[ob | 
CYCLOTUS.—CYCLOPHORUS. 
Var. berendti. , 
Cyclotus berendti, Pfr., in Malak. Blitt. viii. p. 171 (1861)'; Monogr. Pne m. Vivent. iii. p. 30°; 
Novit. Conch. ii. p. 232, t. 59. figg. 22, 23°. 
Cyclotus dysoni, var.?, Strebel, Abhandl. Geb. Naturw. Ver. Hamb. vi. 1, pp. 9, 10, t. 1. 
fig. 3%. . 
Hab. Yucatan, Campeche (Strebel*). Also recorded from Vera Cruz, from dead shells 
found on the shore, and from Mirador (Berendt1?°)—this locality appears 
doubtful. 
The solution of the aperture and the duplicity of the peristome, which are urged by 
Pfeiffer as specific characters, are perhaps only an individual aberration. Through the 
kindness of Dr. H. Dohrn I have had an opportunity of examining Pfeiffer’s original 
specimen : it offers a somewhat campanulated expansion of the last whorl just behind 
the aperture, and the so-called double peristome appears to be an accidental super- 
structure somewhat similar to that observed in some examples of Helix desertorum 
(H. chilembia, Bourg.). The general form appears rather more depressed than in 
C. dysoni; the sculpture is quite similar. Berendt’s other specimens from the same 
locality agree with it in the general shape, but want the superstructure of the peri- 
stome, therefore I have quoted them among C. dysont. 
Fischer and Crosse’s Neocyclotus berendti (t. 38. fig. 4) does not agree with Pfeiffer’s 
specimen, and may be also a variety of C. dysoni; these authors also give “ Boom, Belize 
river, British Honduras (Berendt)” as a locality. 
4, Cyclotus (?) boucardi. 
Cyclotus boucardi, Angas, P. Z. S. 1878, p. 73, t. 5. figg. 3, 4°, and 1879, p. 483 ne 
Hab. E. Costa Rica: San Carlos (Boucard!); mouth of Banana river, five miles from 
Limon (Gabd”). 
The operculum seems to be unknown, and as Angas! compares the structure of the 
peristome with that of Cyclophorus (not Cyclotus) mexicanus, the genus of this species 
remains to be confirmed by the discovery of the operculum, 
CYCLOPHORUS. 
Cyclophorus, Montfort, Conch. Syst. ii. p. 290 (1810). 
Operculum thin, corneous. 
Subgen. Ampuicyctotus, Fischer & Crosse. 
Amphicyclotus, Fischer & Crosse, in Journ. de Conch. xxvii. p. 46 (1879). 
Edge of the aperture thin, straight. 
1. Cyclophorus (Amphicyclotus) ponderosus, 
Cyclostoma stramineum, Morelet, in litt. (nec Sow.)’. 
