MOLLUSCA OF INDIA, 



313 



rocldiiigton, 1910.) One large and four very young specimens. 

 " The small slugs were found ou old tree-trunks and damp ground 

 in the tir woods.' 



Shell (tig. 5) white, margins thin transparent, central portion 

 thickened, elongately quadrate, symmetrical ; the protoconch is 

 granular internally, in young specimens this is probably the early 

 state of the shell, the surface is marked by layers of concentric 

 growth. 



Length 6-0, width 3-5 mm. 



Animal (fig. 1). Largest, length 30 mm. ; smaller specimens, 

 (1)19; (2)18; (3)17-5; (4) lt>-5 mm. Ochraceous, grey on ex- 

 tremity of the foot. The mantle (fig. 4) dark grey, the darkest part 

 of the animal, its surface rough, broken up by irregular fine papu- 

 lation and short grooves, i)aler round the respiratory orifice (fig. 3) 

 forming a sort of disc (fig. 3), (vide Mon. Moll. Brit. Is. p. 79, 

 fig. 9(3, which is somewhat similar to Linia.v Jlains : however, 

 the shell of this is quite difl'erent from this Kaslimir species). Toot 

 very pointed, dorsum sharply keeled, very distinctly divided on the 

 sole, an inner and outer line of parallel quadrate tubercles ou each 

 side of the central area. The grooving on the side of the foot 

 rather close and regular and broken up into elongate quadrate 

 tubercles ; on the peripodial margin there is a single groove, con- 

 stituted by a double row of minute tubercles. 



The visceral sac extends to the extremity of the foot. 



Generative organs (tigs. 8 & 9). The ovotestis is a large spreading 

 black mass, and is conspicuous on the surface of the visceral sac, 

 when the animal is removed from within its integumental covering. 

 The hermaphrodite duct is long, fine, closely twisted at one 

 part and then becoming thicker joins a very large albumen gland 

 of a pale lemon-yellow colour. The prostate is remarkably well 

 developed and continues close up to the male organ ; itis connected 

 with it by a very thick short vas deferens, which unites with the 

 penis on the side ju^t below the top of the sheath. The ovotestis 

 is continuous with it close up to the vas deferens, the free oviduct 

 being very short. The penis is a short, thick cylinder, with a 

 short strong flat retractor-muscle on the side. A longitudinal section 

 (fig, 11) through this showed a single bulbous pillar, and some 

 short plications above. This is more after the same part of 

 L.Jlavus, 1. c. fig. 98, p. 79. The spermatheca is a globose sac on 

 a very short stalk, joining the free oviduct close to the generative 

 aperture. No accessory glands seen. 



The jaw is oxygnathous with a central projection darkish in 

 colour — it was unfortunately lost. 



In the radula (fig. 6, 6 a) the central tooth has straight sides, 

 with just a sign of a notch below the apex ; the admedians aie on 

 broader plates and liuve a cusp on both the inner and outer eides, 

 up to the nth tooth, in which these cusps are very reduced in size 

 -and are not seen in the 13th and 14th. About the 21st they are 

 unevenly bicuspid, the outer cusp well below the point ; the marginal 



2d 2 



