Horizon and Localities. — M. Strzelecki found it at lllawarra; Mr. 
W. B. Clarke at Mount Gimbela, in a brownish sandstone ; and Mr. McCoy 
says it is abundant in the sandstone of Darlington, Wollongong, and Glendon. 
Sanuuinolites tenisoni, L. G. de Koninck} 
PI. XVII, Pig. 5. 
This is a small, oblong, elliptical shell, very nearly twice as long as 
broad, and with the hinge-line and ventral margin sub -parallel. Its valves 
are rather shallow, and slightly depressed at the anal side. The hinge-line is 
straight, and occupies nearly two-thirds of the whole length of the shell ; 
the ventral margin is slightly arched, and the valves are rather broader 
towards their j)osterior than towards their anterior extremity. The beaks 
are small, and placed anteriorly at a distance of six millimetres from the 
exterior margin. The surface is ornamented with ten or twelve sub- 
equidistant, concentric, wrinkles, all alike, and a little laminated. The valves 
apparently are not gaping. 
Dimensions. — The length is thirty-eight, the breadth eighteen, and the 
thickness six, millimetres. 
Relations and Differences .—110. general form this species resembles 
S. plicattis, Portlock, but it differs in breadth, and in the arrangement and 
small number of its concentric folds. It is possibly identical with Modiola 
squamifera, J. Phillips, which evidently does not belong to the genus in which 
it is placed ; unfortunately I have had no opportunity of comparing it with 
this species, which seems to be rather rare, and which I have not seen in any 
collection I have visited. 
Horizon and Localities. — A single specimen was found in an argil- 
laceous, olive-coloured, limestone at Burragood. It was assoeiated with 
Rrodiict'us seniireticulatus, Martin, and with numerous fragments of Crinoid 
stems. It is at the desire of Mr. W. B. Clarke that I have dedicated this 
species to Mr. J. E. Tenison Woods, who has given himself successfully to the 
study of Australian geology. 
* [Ten. Woods, Journ. R. Soc. N.S. Wales, 1882 [1883], XVI, p. 145, t. 10, f. 9 ; Waagen, Salt Range 
Fossils (Pal. ludica), 1891, IV, Pt. 1, p. 128, t. 5, f. 6a, b, c.— W.S.D.] 
