Dr. H. Woodward — On Fossil Shells, etc., from Sumatra. 443 



22. Pema, sp. PI. XL Fig. 4. 



Two fragments showing the characteristic hinge-line and nacreous 

 interior. 



Formation and Locality : — The same as the preceding. 



23. Pecten asper, Sowerby (non Lamarck). PL XL Figs. 5 and 6. 

 1847, Thesaurus Conch., vol. i. p. 50. 



Shell inequivalve, equilateral, ears equal, minutely serrately 

 striated ; left valve flat, a little raised towards the umbones, rayed 

 with eighteen rather flatly two-angled ribs ; ribs and interstices con- 

 centrically striated, dotted everywhere with pale red ; right valve 

 convex, rayed with nineteen rather smooth ribs ; ribs white, sparingly 

 lineated with red ; interstices red towards the margin. 



Dimensions of flat valve : — Breadth 33 mm., height 32 mm. 



Locality and formation : — The same as the foregoing species. 



24. Aspergillum sp., Lamarck. PI. XL Fig. 7. 



Shell with two equal minute ovate valves, mostly angled posteriorly, 

 soldered into the lower wall of a long sheath ; sheath at the upper 

 part open, sometimes attenuated, with the edge simple, sometimes 

 nearly straight, with the edge rather largely two to eight times fur- 

 belowed, at the lower part club-shaped, closed by a perforated, 

 generally tubularly, fringed disc. 



This shell is probably referable to the recent A. Javanum, sp. 

 Brug., or A. spar sum, Sowerby, from Java. 



Formation and Locality ; — The same as the preceding. 



25. Zoanthaeia. — Acanthocyathus, sp. PI. XL Fig. 8. 

 Corallum turbinate, compressed towards the base, and broadly 



attached ; calyx elliptical ; costse slightly prominent, extending to the 

 base and minutely granulated : columella elongated and irregular ; 

 principal septa 22-24 in number, their surfaces covered by minute 

 styliform processes or synapticula?. 



This coral agrees closely with the specimens of the living Acan- 

 thocyathus Grayi, in the British Museum, from the seas of Australia 

 and Japan, but the fossil examples have not the prominent lateral 

 shoots seen in that species. 



Formation : — From grey sandy-clay rich in Gasteropoda, Tertiary. 



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



26. Montlivaltia, sp. PL XL Figs. 9 and 10. 



Corallum subturbinate, slightly attached, epitheca moderately 

 thick ; calyx subelliptical, fossa moderately deep, with about 50 

 septa, the majority of which reach the centre ; upper surface of septa 

 imbricated. 



Fig. 9 a, b, appears to be only a more conical variety of the same 

 species and its fractured state exposes the dissepiments connecting 

 the septa (see Fig. 9 b). 



Formation : — Tertiary Clay-marls. 



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



27. Fungia, sp. PL XL Fig. 11 (under-side). 



A nearly flat discoidal form with minute projecting point of 

 attachment, as seen in young examples of the common recent Fungia. 

 Costa? minute, numerous, extending from centre to circumference. 



