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



callous, nonumbilicate, very faintly striated ; columella solid, base 

 of shell somewhat flattened. 



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



This shell presents some resemblance to the Monodonta mamilla of 

 Andrzejowski (figured by Homes in Fossilen Mollusken des Tertiar 

 Beckens von Wien, p. 438, t. 44, fig. 8), but the whorls are not quite 

 so inflated in appearance as in our Sumatran form. 



Formation and Locality : — "With the preceding species. 



65. Solarium Javanum? Martin. PI. XIV. Fig. 15. 



Shell orbicular, depressed ; umbilicus wide and deep ; the upper 

 surface of each whorl encircled by about four sets of spiral moniliform 

 lira?, margin of umbilicus strongly corrugated. So far as the very 

 imperfect state of this specimen permits us to form a comparison, 

 we have little doubt in referring it to the Solarium Javanum of 

 Martin (Die Tertiarscbichten auf Java, p. 74, tab. xiii. figs. 2, 2a), 

 but the Sumatran shell is much smaller. 



Formation : — In bluish Tertiary Clay-marl. 



Locality : — Government of the West Coast of Sumatra. 



66. Turbo Martinianus, H. Woodw. PL XIV. Fig. 16a, b. 



Shell orbicular, depressed ; whorls 4 to 5 in number, convex, trans- 

 versely finely sulcated, sulci regular, very faintly and obliquely 

 striated between tbe sulcations; base of last whorl somewhat flat- 

 tened, umbilicus closed in the adult; in specimens in which the 

 callous has been removed by decortication, the shell is seen to be 

 deeply and widely umbilicated, the sides of the umbilicus being 

 striated within ; aperture of shell rounded. 



This shell agrees closely in form and general ornamentation with 

 the Turbo planorbidaris of Deshayes, from the Calcaire Grossier 

 Houdan (see Descrip. des Coq. Foss. des Env. de Paris, 1824, tome ii. 

 p. 258, pi. 33, figs. 19-22), but the French specimen is much smaller 

 and the umbilicus is not closed. 



The French specimen is only 3 mm. in height and six in diameter. 

 The Sumatran shell is 11 mm. in height, and 15 mm. in diameter. 



I have named this specimen after Dr. K. Martin, whose fine folio 

 memoir, with its excellent plates, Die Tertiarscbichten auf Java 

 (1879), now in course of publication, promises, when completed, 1 to 

 be of great value to palaeontologists. 



Formation : — In whitish Tertiary Clay-marl. 



Locality : — Government of the West Coast of Sumatra. 



67. Turritella, sp. PI. XIV. Fig. 17. 



All that is preserved to us of this specimen is the upper part of 

 the spire of a Turritella, very near to the group of Turritella imbri- 

 cataria, in which the suture is very indistinctly marked (much less so 

 than the artist has represented in the Plate), and the volutions are 

 ornamented with a series of transverse ridges alternately larger and 

 smaller, the latter being more numerous than the former. 



Formation : — In bluish-grey Tertiary Clay-marl. 



Locality : — Government of the West Coast of Sumatra. 



1 Part I. containing the Univalves, with fourteen plates, has already appeared 

 (Leiden, E. J. Brill, 1879, pp. 94, folio). 



