402 
It. Butlen Newton — Fbmts from Singapore. 
reference aa fine of the Bpeetes found in tie Singapore Clays, This 
specimen may be also said to resemble some small farms of 
Unicardium. 
Dimension *'—Length U. height 10 mm. 
Collector, —Mr, J. B. Scrivener. 
Asta&te Scttivxyfmr, sp. m>v, (PL XXV, Figs. 11, 12.) 
Shell subquad rata. h lightly convex; umbo anterior; domdline 
slightly oblique; posterior area depressed, sloping, and ungulated 
below ; ventral margin nearly parallel with dorsal; anterior area 
rounded and short. Ornament consisting of from 10-12 nearly 
horizontal costal ribs, obtusely angled on both sides, and separated 
by rather wide siilcuttnne; anterior ooetie crowded and finest in front 
Miauion*.—Fig, 11, length 34, height 11 mm. ; Fig, 12, Length 
11, height 7 min. 
This form is represented by two right valves of different agea, 
the younger showing a lunch finer and more crowded system of 
oca tat (Fig, 12), whilst the older shell (Fig. 11) possesses a bolder 
ami coarser sculpt lire. The lateral angles of the costas present 
a feature of interest in the sculpture which is apparently not known 
among typical astarttform shells, hence it limt been regarded aa 
a new species. In addition it may be mentioned that this species 
shows a certain resemblance in contour and structure to A. inter- 
Hiteala. of Lycett, from the Great Oolite of Mixicimihamptou (see 
Mon. Pul. Soe., 1354, pJ, ix. figs. 14, la, p, 87), 
Collector, —Mr. j, B. Scrii'enor. 
Astarte Guthrie s ere, sp, nov. (PL XXV, Fig, 9,) 
Shall small, sabolliptical, moderately convex; umbo anterior; 
front area short, rounded, slightly excavated bene nth the umbo; 
posterior margin elongate, oblique; ventral border thickened, 
rounded ; sculpture conrinting of about 10 wide, elevated, con men trio 
cost®, bearing minute I mentions, divided by k mouth sulcaMunB of 
nearly equal wtilth, 
/hniKuaiong,—Length 11, height 6 mm, 
This specimen ig embedded In the matrix and exhibits an external 
view of the right valve. The donm-posterior margin is rather 
imperfect, otherwise the specimen is fairly ween and its. ornamentation 
is well displayed. The raised concentric and striated ridges 
divided by the prominent smooth sulcations and without any 
evidence of radial lines, are the chief sculpture ch a rioters of the 
val ve. 
Collector.— Mr. J. B. Scrivener. 
Astabtk Guth at esses, var. nov. (PL XXV, Fig. 10.) 
Shell with similar sculpture to A, GuthrUnais, but of rather 
quadrate form, and considerably less oblique posteriorly. 
Zhnwwriorw.—Length 10, height 7 mm. 
This variety is represented by an external surface of a right valve 
in which the umbo is not preserved, but the excavation beneath is 
well marked. 
Collector. —Mr. J. B. Scrivcrmr. 
