22 NOETLING : MARINE FOSSILS FROM MIOCENE, UPPER BURMA. 



SILIQUARIA, Sp. 



The only specimen which belongs to this genus is too ill-preserved 

 to permit a specific identification ; so far as can be ascertained it 

 consisted of five irregular whorls which are covered with numerous 

 but somewhat irregular longitudinal striae, which are so close to- 

 gether that a kind of shaly sculpture is produced ; the slit on the 

 upper side is ill-seen. 



Locality, — Rare at Yenangyat. 



Remarks, — If any comparison can be drawn from this specimen, 

 it may be said that it closely resembles Siltquaria granti, Sow., from 

 the Nari group, although this species is apparently different by 

 having more inflated whorls. 



CALYPTREA RUGOSA, Spec, nov., Plate V, Fig. 5— 5k 

 This pretty little shell is conical, having a nearly circular circum- 

 ference ; the apex is slightly sub-central ; the whorls are ventricose 

 and except for some irregular striae of growth, covered with fine, 

 short transverse striae which give the surface a somewhat plicate 

 appearance. 



Locality.— Rather rare at Minbu and Yenangyat. 



NATICA OBSCURA, Sow., Plate V, Fig. 6— 7 b. 



1840. Natica obscura, Sowerby, Transact., Geol. Soc. of London, 2nd sen, vol. V, plate 

 XXVI, fig. 2. 



The shell is globular, consisting of five whorls, of which the first 

 four form the low, depressed spire ; the suture is sharp and well 

 defined ; the surface is smooth, except for some occasional striae of 

 growth ; a very shallow depression runs just alongside the suture on 

 the upper end of the whorls. Outer lip sharp ; inner lip thick and 

 callous, only partly covering the deep umbilicus. 



Locality**— Common at Minbu and Yenangyat. 



Remarks. — This species is easily distinguished from Natica 

 rallosa by a little higher spire, and by the shallow depression running 

 alongside the suture on the upper part of the whorls ; the striae 



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