FOSSILS OF NEW SOUTH WALES. 691 
13 inches ; height ;4%, L.; thickness 53, L.; apical angle of cast 105°; of shell about 
115°.—Plate 4, fig. 4 a, 6, views of cast, natural size; c, larger anterior muscular im- 
pression, with commencement of palleal; ¢, smaller anterior, 
Wollongong Point, District of Ilawarra., 
This species is remarkable for being a third longer than high. It has the lateral sur- 
face of the cast, from the beak downward, strongly flattened, and between this area and 
the muscular impression, the surface (which is of the same width as the flattened area) is 
also flattened or a little concave. The palleal impression is faint. 
Astartila transversa, Exped. Foss., Amer. Jour. Sci., ii. Ser., iv. 155. 
28. AsTarTILA? corpuLENTA (Dana).—Ventricose, oblong, a little inequilateral, sub- 
elliptical, prolonged in front, inferior margin arcuate; umbos elevated. Surface con- 
centrically subrugose.—Length 12 inches; height 5°; L.; thickness 4; L.; apical 
angle about 120°.—Plate 3, figs. 3 a, 6, c. 
District of Hlawarra. 
This species is referred provisionally to this place, as the characters exhibited do not 
satisfy us of its true genus. 
29. Carpinita? REcTA (Dana).—Very inequilateral, narrowing behind, length 23 times 
the height ; dorsal margin a little arcuate, inferior margin straight at middle; sides not 
flattened, marked with concentric strie and faint radiations ; palleal and posterior muscu- 
lar impressions, scarcely distinguishable ; anterior muscular impressions strong ; cardinal 
area of cast neatly flattened and linear, straight and elongated nearly to posterior margin, 
with a subacute carinate limit——Length 2 inches ; height 45, L. ; thickness yoo L.; apical 
angle 125°,—Plate 4, fig. 5, natural size, in part a cast; 5 @, cast of the same, imperfect 
in front ; 0, profile of cast. 
District of [lawarra. 
This, and the three following species, have the general aspect and the characters 
nearly of the Cardinize of Agassiz, They are all oblong transverse, with the sides more 
or less compressed, or concave at times, the dorsal margin arcuate or nearly straight, 
and the lower margin straight, or a little concave at middle. The beak projects but 
slightly. The cardinal area is nearly wanting; in the cast, it is narrow linear, more 
regularly so than in the described Cardinize. ‘The front of the cast is truncate in all; the 
smaller muscular impression is oblong linear; the truncate front surface extends down- 
ward so as to separate the larger muscular impression from the medial front line. The 
palleal impression is nearly parallel with the margin, and abruptly stops just before 
reaching the anterior muscle. The ligament is external and rather short. The surface 
is usually more or less faintly radiated, the lines radiating mostly from the upper and 
anterior part of beak, (and not from a point posterior to the beak, as represented in 
Morris’s figure of the costata.) In the cast, the lateral surface from the beak obliquely 
backward and downward, is flattened or somewhat concave, and faint radiations, corre- 
sponding to those of the exterior, are also traceable. The shells are closed posteriorly. 
The C. recta is distinguished by its form and faint palleal impressions ; also by the flat 
linear cardinal area of the cast, with its subacute carinate limit, and its prominent car- 
dinal margin, The posterior margin is arcuate, and the front obliquely truncate from 
above, but rounded below. ‘The striee of the surface are slightly undulated by the radia- 
tions. The surface of the cast is very smooth, and marked with faint radiations, ‘The 
