GASTEROPODA. 43 
Respiratory orifice large, on the right side behind the collar, which is 
thick and of a dark slate-colour. Near the extremity of the foot above, 
is a sort of truncation, in which is situated a mucus-pore.”’ 
SHELL small, fragile, thin, of a leaf-green colour, depressed above, 
rounded below, delicately striated. Suture deeply channelled. Whorls 
less than four, rounded and rapidly enlarging. Aperture nearly cir- 
cular, being but little modified by the penultimate whorl; lip simple ; 
urnbilicus rather small. [J. Pp. c.] 
Length of axis one-tenth of an inch; diameter one-fourth of an 
inch. 
Found by Mr. Couthouy, on the mountains near Orange Harbour, 
Tierra del Fuego, in company with H. /yrata. 
Resembles in general H. ducida, and is remarkable for its globular 
form and fresh green colour. For its locality and habits see the re- 
marks under H. lyrata, page 40. 
Figure 33, animal with the shell, enlarged ; 33 a, profile of the shell ; 
and 33 8, base of the shell, enlarged ; 33, natural size. 
HELIx cicercuLa (Gould). 
Testa depresso-globosa, tenuis, sub-opaca, imperforata, albido-virescens, 
strits incrementi conspicuis et striis volventibus sparsts insculpta, 
infra rotundata ; foved central modica: spira anfractibus quinque 
convexis, ultimo angulato : apertura lunata ; labro simpli ; columella 
superné viz reflexa. 
Helix cicercula, Gouin; Proceed. Boston Soc. Nat. Hist., ii. 171. 
Aug. 1850. Expedition Shells, 20. Pretrer; Monog. Helic. Viv., 39. 
SHELL sub-orbicular, depressed, thin, slightly diaphanous, of a pale 
grayish-green colour, marked with rather distinct, irregular lines of 
growth above and beneath, and with a few faint, irregular, revolving 
lines. Whorls five, rather convex, separated by a well-marked 
suture, and forming an obtuse, depressed spire. Periphery with an 
