564 
Transactions of the Society . 
The specimens are numerous and fine, and all, without exception, 
have the limbate sutures common in the recent, but rarely found in 
the fossil examples. It is restricted to Stations 2 and 22. 
Bigenerina d’Orbigny. 
Bigenerina nodosaria d’Orbigny, plate VII. fig. 13. 
B. nodosaria d’Orbigny, 1826, Ann. Sci. Nat., vol. vii. p. 261, 
pi. xi. figs. 9-12 ; Modele No. 57. B. nodosaria (d’Orb.) Fornasini, 
1887, Atti Soc. Nat. Modena (Eendie.) ser. 3, vol. iii. p. 108, pi. i. 
figs. 3, 4. B. nodosaria (d’Orb.) Haeusler, 1890, Abhandl. scliw eizer. 
Pal. Gesell., vol. xvii. p. 73, pi. xii. figs. 1-4. B. nodosaria (d’Orb.) 
Goes, 1894, K Svenska Vet.-Akad. Handl., vol. xxv. p. 27, pi. vii. 
figs. 313-323 ; and Clavulina textularioidea p. 42, pi. viii. figs. 387- 
399. B. agglutinans (d’Orb.) Egger, 1895, Jahresber. XVI. naturhist. 
Ver. Passau, p. (8) pi. i. fig. 1. Clavulina textularioidea (Goes) 
Goes, 1896, Bull. Mus. Comp. Zuol. Harvard Coll., vol. xxix. p. 37, 
pi. iv. figs. 26-38. B. nodosaria (d’Orb.) A. Silvestri, 1896, Mem. 
Pont. Accad. Nuovi Lincei, vol. xii. p. 81, pi. ii. figs. 5, 6. 
The specimen figured possesses the characters of the species in 
an extreme degree ; it is smoothly arenaceous, and in this form is very 
rare, having been noticed only at Station 10. Very common is the 
rough form equivalent to the B. agglutinans of ll’Orbigny, which 
occurs at several Stations in both areas. 
Clavulina textularioidea Goes seems to be nothing more than an 
aberrant form of this species. 
