406 CARBONIFEROUS LAMELLIBRANCHIATA. 



The name ^S'. suhplicatvs was proposed by Kirkby for a shell which I have referred 

 to Edmondia snhpJicata (siipr(i,-p. 315), from the Calciferous Sandstone series of 

 the Fifeshire coast, in 1880, and ' Quart. Journ. Geol. Soc.,' vol. xxxvi, p. 586, and 

 was therefore pre-occupied and not available for de Koninck's use. 



I have been kindly favoured by M. Dupont, of the Miisee Royal d'Histoire 

 Natnrelle de Belgique, with a plaster cast of de Koninck's 8. tumidus. It is 

 almost impossible to think that the figure was drawn from the specimen, because 

 the figure appears to be that of a perfect shell ; but the specimen is much damaged, 

 incomplete in front and behind, and is half as deep again in the dorso-ventral 

 diameter as the figure shows ; and in addition the anterior adductor muscle- 

 scar alluded to in the text, and so well seen in the figure, is quite absent. From 

 an examination of the description it cannot but be recognised that the garbled 

 figure, not the shells, forms the basis of the description. The shell in question 

 seems to me to be rather a large and smooth form of S. argutus. 



There can be no doubt, under all these circumstances, of the propriety of 

 dropping altogether the species 8. tumidus, the type specimen being lost, and the 

 secondary types being in such an imperfect and unsatisfactory condition. The 

 specimens in the Irish Survey Collection, probably those alluded to byde Koninck 

 {vide supra), labelled Myacites tumidus, are too poor for identification, and differ 

 altogether in shape from the shell shown in Phillips's drawing. M'Coy, in re- 

 describing the species, says, "A distinct keel runs from the beak to the posterior 

 angle ; " and adds " three obscure radiating ridges on the posterior side," characters 

 common to many species of the genus. 



Sanguinulites EoxBUHGBNisis, sp. nov. Plate XLVI, figs. 12, 13. 



Sangtjinolites? n. ?., BaiJi/, 18G2. Mem. Geol. Surv. Irel.ind, Expl. Sheet 127, 



p. 9, fig. 2 e. 



8pecific Characters. — Shell small, inequilateral, transversely elliptical, with an 

 obscure, rounded, oblique fold. The anterior end is short, gently convex ; the 

 narrowest part of the valve in the dorso-ventral direction; its border is rounded. 

 The inferior margin is very gently convex, rising posteriorly to curve towards the 

 posterior border, which it meets at a rounded angle. The posterior margin is 

 short, truncate, almost straight, oblique, and meets the hinge-line at a well-marked 

 obtuse angle. The hinge-line is long, arched in front, straight, and somewhat 

 depressed posteriorly. The umbones are small, tumid, incurved, and pointed, 

 only very slightly raised, and placed in the anterior quarter of the valve. Passing 

 obliquely downwards and backwards from ^vhe umbo to the postero-inferior anole 



