27 
2. Vecten lineatiis, PIgavs/ — T he illustration is a poor copy of McCoy’s 
tigiirc. 
3. Aciculopecteu SHbqu'mquelineidiis, Do Koninck.'^ — This author 
described the shell as plano-convex, but mistook the right for the left valve, 
and consequently the nomenclature of the auricles ; on the other hand, he 
correctly indicated the relative dilferenccs between the umbos of the two 
valves. Ilis figure rejAresents a poor cast of the left valve, Avhich Ave 
certainly AAmuld not have recognised had it not been for the description. De 
Koninck describes tAA'^enty-fiA^e primary costie inequidistant from one another 
and a A’ariahle number of subsidiary ribs. 
4. Aviculopeclen sithquinqnelinealiis, Pth. til.^ — A left val\'e Avas 
described from the BoAven River Coal-field. The primary costa; and radiate 
auricles are shoAvn in the figure. 
5. Aviculopecteu hiemalis (Salter), ])iener.'*^ — We have not access to 
Salter’s original figure, hut Dr. Diener’s is suspiciously like some varieties of 
A. suLquinquelineatus, especially in the costation, and tlie \"alves are said to be 
markedly unequal. At the same time, the shell is rather too much expanded 
laterally, the lateral angles extending too far beyond the auricles. 
Prom our specimens we gather the folloAving additional particulars. 
The valves are semi-plano-convex, the right Avalve flat, or nearly so, the left 
convex. The right anterior auricle is smaller than the left anterior, in that 
the lower margin is straight, leaving a sharp and deep hyssal sinus hetAvecn 
it and tlie body of the valve ; the posterior auricles of both valves are similar 
to one another. The anterior and posterior slopes of the left valve are steeply 
inclined, and the umbo of the right vah'e smaller and blunter than that of 
the left. The hinge-plates extend the Avhole length of the dorsal margin, are 
densely grooved Avith fine resilium furroAVS, and are obliquely inclined to the 
general plane of the valves, leaving hetAA’een them a deep transverse gape, 
occupied during life by the resilium. BeloAV the umbo of the right valve is 
visible a very large semicircular and deeply concave chondrophore, concen- 
trically furroAA’ed by a continuation of the resilium furroAvs (PI. XIV, P’ig. 1). 
‘ Plows — Mining Inst. Jouru., 1858, A'l, Pt. 3, p. 4, 3rd fig. from left, top row. 
^ De Koninck -Kecli. Foss. Pal. Nouv.-Galles du Sud, Pt. 3, 1877, p. 152, t. 23, f. 2. 
® Etheridge, Junr. — Proc. E. Phys. Soc. Edinb., 1880, A', p. 2J7, t. 15, f. 52. 
* Diener — Himalayan Fossils (Pal. Ind.), 1897, I, Pt. 4, p. 9, t. 5, f. 10 a and b, 11, 
