iu Builen Nmtm—Fusils from Singapore. 489 
them from the shale and sarnie Lone of Upper Sarawak anti Santuboug ’* 
[Borneo], 1 
Description of the Fouifs, 
Tim matrix containing the fossils m a light drab-colotired compact 
day, varying slightly in tint and particularly soft to tin) touch, 
marking everything as if it were chalk, although according to the 
AOtJ test no calcareous constituents are present. Dr, ft, T. IVior, 
of the British Museum, who lias examined the material, has detected 
some minute particles of mltca entering into its structure. 
The specimens herewithdes on bed ami figured have been mainly 
collected by Mr, John B. Scrivenor, although a aecoud series from 
the same locality ami beds was subsequently furnished to the 
writer by Dr, R, FIomt&cli t of the ILtftta* Museum, i3mgapore t three 
of which are represented on the Plate by Figs, 3, 4, and 17. 
Through the good services of both Mr. Seri venor and Dr, Hun it sob 
the specimens selected for illustration have been presented to llm 
British Museum. A word of praise should be extended to the 
artist, Mr. A, H, Satiric, for the excellent drawings he has constructed 
from obscure and difficult material, and which, thanks to the 
collotype process, have been satisfactorily reproduced on the Plate. 
LAMELLIBKANCHJA, 
CuCOLL^EA ScRlVBNOftl, sp, nov. (PL XXV, Fig, 13,) 
Shell small, Cora pressed, inequilateral, aubqu&drato, oblique; 
umbo very anterior ; dorsal margin horizontal, short; anterior 
area short, deep, obliquely and roundly truncated ; posterior region 
wide, produced, rounded, and hearing an elongate oblique depression, 
with nn angulation at the posterior end of the hinge-linn ; ventral 
margin nearly parallel with dorsal line; ornamentation consisting 
of extremely fine concentric growth-lines crossed by a series of 
delicate radial s trial ions. 
DitTieiifliflMS.—Length 13, height 7 mm, 
The specimen referred to this form is a small, rather compressed 
right valve, embedded in the rock, and, like the other specimens from 
this locality, only showing external characters. It appears to differ 
from previously described forms of this genus by its very inequi¬ 
lateral character, the umbo being within a small distance of the 
anterior margin, and the relatively lung and narrow posterior 
depression, 'I M e sculpture markings are obscure, but whan properly 
shaded the valve shows decussating et nations. 
Collector. —Mr. J. B. Scrivener. 
1 These Bortifiu Beds hare been examm*! nittl reprted upon hr Mr, }<,hn H, 
Scrivener, and tlje results i^ued in a Government pupor [Jo. ft) imbliihoC at Kurda 
Lumpur by the Guolagieal Repsurtmirist of the Federated MaJav States <m the 
19th January, J905, unlit h-d “A Report on the Geology of tha Uusidumy 
i?;ira wiik, iiti.il of this Sidogg District, Uoniei}, with special reference to tbu qc*-u mulct 
of Gobi and Coal,” # 
