40 NOETLING: MARINE FOSSILS FROM MIOCENE, UPPER BURMA. 



served ; except one fragment belonging to the lower part of the shell, 

 the rest consists only of parts of the earlier whorls ; these are high, 

 flat, and divided by a false suture which runs in about frds of the 

 height from the base ; the surface is covered with sharp longitudinal 

 ribs, bent in an S-shaped curve and generally more or less interrupt- 

 ed by the false suture. On the later whorls this ornamentation disap- 

 pears, and the ribs are represented by fine, closely set S-shaped lines. 



Locality. — Pretty common at Minbu ; rare at Yenangyat. 



Remarks. — Although found only in fragments, I have not the 

 slightest doubt that they represent this well-known species from the 

 Miocene and Pliocene ; the specimens from Burma agree even in the 

 slightest details with Terebra fuscata. A living relative is Terebra 

 anomala^ Gray., from the Madras coast, although the latter represents 

 a distinct species. 



PLEUROTOMA VOYSESI, d'Archiac, Plate IX, Fig. 5—53. 



1853. Pleurotoma Voysesi, d'Archiac and Haime, Desc. des Anim.foss. du groupe 



nummulitique de V Inde, page 305, pi. XXIX, fig. 10* 



The specimens I collected at Minbu show, although they are in 

 rather a fragmentary state, none of them being complete, the dis- 

 tinctive features of the above species so well that I do not hesitate 

 for a moment to identify them with this species. The whorls are 

 strongly careened in the middle and separated by an indistinctly 

 marked suture, each whorl involving the preceding one, nearly up 

 to the keel. Above the keel the whorls are deeply concave, below it 

 slightly convex. Below the suture runs a slightly less marked ridge 

 which is indistinctly granulated. The keel itself is plicated by very 

 regular short ribs which extend over the lower half of the whorl in the 

 shape of fine longitudinal striae, which frequently bifurcate. Very fine 

 revolving striae cover the whorls, and are particularly well expressed 

 on the lower half of the body- whorl, where they become a little granular 

 owing to the crossing with the longitudinal striae. 



Locality, — Minbu. 



( 40 ) 



