404 CARBONIFEROUS LAMELLIBRANCHIATA. 



figured specimen is preserved in the Sowerby Collection of tlie British Museum 

 (Natural History branch), Cromwell Eoad ; but the fossil is so poor and imperfect 

 as to be almost unidentifiable. I reproduce the shell, PI. LI, fig, 1, by the kind 

 permission of Dr. Henry Woodward. It may possibly belong to the same species 

 as de Koninck's shell, but perhaps it is far wiser to drop Sowerby's "species" 

 altogether under the circumstances, although it seems to me that the specimen 

 possesses evidence of its belonging to the genus Sajiguinolites. It may, however, 

 be stated that I found the shell referred to Sowerby's 8. gibhosa in the Irish Survey 

 Collection, PI. XL VI, fig. 4. However, had not de Koninck described his S. 

 hwurians it might have been possible to retain the earlier species in spite of its 

 problematical nature. The cast, PI. XLVI, fig. 5, is unfortunately very imper- 

 fect, and belongs to a larger shell than either de Koninck's type or the Irish 

 Survey specimen. In this the interior shows little or no evidence of the approach 

 to angularity of the oblique ridge, as seen on the exterior, but I do not think I am 

 mistaken in referring this specimen to S. luxtiVLans, 



Sanguinolites TOMiDUS, Phillqjs, sp., 1836. 



Sanguinolaria ? TUMiDA, Phillips, 1836. Geol.Torks., pt. 2, p. 209, pi. v, fig. 8. 



— — Morris, 1843. Cat. Brit. Foss., 1st edit., p. 100. 

 Sanguinolites tumidus, M'Coi/, 1843. Synops. Carb. Foss. Ireland, p. 50. 

 Sanguinolaria? tumida, Bronn, 1848. Nomeucl. Palseont., p. 1110. 



— — Brown, 1849. Illust. Foss. Conch., p. 219, pi. xc, 



fig. 13. 

 Ltonsia tumida, cV Orhigny, 1850. Prodrome paleontoL, vol. i, p. 128. 

 Mtacites tcmidus, Morris, 1854. Cat. Brit. Foss., 2ud edit., p. 213. 

 Sanguinolites tumidus, Griffith, 1860. Jouru. Geol. Soc. Dublin, vol. ix, p. 59. 



— — Bi(/sb^, 1S77. Thesaurus Devonico-Carboniferus, p. 313. 



— — de Ko7iiuck, 1885. Ann. Mus.E.oy. Hist. Nat. Belgique, 



vol. xi, p. 81, pi. xvi, fig. 6. 



— coMPRESsus, de Koninck, 1885. Ibid., p. 82, pi. xvi, fig. 8. 

 Mtacites tumidus, Etheridrje, 1888. Brit. Foss., pt. 1, Palaeozoic, p. 286. 



Observations. — Unfortunately the type specimen of Sanguinolaria ? tumida, 

 Phillips, has completely disappeared, as was the case with all those which were in 

 that author's private collection. The figure is an altogether impossible one. The 

 original description is as follows: " Transversely elongated, diagonally gibbous ; 

 hinge straight ; shell imbricated. In the cast the posterior side is marked by strong 

 ridges from the beak (not well seen in this figure, which is reduced from a large 

 Irish specimen)." The species was redescribed by de Koninck as Sanguinolites 



