Br. H. Woodward — On Fossil Shells from Sumatra. 543 



68. Cerithium, sp. PL XIV. Fig. 18. 



This is a portion of the spire only of a very much waterworn shell, 

 belonging to the group of Cerithium mutabile, showing the suture 

 bordered on each side by a line of tubercles both above and below, 

 with one or more intermediate striae. It may be compared with 

 the Cerithium Hellii of D'Arch. (Foss. Numm. de lTnde, t. 29, fig. 1). 



Formation and Locality : — Found with the above. 



69. Strombus Sumatranus, H. Woodw. (cast). PI. XIV. Fig. 19. 

 This specimen is near to, but is not to be identified with the 



Strombus Javanua (also a cast), figured and described by Dr. K. 

 Martin (1879, in Die Tertiarschichten auf Java, p. 47, tab. ix. fig. 

 2), from Java. It is the cast of a rather ventricose shell, with a 

 slightly produced and costated spire ; aperture long, outer lip broadly 

 expanded, ear-shaped, corrugated within, and produced posteriorly 

 into a rounded lobe rising above and separate from the penultimate 

 whorl, notched at the anterior extremity ; inner lip striated. 



In the S. Javanus the outer lip is semicircular and shorter pos- 

 teriorly, and the spire, which is more produced, numbering about 6 

 whorls, is smooth. 



Dimensions : — Height 25 mm. ; breadth 19 mm. 



Formation : — In light-coloured Tertiary Clay-marl. 



Localitij : — Government of the West Coast of Sumatra. 



70. Delphinula fossilis ? K. Martin. PI. XV. Fig. la, b. 



Shell orbicular, depressed ; whorls few, angulated distantly and 

 obliquely undulated or costated above, bordered by about 10 spines 

 on the angle of the body-whorl ; lirated and transversely striated 

 beneath ; peristome continuous, umbilicus open, aperture round, 

 internally nacreous. 



Dimensions : — Height 25 millimetres ; breadth 35 mm. 



The nearest recent form to this species appears to be the Delphi- 

 nula sphcera, of Kiener. It agrees with this shell in general outline 

 and in the swollen undulations on the upper flattened surface of the 

 whorls; but may be distinguished from it by the difference of 

 character in the spines along the superior angle of the volutions, 

 which in D. sphcera are very greatly produced, becoming quite 

 branch-like, whilst in the Sumatran fossil they are quite short and 

 much .compressed, resembling in this respect, to some extent, D. 

 aculeata, Keeve, an inhabitant of the seas around the Philippine 

 Islands. 



Our Sumatran shell also closely resembles, in general appearance, 

 the D. fossilis of Martin from Java (Die Tertiarschichten auf Java, 

 1879, tab. xiii. fig. 4) ; but the transverse ridges on the last whorl 

 are rather more prominent on our shell than on the Javan fossil, 

 which is, unfortunately, only represented by a broken specimen, so 

 that we cannot fully compare it with this species. In our specimen 

 the longitudinal costae on the upper surface of the whorls are also 

 somewhat more prominent than in D. fossilis. 



Formation : — In white Tertiary Clay-marl. 



Locality : — Government of the West Coast of Sumatra. 



