NUCULANA. 11 



3. Chalk Species. 

 Nuculana, sp., cf. siliqua (Goldfuss). Plate II, figs. 10 ft, b. 



1837. Nucula siliqua, A. Goldfuss. Petref. Germ., vol. ii, p. 156, pi. cxxv, fig. 13. 

 1816. — — A. F. Eeuss. Die Verstein. der bohrn. Kreideformat., 



pt. ii, p. 7, pi. xxxiv, fig. 11. 

 1850. Leda siliqua, A. d'Orbigng. Prodr. de Pal., vol. ii, p. 236. 

 1877. — — A. Fritsch. Stud, im Gebiete der bohm. Kreideformat. 

 ii. Die Weissenberger und Malnitzer Scbichten, 

 p. 117, fig. 18. 

 1885. Nuculana siliqua, F. N'dtling. Die Fauna der baltiscli. Cenoman.- 

 Gesebiebe (Pala3ont. Abhaudl., vol. ii, pt. iv), p. 27, 

 pi. iv, fig. 15. 

 1889. Nucula siliqua, O. Griepenkerl. Die Versteiu. der Senon. Kreide von 



Konigslutter (Palseont. Abhandi., vol. iv), p. 57. 

 1889. Leda siliqua, E. Hohapfel. Die Mollusken der Aacheuer Kreide (Palae- 



ontographica, vol. xxxv), p. 203. 



1892. — — F. Vogel. Verhandl. der uaturh. Ver der preuss. Ebeinl., 



&c, vol. xlix, p. 73. 



1893. — — A. Fritsch. Stud, im Gebiete der bobm. Kreideformat. v. 



Priesener Schichteu, p. 92. 

 1895. — — F. Vogel. Die holland. Kreide, p. 37. 



1897. Nuculana, cf. siliqua, R. Woods. Quart. Jouru. Geol. Soc, vol. liii, 



p. 378. 



Non 1842. Nucula siliqua, H. B. Geinitz. Char. d. Scliichteu u. Petref. d. sachs.- 



bohm. Kreidegeb., pt. iii, p. 77, pi. xx, figs. 28, 29. 



Remarks. — There are two specimens in the Montagu Smith Collection (Wood- 

 wardian Museum), which agree well with the figures of N. siliqua given by 

 Goldfuss and Reuss — especially the latter ; but since, like the figured specimens, 

 they are in the form of casts, it is difficult to be sure of their identity. This 

 form may perhaps belong to the sub-genus Perrisonota, Conrad. 1 



Measurements : 



Length . . . . . .16 mm. (approximate). 



Height 6 „ 



Type. — The type comes from the Aachen Greensand. 



Distribution. — Chalk Rock (Reuss ianum-zone) of Cuckhamsley. 



1 ' American Journal of Concbology,' vol. v (1SC9), p. 98, pi. ix, fig. 24. 



