784 PROCEEDINGS OF THE ACADEMY OF [NoV., 



pathologic, would seem to be of some significance. We have not seen 

 specimens. 



Endodonta marsupialis n. sp. PI. XLIII, figs, l, 2. 



Shell lenticular; nearly smooth; light horn colored profusely macu- 

 lated with reddish brown; spire elevated, convexly conoid; whorls 6^ 

 nearly flat, overhanging a little at the suture; periphery acutely keeled ; 

 base convex, with a shallow depression near the peripheral keel; the 

 umbilicus is about one-fifth the diameter of the shell, angular at the 

 edge; the whorls within the umbilicus concave, the side walls sloping 

 inward, and hence the cavity is wider within than at the opening, where 

 the whorl projects in a sort of cord. 



Aperture oblique, trapezoidal, provided with two spirally entering 

 parietal lamellae, the outer one largest and bifid, one columellar lamella, 

 four l)asal plicae and one palatal plica. 



Alt. 4, diam. 8 mm. 



Oahu. Types in the collection of the Academy of Natural Sciences 

 No. 58,190, presented by Mr. J. S. Phillips. 



Some specimens have an extra smaller basal and palatal plica near 

 the peripheral angle and some are albinos, corneous yellow, without 

 dark markings. 



This species may be distinguished from E. lameUosa (Fer.) by its 

 smaller umbilicus and higher spire; from E. kamehameha by its greater 

 size, larger teeth and elevatefl spire. It is distinguished from E. con- 

 centrata by the greater size and more numerous teeth. It differs from 

 all the other forms by its cavern-like umbilicus, in which the eggs are 

 deposited. 



This snail represents a line of differentiation parallel to the section 

 Libera Garrett, in the structure of the umbilicus. 



Endodonta kamehameha n. sp. PI. XLIII, figs. 3, 4. 



Shell lenticular; nearly smooth; yellowish olive, often with the last 

 whorl partly brown, with some traces of darker brown maculation on 

 the spire. Spire moderately depressed, composed of 5^ flat whorls; 

 suture linear; periphery acutely keeled; base conical, slightly impressed 

 near the periphery. Umbilicus about one-third the diameter of the 

 shell, wide and rounded at the bottom, thimble-like with sub vertical 

 walls at first, then becoming perspective, terraced, a narrow ledge run- 

 ning down about 1^ whorls, the side walls remaining vertical, only 

 sloping outward a little at the last half w'horl. Aperture oblique, 

 trapezoidal, furnished with two spirally entering parietal lamellae, one 



