﻿Yol. 64.] GEOLOGY OF BUEMA. 637 



Pamily Myid^. 



CoEBULA HAEPA, D'Aichiac & Haime. 



1853. Corbula liarpa, D'Archiac & Haime, ' Description des Animaux Fossiles du 

 Groupe Nummulitique de I'lnde ' p. 236 & pi. xvi, figs. 8-9. 



Description. — Shell small, trigonal, inequivalve, somewhat 

 inequilateral. Right valve larger, anteriorly truncate, with in- 

 dented lunule, extended and gaping behind. Marked posterior 

 keel, extending from the incurved slightly-prosogyrous beaks to the 

 postero-ventral corner. Surface with numerous thick rounded ribs, 

 very regularly placed, and separated by deep interstices of about 

 the same width. Left valve smaller ; posterior keel less marked ; 

 and without the regular ribs, the only ornamentation consisting of 

 growth-lines. 



Locality. — A mile south-east of Magyisan (Minbu district). 



Gasteropoda. 



Family Naticid^. 

 IPTatica sp. 



A fragmentary specimen of a small species, with whorls flattened 

 posteriorly as in iSfatica obscura, J. de C. Sowerby,^ already de- 

 scribed from the Miocene of Burma ^ ; it may possibly be identical 

 with that form. 



Locality. — 2 miles south by east of Magyisan (Minbu district). 



Natica (Ampullii^a) spheeica (?) Deshayes. 



1829, Natica spherica, Deshayes, ' Description des Coquilles Fossiles des Environs 

 de Paris' vol. ii, p. 176 & pi. xx, figs. 14-15. 



Description. — Shell of moderate size, globose, with a prominent 

 spire and large body-whorl. Spire of five rounded whorls, suture 

 slightly canaliculate. The body-whorl is somewhat angular, though 

 not noticeably so, and smooth save for transverse striations which 

 are stronger towards the aperture. Inner lip callous and reflected. 



Remarks. — There is an unusually-extensive callosity in the 

 specimen, which covers the whole of the columella ; but in other 

 respects it very closely resembles the French species. 



Locality. — Yengadin choung, 2 miles south by east of Magyisan 

 (Minbu district). 



Natica (Ampullina) geossa, Deshayes. (PI. LVI, figs. 3 & 4.) 



1866. Natica grossa, Deshayes, 'Description des Animaux sans Vertfebres decouverts 

 dans le Bassin de Paris ' vol. iii, p. 65 & pi. Ixx, figs. 24-26. 



Description. — Shell large, robust, oval. Spire elevated, of 

 five whorls, each slightly angular from posterior flattening ; body- 



1 Trans. Geol. Sec. ser. 2, vol. v, pt. ii (1840) p. 328 & pi. xxvi, fig. 2. 



2 F. Ncetling, Pal. Ind. n. s. vol. i, no. 3 (1901) p. 284 & pi. xix, figs. 2-3. 



2u2 



