 

 more distant and coarser stria3 being almost ribbed in fact 

 and in being usually greenish corneous ; but some shells in the 

 Beddome collection, from the Bombay Ghats, are amber coloured ; 

 they range from 13 to 16 mm. in the greater diameter. 



The type, illustrated in Conch. Ind. pi. 68, figs. 8 and 9, has 

 been presented to the National Collection by Mr. Harvey, as well 

 as the shell shown in fig. 10 on the same plate, from the type 

 locality. This latter form is very distinct, with very tumid 

 whorls, and although it has a mature appearance it is composed of 

 only 2% whorls and has a diameter of 7'5 mm. On the other hand, 

 three shells in the Theobald collection, also from Mahableshwar, 

 measure 15 mm. in diameter. The Cuming collection contains 

 three specimens from Pondicherri, labelled S. rugosa, but they 

 are not that species and, although a pale form, I refer them with- 

 out hesitation to S. collina ; they measure : 16 X 10 x 6 mm. 

 The variety aurantiaca is also very distinct from the type in 

 appearance, being of a dark amber colour ; three specimens from 

 the Bombay Ghats, in the Beddome collection, possessing three 

 whorls, measure : length 19, diam. 11 mm. The same collection 

 comprises some shells from Mahableshwar which are rather paler 

 than the typical form and are in beautiful fresh condition, ex- 

 hibiting some distant irregular spirals ; they are also composed of 

 three whorls, but measure : length 24, diam. 15 mm., and are 

 therefore considerably larger than the type. 



