20 NOETLING: MARINE FOSSILS FROM MIOCENE, UPPER BURMA. 



separated by broad interstices ; rather strong revolving lines run 

 across ribs and interstices, thereby producing a kind of reticulated 

 ornamentation. 



Locality. — Rare at Minbu. 



Remarks. — Although the two specimens under examination are 

 rather incomplete, the ornamentation of the surface can be well dis- 

 tinguished, and from the characters exhibited we must consider this 

 form a new species. The free whorls, together with the ornamenta- 

 tion, distinguish this species easily from others. 



SCALARIA SUBTENUILAMELLA, d'Archiac, Plate, Fig. 3—30. 

 1853. Scalaria subtenuilamella, d'Archiac and Haime, Descr. des Anim. foss. du 



groupe nummulitique de l'Inde, page_286, plate 



XXVI, fig. 9 a. 



Although only one specimen, and even this in a fragmentary 

 condition, has been found, I think that it is sufficient for identification; 

 four whorls are preserved, which show an angular section and are 

 separated by a deep suture. The angular section is produced by 

 three revolving keels, of which, however, only the lowest one is sharply 

 defined, the next one following is only slightly marked, while the 

 third one is stronger; the surface slopes from the third keel towards 

 the suture, between the third and second it is nearly flat and slopes 

 again from the second to the first; as the first keel always coincides 

 with the suture, it is only well seen on the last whorl; the surface is 

 covered with regular sharp longitudinal ribs, obliquely inclined for- 

 wards, which are equidistant and seem to continue from one whorl to 

 the other; they are slightly stronger in the middle than towards both 

 ends ; although very indistinctly seen, there is no doubt that on the 

 base of each whorl ribs and interstices were covered with very fine 

 regular revolving lines. 



Locality. — Rare at Minbu. 



Remarks.— -I had some hesitation identifying the specimen from 

 Burma with the Indian species, because it seemed to me that they 

 differed somewhat in general shape ; but when comparing the details 

 of ornamentation, I could not help noticing that they are very much 

 the same, although there seems to ex ? st some difference which must 



( 20 > 



