42 MOLLUSCA. 
of which is oblique to the axis. Whorls six, narrow and closely con- 
voluted, crossed with fine, crowded, recurved lamine, which curve 
gracefully like an S in their course, and bear fine, scattered hairs. 
Above, they form a low, dome-shaped spire. Suture profound. Be- 
neath convex, with a large, deep umbilicus, in which all the whorls 
are beautifully displayed. Aperture nearly circular, modified by the 
penult whorl, a little angular at base, so that the columellar portion 
rises nearly vertically, and is a little reflexed. 
Diameter three-tenths of an inch; axis one-sixth of an inch. 
Found by Dr. Pickering, in a crater near Taiaimi, New Zealand. 
A very beautiful and remarkable shell, in its markings, unlike any 
other I know, excepting H. dissimils, D’Orbigny (Amer. Merid. 247, 
pl. 26, f. 18-21), which much resembles it, but it is larger, more 
marked in dots, and is not described as hairy. In general form, 
striation, umbilicus, &c., it is like H. sériata, Drap., but somewhat 
more depressed. 
Figure 44, the shell above ; 44 a, view of the side ; 44 , view of the 
base; 44 c, magnified view of the sculpture. 
HELIX saxaTILis (Couthouy ) Gould. 
Testa parva, sub-globosa, lucida, viridis, infra convexa, umbilico modico 
perforata, leviter striata: spira anfractibus vix quatuor cylindracets, 
cito crescentibus ; sutura canaliculata : apertura sub-orbicularis, ampla ; 
labro simplici, ferée continuo. 
Hehz saxatilis, (Couthouy) MS., Goutp; Proceed. Boston Soc. 
Nat. Hist., 11. 171. Aug. 1346. Expedition Shells, 19. PFEIrrer; 
Monog. Helic. Viv., i. 84. 
Anima “bright black, covered with fine granulations ; foot beneath 
dark slate-colour. Body elongated, rounded, separated from the foot 
by a fine beaded ridge in a slight furrow. Head abrupt; upper ten- 
tacles long and slender, inferior ones about one-third their length. 
