958 New Land Shells from Costa leica. 
the latter character it also differs from Vetrinoconus. It has 
the shell, and probably, the appendiculate mantle, ot Helzca- 
rion; but that genus has a horn-shaped process over its 
eld pore. . 
Its linyual membrane resembles that of Limax agrestis | in 
having elie | inner, abnormal side cutting point to its first lateral 
teeth. All the marginals are bifid. 
For geographical Giemibution see below, under V. Gasol 
Velifera Gabbi, n. sp. 
Animal (pl. xi, fig. A) blunt before, tapering behind: greenish, with a con- 
tinuous black band above the margin of the foot, and a second band broader 
and a little higher up, broken by oblique light lines; median line of back 
nearly white: mantle apparently with two processes, one on the right, the 
other on the left, half enveloping the shell. -It has the peculiarity, when 
distressed, as with the warmth of the hand, of throwing itself, hke a worm, 
with vigorous blows of its tail. Caudal pore without overhanging process 
(plate xi, fig. D). a 
Shell (pl. xi, fig. B) imperforate, globose, very thin, pellucid, dark green- 
ish brown; suture impressed; spire short, elevated; whorls 3; aperture 
rounded, slightly oblique: peristome simple, flexuose above, scarcely re- 
flected below. Greater diam. 6, lesser 5, height 3 mill. 
Locality, Flanks of Pico Blanco, 8000 feet. 
For jaw and lingual dentition, see generic description. 
Teeth, 30-12-1-12-30. 
Flite xi, fig. E, represents a species very nearly allied to, if 
not ential ean V. Gabbi, from 3000-6000 feet elevation of 
Pies Blanco. It resembles in outline D’ Orbigny’ s figure of) 
Felix progastor (Voy. ? Amér, Merid., pl. xvii, fig. 12-15). I 
received a lingual membrane as belonging to this shell, and) 
figure it on plate xi, fig. F; though I cannot help suspecting) 
that it belongs to some species of Bulimulus. I did not my-| 
self extract it from the shell. 
Cryptostrakon,* n, g. 
Animal (pl. xi, fig. H, central figure) slug-like, cylindrical, attenuated be- | 
hind; mantle slightly anterior, thin, small, oval, entirely covering the shell; ‘ 
sibs locomotive disk? ; no caudal mucus pore; rospitatony orifice on the | 
— fi con re oan el! | 
Se T ; " 
x Kpurros, 0 OOTPAKOY, CONG iled shell, | i 
) 
