298 Mr. F. M'Coy on the Fossil Botany and Zoology 



XXVIII. — On the Fossil Botany and Zoology of the Rocks asso- 

 ciated with the Coal of Australia. By Frederick M'Coy, 

 M.G.S. & N.H.S.D. &c. 



[Continued from p. 236.] 

 [With nine Plates.] 



(Lamellibranchiata.) 



Pecten squamuliferus (Mor.). 



Common in the fine, olive-coloured schists of Wollongong, N. 

 S. Wales. 



Pecten ptychotis (M'Coy). PI. XIV. fig. 2. 



Sp, Char. Ovato-orbicular, width very slightly exceeding the 

 length, convex, smooth ; ears unequal, posterior one obtuse- 

 angled, undefined, anterior ear narrow, square at its extremity, 

 divided by a deep, acutely angular sinus, from the body of the 

 shell ; surface smooth, except the extremity of the anterior ear, 

 which is longitudinally plicated. 



It is only by the plication of the extremity of the anterior ear 

 that this can be known from the P. variabilis (M'Coy) so abun- 

 dant in some of the carboniferous shales of Ireland. Length 

 4 lines, width one-fourth of a line more. 



Common in the shale of Dunvegan, N. S. Wales. 



• Pecten sub-5-lineatus (M'Coy). PI. XVII. fig. 1. 

 Sp. Char. Truncato-orbicular, convex, equilateral, beaks tumid ; 

 ears large, nearly equal, flattened, the posterior one slightly 

 pointed and separated at the margin from the body of the shell 

 by a deep rounded sinus ; anterior ear broad, nearly square, 

 with a slightly convex margin ; surface of both ears and body 

 of the shell marked with a few obtuse concentric waves of 

 growth, and radiated with rather coarse narrow rounded ridges, 

 those of the ears being close and equal, while those of the 

 body are rather distant from each other, the interspaces being 

 flat ; about twenty-five proceeding directly from the beak to 

 the margin, where they are about two lines apart; between 

 those at a short distance from the beak are interpolated an 

 equal number of rather thinner ones, which again receive 

 nearer the margin two fine striae between each of them and the 

 adjoining primary ridge. 



The striation of this fine species resembles that of the P. quin- 

 quelineatus (M'Coy, Syn. Carb. L. Foss.) ; that is to say, near the 

 margin and towards the middle of the shell there are five striae 

 between each pair of primary ones, the middle or odd one of the 



