6 CRETACEOUS ENTOMOSTRACA. 



Cttheeina subdeltoidea, Geinitz. G-rund. Verst.-Kunde, 1845, p. 244, pi. viii, 



fig. 21. 

 CxTHEBE TEiGONA, Bosqiiet. Mem. Soc. Eoy. Sci. Liege, vol. iv, 1847, p. 358, 



pi. i, fig. 3. 

 Baiedia subdeltoidea, Jones. Monogr. Entom. Cret., 1849, p. 23, pi. v, fig. 15. 

 CxTHEEiHA — Beuss. Haidingcr's naturw. Abhandl., vol. iii, Abth. 1, 



1850, p. 40, pi. viii, fig. 1. 

 — — — Ibid., vol. iv, Abth. 1, 1851, p. 47. 



Baiedia — Bosquet. Mem. cour., &c., Acad. Eoy. Belgique, vol. 



xxiv, 1852, p. 29, pi. i, fig. 13. 

 Ctpeis peistina, Eichwald. Lethsea Eossica, pt. 3, 1853, pp. 316 and 317, pi. xi, 



fig. 23. 

 Baiedia subdeltoidea, Bosquet. Mem. Commiss. Carte G-eol. Neerlande, vol. ii, 



1854, p. 66, pi. viii, fig. 4. 



— — Beuss. Denkscbr. k. Akad. Wiss. "Wien, vol. vii, 1854, 



pp. 41 and 139. 



— — Jones. Monogr. Entom. Tert., 1856, p. 52 (not the 



figures). 



— — Egger. Neues Jahrb. £. Min., &c., 1858, p. 405, pi. i, 



fig. 1. 



— — Speyer. Bericht Vereins Naturkunde Cassel (for 1860 — 



1862), 1863, p. 43, pi. i, fig. 5 (right valve), 

 and B. oviformis, ibid., fig. 6 (left valve). 



— — G. S. Brady. Trans. Zool. Soc, vol. v, 1866, p. 365, 



pi. Ivii, fig. 8. 



— — Jo7ies. Geol. Mag., 1870, pp. 75 and 157. 



— — Beuss. In Geinitz's Elbthalgebirge in Sachsen, pt. 2, 



1874, p. 140, pi. xxvi, fig. 5. 



— — var. DENTICULATA, Mavsson. Mittheil. naturw. Ver. Neu" 



Vorpommern und Eiigen, Jahrg. 12, 

 1880, p. 34, pi. ii, fig. 9. 



— — J. Kafka. Crustaceen bohm. Kreidef., 1887, p. 13, fig. 23. 



— — Jones and Sherlorn. Geol. Mag., 1887, p. 387. 



— — — Suppl. Monogr. Entom. Tert., 1889, 



p. 16, pi. i, fig. 15. 



Fig. 33. Left (large) valve : Lengtli "94 ; height '61 mm. 



Fig. 34. Right (small) valve of a smaller individual : Length '88 ; height "5 mm. 



Fig. 3L Smaller individual : Length '77; height? thickness "38 mm. 



B. subdeltoidea has been mentioned in several geological and palaeontological 

 memoirs and handbooks as occurring in the Cretaceous and Tertiary strata of 

 Europe. As to the exact specific relationship of the many recorded fossil speci- 

 mens with each other and with recent forms, there is room for doubt. In 1874 

 Dr. Reuss expressed an opinion that it was doubtful if any of the fossil forms were 

 of the same species as the recent (see ' Elbthalgeb., p. 140) ; and Dr. G. S. Brady 

 considers that, of the recent forms, B. foveolata (' Challenger Report Ostracoda,' 



