10 Records of the Indian Museum. [Voiv. XIX, 



rather rough, the first three whorls finely and transversely striate, 

 becoming regularly ribbed on the two last, this ribbing is indis- 

 tinct on basal side. Colour deep ochraceous, with a narrow 

 ruddy brown band, just above the periphery. Spire moderately 

 conoid, apex blunt. Suture impressed. Whorls 5J, rounded on 

 the periphery. Aperture semilunate. Peristome white, sinuate 

 above, near upper inner angle, thickened and reflected, a callous 

 on the parietal wall, columellar margin oblique. 



Sizes. — Major diameter 32*0 ; alt. axis 16 mm. 



I at first took this species to be C. theohaldi of Gude, origi- 

 nall}'^ described and figured in Pro. Malac. Soc. 1914, p. 55, also in 

 Fauna British India, 1914, p. 177, but on my recently comparing it 

 with the type specimen in the British Museum, although a close 

 ally, it differs in several characters, being much larger, differently 

 sculptured, and having the peristome sinuate. It comes from the 

 eastern side of the Shan States. 



Colonel R. G. Woodthorpe made a very fine collection of land 

 moUusca on the Siam boundary when he was laying it down, and 

 among the species preserved in spirit this is one and I am able 

 to describe the animal. 



Foot extremely long, extending to a very fine point : right 

 dorsal lobe small, the left inconspicuous in two small lobes (fig. i) ; 

 visceral sac closely mottled with black. The generative organs 

 (figs. 2 and 3) are complicated, the penis elongate and much coiled 

 from the generative aperture to the retractor muscle which is close 

 to a very sharp bend {p) at the end of the sheath, epiphallus 

 {ep) very long and an extremely long flagellum (/). The vas 

 deferens is also of great length. The spermatheca rises from the 

 free oviduct, has one sharp bend, and towards the albumen gland 

 its duct is imbedded in the oviduct, terminating in a globose sac 

 as dotted in the figure ; this was seen in course of dissection but 

 got broken off. The free oviduct opens into an ample atrium {a) 

 with strongly i)licate internal walls (fig. 4). 



Close above the atrium and opening into it there is an oblong 

 somewhat flattened sac (fig. 6) with leathery walls, the distal end 

 produced into a short cylindrical tube, which is retractile. On 

 cutting this open upon the dotted line (in fig. 6) a cylindrical dart 

 was disclosed, having a spiral structure, but soft and leathery, not 

 as usually calcareous ; along the side of this dart sac (fig. 7) there 

 are numerous strong muscles (m), many of which have their attach- 

 ment on the side of the body wall. The radula (fig. 9) differs from 

 all described by Pilsbry in this group, the teeth are all plain 

 straight sided from the central to margin, the laterals becoming 

 narrower and longer and but slightly curved ; the marginals are 

 very minute unicuspid, only the very last bicuspid. The radula is 

 unusually long, having as many as 146 rows. Stoliczka describes 

 that of Trachia delibrata to be very long with 125 rows. 



The formula is 47. 9. i. 9. 47 or 56. i. 56. 



The jaw (fig. 8) is very soUd, well arched, with some 9 strong 

 broad ribs. 



