HEMIPLECTA. 293 



13 mm. Another specimen measures 24 x 21 x 10| ; an immature 

 shell from Mergui 27 X 23| x 13. 



Hob. Mergui (Philippi), Tanglaw, Teuasserirn valley ; Ataran 

 Valley (Theobald) ; top of Muleyit (Fea). 



The type described by Philippi appears to have been immature, 

 as was certainly the shell figured by Pfeiffer in Mart. & Chemn. 

 Conch.-Cab. 2nd ed. no. 687, pi. 110, figs. 1-3. The two specimens 

 obtained by Theobald from Ataran, now in the British Museum, 

 are probably the first adult shells described. 



This species is distinguished from //. textrina by much coarser 

 sculpture, descending last whorl, and more oblique and small 

 aperture. 



463. Hemiplecta ? gordoniae, Bs. (Helix) A. M. N. H. (3) xi, 1863, 



p. 87 ; Pfr. (Helix) Mon. Hel. v, 1868, p. 402 ; H. $ T. (Helix) 

 C. I. 1876, pi. 27, fig. 42. 



Shell perforate, orbiculate, depressed, rather thin, whitish, above 

 obliquely striated on inner whorls, plicate on outer whorls, beneath 

 smooth, radiately striated, and decussated by subdistant concentric 

 impressed lines; spire almost flat, apex slightly raised, obtuse, 

 suture impressed; whorls 7, slowly increasing, slightly convex, 

 outer whorls concave outside near suture, the last sharply and 

 coinpressedly keeled, not descending; aperture nearly vertical, 

 broad, angularly lunate ; peristome obtuse, white, slightly thick- 

 ened inside, basal margin arcuate, columellar short, slightly reflected 

 at perforation. 



Major diam. 33, min. 30, axis 11 mm. 



Hab. Mdoung Toung, Ataran Valley, near Moulmein. 



The affinities of this species are very doubtful, and it may belong 

 to the Helicidae. 



464. Hemiplecta ? auriettae, Tapp. Canefri, Nam'na (Macrochlamys), 



Ann. Mus. Civ. Gen. xxvii, 1889, p. 318, pi. 8, figs. 4, 5, 6. 



Shell narrowly timbilicated, suborbiculately depressed, sub- 

 angulate at the periphery, rather thin, closely and strongly decus- 

 sated above, silky, olivaceous, glossy beneath, paler, and radiately 

 striated ; spire but little raised, apex obtuse ; whorls 6 j, slowly 

 increasing, the last not descending, slightly flattened at the base ; 

 aperture slightly oblique, regularly ovately lunate; peristome 

 simple, acute, margins remote, columellar oblique, briefly reflected 

 over the umbilicus above at its insertion. 



Major diam. 24, min. 21, height 10^ mm. 



ffab. Muleyit, Tenasserim, at about 6000 feet elevation (Fea, 

 Beddome). 



The suture is lightly impressed and not as represented in the 

 figure. The sculpture resembles that of Euplecta indica. 



The affinities of the species are doubtful ; it may belong to the 

 Helicidae. 



