718 MESSRS. E. HEEON-ALLEN AND A. EAELAND ON THE 



JRolalia beccarii Williamson, 1858, RFGB. p. 48, pi. iv. figs. 90-92. 

 Brady, 1884, FC. p. 704, pi. cvii. figs. 2, 3. 

 Egger, 1893, FG. p. 420, pi. xix. figs. 25-27. 

 Millett, 1898, etc., FM. 1904, p. 502 (References). 



17 Stalions. 



Universally distributed and generally fairly abundant. The specimens vary con- 

 siderably in size, the general average being rather small, but well-grown and typical 

 individuals occur at Stns. 3, 7, 8, and 10. Nearly all the specimens are of a 

 smooth and hyaline type with little excess of shell-growth ; none of the highly limbate 

 and tuberculate varieties occurs. 



416. Kotalia perlucida Ileron-Allen & Earland. 



Rotalia beccarii (pars) Balkwill & Wright, 1885, DIS. p. 351. 



„ perlucida Herou-AUen & Earland, 1913, CI. p. 139, pi. xiii. figs. 7-9. 



10 Stations. 



Good and typical examples at Stns. 1, 4, 7, and 12, and weaker individuals at many 

 others. At Stns. 7 and 8 abnormal individuals, in which the earlier rotaline chambers 

 were followed by irregular growths of no definite formation, w^ere found. The R. nitida 

 of Reuss (Kreidegebilde des Westlichen Bohmens., Prague, 1844, p. 214) is perhaps a 

 similar or identical form, judging from the published diagnosis, but the first published 

 figures (R. 1845-6, VBK. pt. i. p. 35, pi. viii. fig. 52 & pi. xii. figs. 8, 20) are too 

 small and obscure to be identifiable with certaiuty. In any case, Reuss's name does 

 not stand, as it had been used by d'Orbigny for a form indistinguishable from 

 FidvinuUna menardii, the types of which we have examined in Paris (d'O. 182G, TMC. 

 p. 274. no. 31). 



417. Eotalia orbicularis (d'Orbigny). 



Gyroidina orbictilaris d'Orbigny, 1826, TMC. p. 278. no. 1, Modele no. 13. 

 Rotalia orbicularis Brady, 1864, RFS. p. 470, pi. xlviii. fig. 16. 



,, beccarii, var. orbicularis Parker & Jones, 1865, MAAF. p. 389, pi. xvi. fig. 34. 



„ orbicularis Terquem, 1882, FEP. p. 60, pi. iv. (xii.) figs. 1-3. 



Brady, 1884, FC. p. 706, pi. cvii. fig. 5, pi. cxv. fig. 6. 



„ „ Egger, 1893, FG. p. 421, pi. xix. figs. 22-24. 



15 Stations. 



Universally distributed in company with i?. heecarii, all the specimens being of a 

 somewhat weakly developed type. Brady, in 1864, in describing d'Orbigny's species 

 as new to the British fauna, identified his specimens with d'Orbigny's Model, and 

 figured a test which closely follows the Model in its biconvex form and acumuiate 

 superior face. These features, however, are more marked in Brady's figure than in 

 the Model or in any specimens which we have observed. Subsequent authors, includ- 

 ing Brady himself (B. 1884, FC), have departed considerably from the Model, and the 



