224 SUBULINA. 



S. octona var. trochlea MARTENS, Biologia, p. 299, pi. 17, f. 

 13. Sulnluia guayaquilcnsis MILLER, Malak. Bl. n. F. i, p. 

 126, pi. 13, f. 5 (1879) ; cf. STREBEL, Beitrag Mex. v, p. 116.- 

 ? Subulina monoceros BECK, Index Moll. p. 77, with var. 

 colonibiensis and boliviano,, not described, but said to = 

 H. octona var. a d'Orb. Achatina novenaria ANTON, Ver- 

 zeichniss, p. 44, no. 1601. Achatina panamensis MUHLFELDT 

 in coll. according to Pf eiff er. 



Brugiiiere's description of this species is not convincing 

 but in the absence of incontrovertible data showing that he 

 had some other species, it would be pedantic to change the 

 name. He refers to Chemnitz's figures which doubtless rep- 

 resent what we now know as octona. No measurements are 

 given. It is a common species in Guadeloupe and ' Saint 

 Domingue," the type localities cited by Bruguiere. In many 

 but not all Antillean specimens, the subsutural crenulation of 

 the embryonic shell is less conspicuous than in most continen- 

 tal shells. After carefully going over a collection of some 

 thousands of shells from a great many places, I can find no 

 adequate ground for the erection of subspecies or local varie- 

 ties, though there is considerable variation, as shown in the 

 figures. Pfeiffer's A. trochlea (pi. 39, fig. 40) is merely a 

 large specimen, 23 x 5 mm., with 10 whorls. Var. strebeli 

 Martens (pi. 39, fig. 36) described as "somewhat longer, 25-26 

 mm., with more whorls, 11-12, and a comparatively small 

 aperture," from the court of a house at Campeche, is evi- 

 dently only a well-grown individual. Snbulina (juayaquilensis 

 Miller was based upon a large form of S. octona, measuring 

 length 22, diam. 4, aperture 3.5 x 2.5 mm., with 11 whorls. 

 It was found in quantity in gardens at Guayaquil, Ecuador. 

 It has absolutely no claim to specific distinction. 



Specimens are figured from Santo Domingo City pi. 39, figs. 

 28, 29; Puerto Cabello, Venezuela, figs. 30, 31, 32; Morant 

 Bay, Jamaica, fig. 33; San Juan Bautista, Tabasco, fig. 34; 

 Izamal, Yucatan, fig. 35; Sans Souci, near Cape Haitian, fig. 

 37, and a drawing of the living animal by Gabb, Costa Rica, 

 fig. 39. 



