172 Dull — Diagnoses of Isfexo ,\ of MoUusks* 



Actreon (Rictaxis) paines sp. nov. 



Shell with one smooth, polished nuclear and three or more subsequi r 

 strongly sculptured whorls; apex sinistral, immersed; spire very short" 

 and blunt: body stout, ovate, slightly peripherally flattened; sculpture- 

 of strong, subequal, spiral riblets, covering the whole shell, separated by 

 slightly narrower, coarsely punctate channels; outer lip sharp; pillar 

 obliquely subtruncate in front, twisted, vertical, with a prominent plait- 

 like edge, and a moderately prominent plait about midway of the ex- 

 posed portion; body with a very thin wash of callus; color of the shell 

 yellowish subtranslucent white. Length of shell, S.O; of aperture, 7.25; 

 max. breadth of shell. 5.0 mm. 



This is immediately distinguishable from A. punctocoefata Cpr., b> 

 its short spire, stouter form, and absence of the blackish color bands 

 The specimen described seems not quite maturs. It is No. 10?, 301, U. 

 S. National Museum. 



Clathurella fowei sp. nov 



Shell translucent white, with a brownish-pink flash on the spire and! 

 base; nucleus smooth, polished, rounded, and rather inflated, of one 1 

 whorl; subsequent whorls, five (or more), sculptured with (on the penul- 

 timate whorl 13) short axial riblets, slightly oblique with narrower inter- 

 spaces, the riblets confined to the peripheral part of the whorl and sepa- 

 rated from the suture behind by the spirally striated anal fascioler spira? 

 sculpture covering the whorl, of slender flatfish threads with wider in- 

 terspaces, one thread at the shoulder more prominent than the rest, form- 

 ing a wavy keel over the riblets; suture inconspicuous, closely appressed: 

 aperture narrow, canal short, anal sulcus shallow, close to the suture; 

 outer lip prominent, thickened, the edge sharp and incurved; canal short, 

 slightly recurved, pillar lip smooth. Length of shell, 7.7; of last whorl. 

 5.0; max. diameter of shell, 3.3 mm. Another specimen is 9 mm. long. 



This species resembles Glyphostoma but has, in the specimens seen, no- 

 sculptured callus on the pillar lip. It is not closely like any of the 

 species hitherto known from the coast. It is possible that still older 

 specimens mi<*ht show some granulation on the inner lip. The type is- 

 No. 109,302, U. S. National Museum. 



Mangifia fanclierae sp. nov. 



3hell slender, elongate, of a dark reddish-brown when fresh; nucleus 

 somewhat swollen, smooth, of about two whorls; subsequent whorls about 

 -ix or seven, similarly sculptured: axial sculpture of numerous low 

 slender flexuous riblets with wider interspaces, extending from the suture 

 to the periphery and obsolete on the base of the shell; these are crossed 



