187 Jaw and Lingual Dentition of Pulmonata. 
Lingual membrane long and narrow (pl. xvi, fig. B.). Teeth as 
usual in the Helicinw. The change from laterals to marginals is very 
gradual, the latter being but a modification of the former, with two cut- 
ting points, the inner the longer. Thus it appears that this species in its 
dentition agrees with B. cinnamomeo-lineatus, pallidior, chrysalis, deal- 
batus, Guadalupensis, alternatus, sporadicus, solutus, sepulcralis, durus, 
Peruvianus, rhodolarynz, and not with laticinctus, Bahamensis, auris-leporis, 
papyraceus, Jonasi, membranaceus, trigonostomus, flavidus, virginalis, con- 
vexus, Vincentinus, Lobbi, alternans, multifasciatus, primularis (see Ann. 
Lyc. N. H. of N. Y., XI, 34 et seqq.). 
Teeth 30-1-30 with about ten laterals. The outer cutting point of the 
marginals is sometimes bifid. 
Cylindrella Poeyana, Orb. 
Key West. Mr. W. W. Calkins. 
Jaw as usual in the genus, with about 40 delicate ribs. 
Lingual membrane long and narrow (pl. xv, fig. F). Teeth 14-1-I4 
of the same type as I have already shown to exist in this subgenus Gon- 
gylostoma (see C. elegans, Pfr. Proc. Phil. Ac. Nat. Sc., 1875, pl. xx, fig. 6). 
Cylindrella ornata, Gundl. (Gongylostoma). 
Cuba.- Cabinet of Mr. Bland. 
Jaw not observed. 
Lingual membrane with 18-1-18 teeth, of which three only are well 
formed laterals, the change to marginals being very gradual. The type 
of dentition is the same as I have des¢éribed in C. Poeyana (see above). 
It will be noticed in my figure F of plate xv, that there is a slender, 
Simple, upper prolongation or pedicle above the inner, palmate cutting 
edge, as well as the pedicle on which the outer cutting edge rests. This 
is the case also in C. elegans and C. Poeyana, and may, therefore, be con- 
sidered characteristic of the section Gongylostoma. 
Amphibulima Rawsonis, Bland in litt. 
Governor Rawson to Mr. F. Bland. Island of Montserrat, 
between Nevis and Guadeloupe. 
Plate xiii, fig. C, represents the genital system. There are no acces- 
sory organs. 
The jaw is as usual in the genus (see Proc. Phila. Ac. Nat. Sc., 1874, 
pl. viii, fig. 2, for that of A. rubescens). About 33 ribs, those at the 
upper centre of the jaw running obliquely and meeting or ending before 
reaching the lower margin. 
NOVEMBER, 1875. 14 ANN. Lyc. Nat. Hist., VOL. XI. 
