680 PROCEEDINGS OF THE ACADEMY OF [1900. 



within. Subcolumellar lamella not emerging. Principal plica 

 strong, visible within the aperture, where it even approaches the 

 lip, extending inward but slightly beyond the palatal plicae. 

 Palatal plicae two, parallel, rather long, diverging from the prin- 

 cipal plica anteriorly, and nearly ventral in position. No lunella. 



Alt. 15.5, diam. 3.5, longest a,xis of aperture 4 mm. 



Fukura, Awaji Island (Mr. Y. Hirase). 



This species has much the form and color of the otherwise very 

 different C. aurantiaca. It differs from C. caryostoma Mlldff. in 

 having no punctiform plica between the two palatals, and in 

 having the superior lamella very widely separated from the spiral 

 lamella ; from C. inter lamellar is v. Mart, in the wholly immersed 

 Subcolumellar lamella, disconnected superior and spiral lamellae, 

 and in having two, not four, palatal plicae. C. gracilispira Mlldff. , 

 described from Kobe, differs in being smaller, with three palatal 

 plicae, and continuous superior and spiral lamellae. C. validiuscula 

 var. bilamellata Bttg., of Kiusiu, has three palatal plicae and is a 

 larger shell. t. 



The wide hiatus between the superior lamella and the spiral 

 lamella is characteristic of this species, which is named in honor 

 of the editor of the Proceedings of the Academy of Natural 

 Sciences of Philadelphia. 

 Clausilia tosana n. sp. PI. XXV, figs. 22, 23, 24, 25, 41. 



Shell small, slender, fusiform, solid, distinctly attenuated and 

 with concave outlines above; light brown; finely, rather irregu- 

 larly striate. Whorls 9 to 10J, the upper ones convex, last three 

 less so, the last whorl compressed, tapering, becoming free for a 

 short distance in front (like a " Cylindrella "). Aperture slightly 

 oblique, pyriform, the sinulus a little retracted; peristome con- 

 tinuous, expanded, somewhat refiexed, thickened and white. 

 Superior lamella small and rather low, oblique, attaining the mar- 

 gin, continuous with the spiral lamella, though there is a depres- 

 sion at their junction. Inferior lamella not emerging, hardly visi- 

 ble in a front view, but seen to be strong when viewed obliquely ; 

 inside it ascends almost vertically, and is stouter below. Sub- 

 columellar lamella very deeply immersed. Inside the spiral and 

 Subcolumellar lamellae terminate on the ventral side and are of 

 about equal length, while the inferior lamella is slightly shorter. 

 Principal plica strong, visible within the aperture, ascending to a 



