546 Dr. H. Woodward — On Fossil Shells from Sumatra. 



I beg leave to dedicate this interesting Tertiary representative 

 of a Mesozoic genus, now almost extinct, to my valued friend and 

 colleague Prof. John Morris, M.A., F.G.S., whose stores of palason- 

 tological knowledge are always so freely accessible to all bis scientific 

 friends, and who bas rendered me much valuable assistance in 

 preparing the present memoir. 



Formation : — Tertiary Clay -Marl. 



Locality : — Government of tbe West Coast of Sumatra. 



77. Melania subfossilis, H. Woodw. PI. XV. Fig. 8, a, b. 



Sbell fusiform, surface smootb, with fine longitudinal striee ; 

 whorls 7 in number, spotted around the suture with brown spots ; 

 body-wborl with occasional brown streaks ; earliest volutions of spire 

 distinctly costated ; suture strongly marked; lower part of body-wborl 

 distinctly lirated ; aperture entire, oval, pointed behind, outer lip thin. 



This shell, like the Neritina already noticed, has all the appearance 

 of having been living at a very recent date. 



It is probably near to the Melania (Aulacostoma) lesvissima. 



Dimensions : — Height 12 mm. ; breadth 7 mm. 



Formation : — (Subfossil ?) Tertiary. 



Locality : — Government of the West Coast of Sumatra. 



78. Melania rivularis f Philippi. PI. XV. Fig. 9, a, b. 



The following is Pbilippi's description of tbis species : — Sbell 

 turrited, greenish ; apex decollated, whorls 7, convex, suture strongly 

 marked ; transversely striated, the upper whorls marked with red 

 lines, the middle series with transverse spots below the suture ; 

 aperture ovate-oblong, acute above, base expanded ; lip near the 

 base somewhat produced (length 20 mm. ; breadth, 6 mm.), (Abbil- 

 dungen und Beschreibungen Concbylien von Dr. E. A. Philippi, 

 band. ii. lief. 6, Cassel, 1847, 4to.) 



The shell here figured agrees very well indeed with Philippi's 

 description of Melania rivularis. but differs somewhat from his 

 figure, which represents the whorls a trifle less convex and the 

 aperture a little more elongated and produced at the base. M. rivu- 

 laris is a Javanese form. M. fontinalis, of Philippi, is another 

 closely-related species, and in fact (as suggested by the author him- 

 self) may probably only be a local variety of the preceding species. 

 It is found in the aqueducts in the Island of Pulo Pinang. 



Dimensions : — Height 16 mm. ; breadth 5 mm. 



Formation : — (Subfossil ?) Tertiary. 



Locality : — Government of the West Coast of Sumatra. 



79. Melania ? (cast). PI. XV. Fig. 10. 



This specimen makes us acquainted with an elongated cast show- 

 ing six convex volutions carinated near the suture ; none of the 

 shell is preserved save the inner layer. 



This cast might be compared with that of the Turritella Su- 

 bathooensis, D'Arch. (D'Arch. and Haime, Numm. Foss. de lTnde, 

 t. 28, fig. 1), with which it agrees in general form. 



If this be the internal cast of a Melania, of which there seems 

 little doubt, it affords some grounds for assuming that the very 



