ENTOMOCONCHUS. ' 49 



valve) ; the dorsal border is to the left of the reader, and the front end 

 upwards, 

 rig. e is a diagrammatic plan of the rays of the Muscle-spot. Compare our figs. 

 3 d and 4 d. 



In Prof. M'Coy's figures (1844)— 



Fig. 4 a, carapace showing right valve ; anterior upwards. 

 Fig. 4 h, ventral aspect. 



In Prof. Phillips's figures (1836)—- 



Fig. 23, carapace, side-view, showing left valve ; anterior end upwards. 

 Fig. 24, carapace, ventral view ; anterior upwards. 



In Prof. De Koninck's figures (1841, 1844)— 



Fig. 1 fl, side-view of carapace, showing the left valve ; anterior end upwards. 

 Fig. 1 h, ventral aspect of carapace ; anterior upwards. 



1. Entomoconchus Scoiileri, MCoy, Plate I, figs. 1 — 6. Var. ovalis, fig. 1. 



" Cypridiform Shell," J. Phillips, 1836. Illust. Geol. Yorkshire, part. 2, p. 240 and 



p. 251, pi. xxii, figs. 23, 24. 

 Entomoconchus Scouleri, M'Coy, 1839. Journ. Geol. Soc. Dublin, vol. ii, p. 91, 



pi. V, figs, a — e. 

 Cythekina Phillipsiana, De Koninck, 1841. Mem. Acad. Roy. Belgique, vol. xiv, 



p. 16, fig. 13; 1843, in D'Omalius's 

 Precis elem. Geol., p. 515. 



— — Morris, 1843. Catal. Brit. Foss., p. 73. 



— — De Koninck, 1844. Descript. Anim. foss. Terr. Carb. Belg., 



p. 585, pi. Hi, fig. 1 a, b. 



Entomoconchus Scouleri, M'Coy, 1844. Synops. Char. Carb. Foss. Ireland, p. 164, 



pi. xxiii, fig. 4. 



Cytherina Phillipsiana, Gumming, 1846. Quart. Journ. Geol. Soc, vol. ii, p. 322. 



Cythere — — 1848. The Isle of Man, Appendix Q, p. 355. 



Entomoconchus Scouleri, Morris, 1854. Catal. Brit. Foss., 2nd edit., p. 108. 



Cythere Phillipsiana, Duponf, 1863. Bull. Acad. Roy. Belg., ser. 2, vol. xv, p. 110. 



Entomoconchus Scouleri, Jones ^ Kirkby^ 1863. Geologist, vol. vi, p. 460 ; 1864, 



Rep.Brit. Assoc, for 1 863,Trans. 

 Sect., p. 80 ; Neues Jahrb., 

 1864, p. 54 ; Canad. Nat. Geol., 

 1864, new ser., vol. i, p. 236 ; 

 1866, Ann. Nat. Hist., ser. 3, 

 vol. xviii, pp. 41, 46, 48. 



1 The references in 'Trans. Geol. Soc. Glasgow,' 1867, vol. ii, p. 218, and 'Trans. Geol. Soc. Glasgow,' 

 vol. iii, Supplement (Young and Armstrong's ' Carb. Foss. W. Scotland,' 1871), p. 28, were by our mistake 

 made to specimens of Cypridina Phillipsiana. 



6 



