Dr. H. Woodicard — On Fossil Shells, etc., from Sumatra. 497 



Dimensions : — Length 20 mm. ; greatest breadth 10 mm. 

 Formation : — From Grey Tertiary Marl-clay. 



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

 Sumatra. 



40. Oliva pupceformis, H. Woodw. PI. XIII. Fig. 4. 



This is a more attenuated and cylindrical shell than the preceding, 

 with a produced and pointed spire, the columella having only two 

 folds upon it. The aperture of the shell is narrow. Although 

 resembling several small living species, yet upon close comparison 

 it appears to be distinct. 



Dimensions : — Height 18 mm. ; breadth 7 mm. 



In general proportions it agrees very nearly with Sowerby's 

 Oliva pupa, from Soomrow, Cutch (Trans. Geol. Soc. 1840, vol. v. 

 2nd series, pi. xxvi. fig. 32). 



Formation : — From Grey Tertiary Marl-clay. 



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

 Sumatra. 



41. Ancillaria, sp. PI. XIII. Fig. 5. 



This is a narrow cylindrical shell, with moderately wide aperture ; 

 columella with eight folds ; marked by a broad and smooth band at 

 the base ; apex subacute. 



Dimensions : — Height 14 mm. ; breadth 6 mm. 



Formation and Locality : — The same as preceding species. 



42. Terebellum, sp. (cast). PI. XIII. Fig. 6. 



This narrow cylindrical form is destitute of any test, but from its 

 general characters may very well be compared with the Terebellum 

 subidatum, Chemnitz, a species distributed in the Indian Ocean, the 

 Philippines, and the neighbouring seas of China, etc. The spire of 

 the Sumatran fossil, however, is shorter, the sutures are less oblique, 

 and the body- whorl near the spire is rather more tumid than in the 

 recent form. (See Sowerby's Thesaurus Conchyliorum, vol. iii. 1866, 

 pi. 218.) 



Dimensions : — Height 20 mm. ; breadth 5 mm. 



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



Locality : — Island of Nias, Government of West Coast of Sumatra. 



43 Cyprcea, sp. (cast). PI. XIII. Fig. 8a, b. 



This is a smooth and polished cast of a short and very ovate and 

 tumid Cyprwa, which was probably not unlike the Cyprcea Beevii, 

 from Swan River. The spire seems to have been exserted ; outer lip 

 broad and marked by small but numerous teeth ; the inner lip was 

 also denticulated, especially towards the anterior end ; the aperture is 

 narrow near the centre, but expands somewhat towards each extremity. 



Dimensions : — Length of shell 31 mm. ; breadth 21 mm. 



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



Locality : — Government of West Coast of Sumatra. 



44. Cyprcea nucleus, Linn. PI. XIII. Figs. 7 a and b. 



Shell (in living state) white, or reddish-yellow ; ovate ; produced 

 at the extremities, elevated dorsally, irregularly tuberculate, with 

 faint traces of ribs between the tubercles ; base rounded, denticula- 

 tions numerous, the intermediate ones diverging at margin of aperture, 



DECADE II. — VOL. VI. — NO. XI. 32 



