292 AMERICAN JOURNAL 



7. Helix laminata, Pease. 



Description. — T. lenticularis, depressa, late et profunde urn- 

 bilicata, oblique rugosula costata et sublente striis spiralibus 

 obsolete decussata ; apice obtuso; anfr. 6-7, convexiusculis, 

 peripheria acute carinata ; basi convexiusculis, costellis vol- 

 ventibus et striis radiatis decussata; apertura trapezoidalis, 

 lamina? 2 in pariete, 1 in columellas, 4 in basali, 1 in supero. 

 Cornea, fusco maculoso strigata. 



Dimensions. — Diam. 7, alt. 2ff mill. 



Shell lenticular, depressed, the upper surface obliquely 

 ribbed, ribs small, irregular, rather close and sometimes 

 curved or wrinkled, and obsoletely decussated by very fine 

 revolving stria?; umbilicus deep, one-third of the diameter 

 of the shell, and angulate at its edge ; whorls 6-7, upper pnes 

 faintly marginate; spire slightly convex, and apex obtuse; 

 aperture trapezoidal, furnished with eight prominent laminae, of 

 which two are on the wall of the aperture, one on the colu- 

 mella side, one on the upper, and four on the outer side. Yel- 

 lowish-brown color, spotted and striped with reddish-brown. 



Habitat. — Sandwich Islands. 

 8. Helix capillata, Pease. 



Description. — T. laevis, tenuissima, planorboidea, late et pro- 

 funde umbilicata, radiatum costata, interstiis subtilissime, et 

 subfiexuose striatus, striis volventibus, remotis, ornata ; epi- 

 dermide membranaceus induta ; clathris setigeris insignis ; 

 anfr. 5, obtuso-carinatis, spira concava, sutura valde impressa; 

 ad peripheriam rotundata; apertura subcircularis, rubro-casta- 

 nea et straminea tessellata. 



Dimensions. — Diam. 5, alt. 2 mill. 



Shell very light, thin, planorboid, concave above, radiately 

 jibbed, ribs numerous, rather small, their interstices very finely 

 and somewhat flexuosely striated, also ornamented with re- 

 mote revolving stria?, which are most conspicuous on the pe- 

 riphery and base ; shell covered with a membranaceous epi- 

 dermis, bearing radiating lines of stiff hairs ; whorls 5, obtusely 

 carinated, suture deeply impressed, periphery broadly rounded, 

 base obtusely carinate ; umbilicus open and deep, comprising 

 nearly one-half the diameter of the shell ; aperture subcircular. 

 Alternately and radiately banded with reddish-brown and light 

 straw-color. 



Habitat. — Sandwich Islands. 



