CORILLA. 67 



The palatal plates are disposed in much the same manner as in 

 C.fryce, but they are shorter and less curved (see fig. 23 d), 

 which shows a portion of the inner side of the outer wall with the 

 palatal plates in situ. The parietal folds are almost identical in 

 shape and position with those in fryce (see fig. 23 e) but they are 

 shorter and the union of the first and second (upper and median) 

 folds is not so complete. The specimen shown in fig. 23 e is of 

 interest on account of a small adventitious denticle between the 

 second and third folds. * 



Var. erronella, Gude. 



Gorilla erronea, var. erronella, Gude, Science Gossip. N. s. iii, 

 1896, p. 127, fig. 16. 



Much smaller and thinner than C. erronea, and the palatal 

 lamellae much shorter and placed much nearer the mouth of the 

 shell. The outer terminations of the parietal folds and the whole 

 of the thin upper palatal lamellae are visible from the aperture 

 (see fig. 24 a). The third palatal lamella, which in C. erronea is 



Fig. 24. Gorilla erronea, var. erronella. 



nearly horizontal, is here strongly oblique and ascending, while the 

 fourth readies nearly to the peristome (see fig. 24 c). Known 

 from a unique specimen in the late Col. Beddome's collection. 

 He received it with the MS. name C. erronella, Nevill. 



75. Gorilla carabinata, Ferussac. 



HeMcodonta carabinaia, Ferussac, Tabl. Syst. Liina^ons, 1821, p. 38, 



n. 109. 

 Helix carabinata, Ferussac, Hist. Nat. Moll.,, Expl. Planches, 1822, 



p. iii, pi. 51 B, fig. 3 (shell and armature) ; Bowdich, Elem. Conch. 



1822, pi. 7, fig. 19; Deshayes, Anim. sans Vert. ed. 2, viii, 



1838; 'Delessert, llec. Coq. 1841, pi. 26, fig. 8 ; Guerin, Icon. 



Kegne Anim., Moll. 1844, pi. 6, fig. 5; Chenu, 111. Conch. 1850, 



pi. 12, fig. 8. 



Helix rivolii, Deshayes, Encycl. Meth., Vers, ii, 1830, p. 208 ; ibid, 

 in Ferussac, Hist. Nat. Moll, i, 1839, p. 7 ; Pfeiffer, Conch.-Cab., 



pi. 2, fig. 10 ; Hanley & Theobald, Conch. Ind. 1870, pi. 14, fig. 2. 

 Helix (Atopa) rovolti, err. typ., Albers, Die Heliceen, 1850, p. 90. 

 Anchistoma (Atopa) rivolii, Chenu, Man. Conchyl. i, 1860, p. 463, 



figs. 3452-54. 

 Hcliv (Gorilla) rivolii, Nevill, Hand List, i, 1878, p. 70. 



