Vol. II, Pt. I] DALL— GALAPAGOS PULMONATA 33l 



sculpture of the upper whorls much like that in B. cyiiiafias 

 but the spiral sculpture more or less broken into dots; last 

 half of the last whorl with the surface irregularly coarsely 

 corrugated, but with no change of color; suture distinct, not 

 appressed; aperture with a thickened white, not reflected, 

 continuous margin; umbilical perforation small: outer lip 

 straight, not reinforced in the middle by any ridge or tu- 

 bercle; pillar with a large shapeless tubercle on the middle 

 which is not produced backward into the whorl ; body with 

 a small tubercle moderately produced inward in a feeble way; 

 axis of the upper whorls, simple tubular. Length of shell 

 17.5 ; of last whorl 13.0 ; of aperture 8.0 ; diameter 

 10.0 mm. 



Indefatigable Island, under lava blocks at 200 to 650 feet 

 altitude ; Ochsner. 



12. Bulimuius (Nsesiotus) jervisensis, new species 



Shell rude, showing remnants of a brovrn periostracum, 

 short-conic, with five and a half whorls ; nucleus crimson. 

 dimpled, transversely irregularly feebly wrinkled ; the last 

 one irregularly more or less corrugated ; spiral sculpture of 

 fine sharp close-set stride over the whole shell ; aperture 

 slightly thickened at the margin, not reflected, the pillar and 

 outer lips united by a layer of enamel on the body ; umbilical 

 perforation very small ; an obscure small tubercle on the 

 body, and in most specimens a slight ill-defined thickening 

 on the pillar; axis slightly twisted, very slender in the upper 

 whorls. Length of shell 17 ; of last whorl 13.5 ; of 

 aperture 9 ; diameter 11 mm. 



A few dead specimens were collected on Jervis Island at 

 an elevation of 900 to 1000 feet, by Mr. Ochsner. 



13. Bulimuius (Nassiotus) rabidensis, new species 

 Shell rather elongate, its profile more cylindrical than in 



sculptiiratus, thin, of about seven slightly convex whorls, 

 separated by a distinct, not appressed, suture; apex dimpled, 

 nucleus transversely minutely ribbed; the next tvro or three 

 whorls sharply closely spirally threaded, the threads slightly 

 pustular when they cross axial irregularities; the subsequent 

 whorls irregularly subaxially rugose with low broken ridges, 

 increasing in number and strength toward the aperture; the 



