VERONICELLA. 351 
Hab. S.W. Mexico: Cacoprieto, on the Isthmus of Tehuantepec (Sumichrast *). 
S.E. Mexico: Palenque, State of Tabasco (Morelet } 4), 
Yucatan: Carmen I. (Morelet 4). 
Fischer and Crosse lay stress on the circumstance that the hinder extremity of the 
body is not confounded with the foot (plan locomoteur), but is produced in the form 
of a caudal appendage, which is extended considerably beyond the foot when the 
animal isin motion. In Morelet’s figure, however, the hinder point of the foot appears 
to extend beyond the rounded hinder end of the mantle. 
3. Veronicella stolli, sp. n. (Tab. XIX. figg. 13, 14.) 
Chestnut-brown, with yellow and black not very close-set dots and a median narrow yellow longitudinal band, 
finely and equally shagreened, 25 millim. long, 6 broad. Mantle narrower in front than behind ; upper 
feelers 3 millim. long, blackish-grey ; lower feelers scarcely 1 millim. long, conical, with blunt appendage ; 
lower surface of the mantle whitish, in the two posterior thirds of its length finely grey-marbled and 
with few black dots. 
Hab. W. Guatremata: Retalhuleu, in cacao-gardens, under putrid wood and decayed 
bark of rotten shrubs (Séol/). 
Although I cannot give anatomical particulars, I venture to name this form from 
the description and figure made by Dr. O. Stoll during his residence in Guatemala. 
He remarks that, when the animal is reposing, the feelers are concealed within a 
quadrangular transverse excavation at the lower side of the mantle (which may be the 
case in all the species of the genus), and that the palpitation of the heart can be seen 
in the living animal on the right side at one-third of the length of the body. 
4. Veronicella floridana. 
Vaginulus floridanus, Binney, Terr. air-breath. Moll. N. Am. i. p. 17, t. 67 (1851) *; Leidy, 
op. cit. 1. p. 251, t. 4 (anatomy) *. 
Veronicella floridana, Binney, Land and Freshw. Shells N. Am. i. p. 305, figg. 541, 542°; Terr. 
air-breath. Moll. N. Am. v. pp. 241, 248*; Man. Am. Land-Shells, p. 446°; Tate, Am. 
Journ. Conch. v. p. 15°. 
Very slightly wrinkled, dark ashy-grey, mottled with black, with a median whitish line, on each side of which 
is an ill-defined black stripe; beneath drab-coloured. Length 56, breadth 18 millim. 
Hab. Nortu America: Florida. 
E. Nicaragua: Javali in Chontales, under stones; probably also at Toro Rapids 
(Tate+°°), 
5. Veronicella olivacea. 
Veronicella olivacea, Stearns, Proc. Bost. Soc. Nat. Hist. 1871 (or Conchological Memorandum, 
no. viii.), p. 1‘; Fisch. Journ. de Conch. xxiii, p. 54 (1879) *; Binney, Terr. air-breath. 
Moll. N. Am. v. p. 243°; Bull. Mus. Comp. Zool. xi. no. 8, p. 1504; Man. Am. Land- 
Shells, p. 160°. 
