380 CALIFORNIA ACADEMY OF SCIENCES [Proc. 4th Ser. 



irregularly retractivel}^ axially finely wrinkled ; last two 

 coarsely irregularly strongly wrinkled all over; umbilicus 

 minutely perforate, base rounded; aperture small, contracted, 

 thickened, with continuous not reflected margin; pillar and 

 body with prominent tubercles, that on the pillar continued 

 backward into the penultimate whorl as an obscure plait, that 

 on the body also continued for a shorter distance in the last 

 whorl, the axis in the earlier whorls slender, perforate. 

 Length of shell 8.0 ; of last whorl 5.5 ; of aperture 

 3.5 ; diameter 5.5 mm. 



Indefatigable Island, in the moist area on the south side 

 at 350 to 400 feet, and at all altitudes in the interior; Ochs- 

 ner. 



10. Bulimulus (Naesiotus) cymatias, new species 



Shell small, solid, uniform yellowish brown, with nearly 

 seven whorls, rapidly enlarging; surface uniformly sculp- 

 tured with slightly irregular retractive narrow, close-set 

 wrinkles crossed by extremely fine spiral threads of which 

 at regular intervals one is more prominent than the rest; 

 near the aperture are some irregular rugosities or indenta- 

 tions in some specimens but no change of color; there is a 

 narrow inconspicuous pale peripheral band ending behind 

 the median tubercle of the outer lip ; base rounded, umbilicus 

 narrowly perforate ; aperture with a continuous thickened 

 margin, a well defined tubercle inside the outer lip, a strong 

 tooth anteriorly on the pillar, and one on the body; both 

 these are continued into the shell, the one on the pillar as a 

 strongly undulated ridge which extends, diminishing into the 

 penultim.ate v^diorl. while the parietal tooth also extends in- 

 ward about half a whorl, but less distinctly undulated and 

 rapidly diminishing; the tubercle on the outer lip is hardly 

 extended. Length of shell 14 ; of last whorl 8 ; of 

 aperture 5 ; diameter 8 mm. 



Indefatigable Island, under lava blocks in a moist area be- 

 tween 400 and 650 feet elevation; Ochsner. 



11. Bulimulus (Naesiotus) ochsneri, new species 

 Shell chocolate brown, with no indications of a peripheral 



band, solid, stout, with six and a half whorls ; apex dimpled, 

 closely transversely sculptured, tinged with deep carmine; 



