496 Dr. H. Woodward — On Fossil Shells, etc., from Sumatra. 



nearly obsolete. The form I figured as Prenaster excentricus re- 

 sembles the diagram-sketch on your Plate more than any other 

 species that occurs to me now, so that your Sumatran Echinoderm 

 may be an allied form belonging to the genus Prenaster. More than 

 this I cannot say." 



37. Conus Niasensis, H. Woodw. PL XIII. Fig. 1. 



Shell conical-elongate, concentrically-striated, stria? wider apart 

 towards the base of shell and rather more strongly accentuated ; 

 spire conical, apex obtuse, showing about seven volutions, concen- 

 trically striated and crenulated, the outer margins ornamented with 

 a series of flattened tubercles ; aperture narrow. 



Dimensions : — Height 15 millimetres ; breadth at widest part of 

 shell 6| mm. 



The ornamentation of the upper portion of the whorls around the 

 apex presents a close agreement with Conus acutangulus, Chemn., as 

 figured by K. Martin from Java (Die Tertiarschichten auf Java, p. 11, 

 tab. ii. fig. 2) ; but the apex of this species is more regularly conical 

 and the shell itself is more robust. 



Dr. Bottger also figures a cone under the name of Conus gracili- 

 spira, Bottg., from Pengaron, Borneo (p. 18, taf. ii. fig. 13, 14 a, 

 and b, Palasontographica, 1875) ; but the apex is too truncated, and 

 the specimen, being a cast, cannot be compared certainly with our 

 fossil. 



Formation : — Tertiary Grey Marl. 



Locality : — Hiligara, Island of Nias, Government of the West Coast 

 of Sumatra. 



38. Oliva mustelina ? Lamarck. PL XIII. Fig. 2 a, b. 



The specimen figured consists only of the body- whorl, the apex 

 being wanting ; the shell is much eroded, and it would be difficult 

 of identification, but it presents a great similarity to the Oliva 

 mustelina, Lamarck, which is commonly met with on the coast of 

 Japan, the Philippines, and Singapore. 



The following is the description of Oliva mustelina (from 

 Sowerby's Thesaurus Conchyliorum (1871), part xxx. p. 22). 



" Shell oblong-cylindrical, subtruncated at both ends, thick; colour 

 greyish yellow, marked with obliquely-longitudinal undulating 

 lines ; spire short, broad, suture acute, punctated ; columella plicated 

 throughout, terminating posteriorly in a thick elevated callus, 

 having a few very strongly-oblique plicae in front ; aperture violet 

 within ; lip thick, elevated behind, interior and exterior smooth." 



Formation : — (Sub-fossil ?) 



Locality : — Government of the West Coast of Sumatra. 



39. Oliva pseudoaustralis, H. Woodw. PL XIII. Fig. 3. 



This is a smooth ovate shell with a conical spire, and having a 

 strongly ribbed columella which is thickened towards the base. 

 It appears to be allied to the Oliva australis of Duclos, but it is 

 rather shorter, and has a more conical spire. 



This species may also be compared with the Oliva Javana, K. 

 Martin, (op. cit.) tab. iii. fig. 8 and 8a, but the spire of this latter 

 species is more acute. 



