280 ZONITID.^. 



Hah. Tenasserim Valley, Therapon Hill {Theobald)-, Mergui 

 Archipelago {Anderson). Nevill adds Pegu, but evidently in error. 



Animal not known. No fresh specimen is available, and it is 

 uncertain whether microscopic striatiou occurs. A large shell 

 measures 16, 144, and 8| mm. 



450. Taphrospira compluvialis, Blf. (Nanina) J. A. S. B. 1865, 2, 

 p. G6; Pfr. (Helix) Mon. Hel. v, 1868, p. 103; Blf. P. Z. S. 1904, 

 ii, p. 442, pi. 25, lig. 4. 



Shell perforate, subglobosely depressed, thin, pale horny, 

 translucent, with very fine, close, microscopic, longitudinal striation 

 above and below ; spire very low, suture deeply and broadly 

 canaliculate ; whorls 4|, sharply angulate above at edge of sutural 

 groove, the last descending somewhat towards the mouth, rounded, 

 at the periphery and convex beneath ; aperture oblique, roundly 

 lunate, about as high as broad, angular and emargiuate above at 

 the suture ; peristome thin, scarcely sinuate, columellar margin 

 much curved, expanded, vertical, and more broadly reflected above. 



Major diam. 10, min. 9, height 6| mm. 



Hah. Arakan Hills, west side. 



Distinguished from T. convaUata by fewer whorls, much broader 

 sutural channel, more oblique and rounder aperture, &c. The 

 animal is very dark in colour, and resembles Macrochlamys 

 generally, but its anatomy has not been examined. 



451. Taphrospira excavata, Blf. P. Z. S. 1904, ii, p. 441, pi. 25, fig. 3. 

 Helix compluvialis, H. 8)- T. C. I. 1876, pi. 88, tigs. 1, 4; ^^evm 



(Nanina), Iland-l. i, 1878, p. 27, pt. : 7icc Naniua compluvialis, 

 Blf. 1865. 



Shell similar to that of T. compluvialis, but larger and more 

 globose, the microscopic longitudinal strise on the Avhorls are 

 farther apart and shallower. The aperture is large and rouud and 

 the columellar margin only expanded at the perforation, the mouth 

 is less oblique than in T. compluvialis and there is little or no 

 descent of the last whorl. Whorls 5. 



Major diam. 15, min. 13, height 9 mm. 



Hah. North Cachai', Asix\\x {Godiuin- Austen); also Khasi Hills 

 and Assam {Nevill). 



452. Taphrospira bathycharax, Bs. MS.-. Theob. Cat. p. 17 (no 



description) ; Gochvin-Avsten, A. M. A. H. (6) ii, 1888, p. 56 ; 

 id. P. Z. S. 1895, p. 441 ; Fulton, Jour. Mai. x, p. 99 (1903). 

 Macrochlamys subconvallata, Fulton, I. c. 



Resembles T. compluvialis, but is much more depressed. Shell 

 perforate, depressed, thin, brownish horny, polished, very finely 

 and closely longitudinally striated above and below ; spire 

 very low, suture broadly canaliculate ; whorls 5-5|, the last not 



