14 NOETLING: MARINE FOSSILS FROM MIOCENE, UPPER BURMA.- 



probabilities are that the completion of the anterior part is not in ac- 

 cordance with the actual character of the shell, and that therefore the 

 species from Burma is perhaps identical with that from Cutch, an as- 

 sumption which is well borne out by the character of the posterior 

 side of Tellina exarata. 



Another form closely related is Psammobia uniradiata> Brocc^ 

 which shows exactly the same characters on the posterior side as 

 Tellina hilli; particularly the undulating striae crossing the keelsy 

 which according to Hoernes form one of the chief features of P. 

 uniradiata, are the same as in Tellina hilli ; on the other hand there 

 is no doubt that the anterior side of Tellina hilli is smooth, except 

 some fine striae of growth, while in P. uniradiata the whole surface 

 is covered with sharp horizontal ribs. There exist, however,, 

 close relations between this and a living species. I have before 

 me a species which has been dredged at 125 fathoms in the Bay of 

 Bengal and which has been named Tellina murrayi (?) E. A. Smith r 

 which is very closely related to T. hilli. The general shape and 

 the two keels on the posterior side are the same, but the sculpture 

 is different. In T. murrayi the keels are smooth, and the sculpture 

 is uniform all over the valves; in T. hilli the keels are scaly and 

 the posterior side differs in sculpture from the anterior side by 

 having fine, but sharp horizontal ribs, while the latter only shows 

 irregular striae of growth. However the similarity between the two 

 species is very striking, and T. murrayi may perhaps be a descendant 

 from T. hilli. 



TELLINA KINGI, Spec, nov., Plate III, Fig. 7-7*. 

 All specimens under examination are either fragments or so 

 ill-preserved that the general shape of the shell cannot be made out ; 

 it seems, however, that it has been of an oval shape ; the characters of 

 the sculpture can, however, be satisfactorily ascertained j rather a 

 broad but shallow furrow runs from the beak towards the junction of 

 ventral and posterior margin, which is accompanied on both sides by 

 two moderately strong concave keels. The whole surface is covered 

 with strong regular horizontal ribs, which become rather obscure 

 ( 14 ) 



