752 
Transactions of the Society . 
Gaudryina d’Orbigny [1840]. 
Gaudryina filiformis Berthelin, plate XI. fig. 7. 
Gaudryina filiformis Berthelin, 1880, Mem. Sec. geol. France, 
ser. 3, yoI. i. No. 5, p. 25, plate i. fig. 8. 
This form was first described by M. Berthelin from the Ganlt 
of Montcley in the North of France. It has also been found in 
recent soundings at dapths varying from 390-620 fathoms (Brady) ; 
and from shallow-water dredgings yielding small specimens from 
Ireland and Scotland (Wright, Balkwill and Robertson). This form 
is well distributed throughout the Folkestone Gault ; occurring in 
zone i., specimen a , very rare ; zone i., specimen b, very rare ; zone ii., 
specimen b, rare ; zone ii., specimen e, very rare ; zone iii., rare ; 
zone iv., rare ; zone v., very rare ; zone vii., very rare ; zone ix., very 
rare ; zone xi., 55 ft. from the top, very rare ; 35 ft., rare ; 25 ft., 
very rare. 
Gaudryina pupoides d’Orbigny, plate XI. fig. 8 a, b. 
Gaudryina pupoides d’Orbigny, 1810, Mem. Soc. geol. France, 
vol. iv. p. 44, plate iv. figs. 22-21. G. pupoides Brady, 1884, Chall. 
Bep. vol. ix. p. 378, plate xlvi. figs. 1-4. 
A common and well distributed form throughout the Gault and 
Chalk. It has been recorded from the Neocomian beds of North 
Germany (Reuss) ; the Folkestone Gault (T. Rupert Jones in 
Morris’s Catalogue, 2nd edition) ; the Red Chalk of Speeton (Burrows, 
Sherborn, and Bailey) ; the Upper Greensand and Chalk-Marl of 
Cambridge (G. R. Vine); and the Chalk of France and England 
(d’Orbigny). The specimens found by M. Berthelin in the Gault 
of France given under the names of G. spissa and G . gradata are 
probably local differentiations of this type ; in the Folkestone Gault 
are found specimens varying in length and in the inflation of the 
triserial commencement, but as no distinct separation can be made 
between the forms it seems advisable to record them as G. pupoides. 
It is found in zone i., specimen b, common ; zone ii., specimen a, 
frequent ; zone iii., very rare ; zone v., very rare ; zone vi., very 
rare ; zone viii., very rare ; zone ix., frequent ; zone x., very 
common ; zone xi., 50 ft. from the top, very common ; 45 ft., very 
common; 40 ft., rare ; 35 ft., very common; 30 ft., very common ; 
25 ft., very common; 12 ft., frequent. 
Gaudryina rugosa d’Orbigny, plate XI. fig. 9 a, b. 
Gaudryina rugosa d’Orbigny, 1840, Mem. Soc. geol. France, 
vol. iv. p. 44, plate iv. figs. 20, 21. G. rugosa Hantken, 1875, 
Mittheil. Jahrb. d. k. ung. geol. Anstalt, vol. iv. p. 13, plate i. fig. 4. 
This species is distinguished from G. pupoides by the rough 
texture of the shell, and the sharply triangular shape of the triserial 
