54 THE NAUTILUS. 



Bulimulus (Nsesiotus) tortuganus n. s. 



Shell small, solid, moderately elongated with six and a half 

 Avhorls ; the earlier whorls subtranslucent madder brown with a pale 

 peripheral stripe, more or less silky and sculptured with very fine 

 spiral lines ; sutures very distinct ; later whorls malleated, wrinkled 

 or pecked ; rude, fleshy white, with a variably large perforate 

 umbilicus ; aperture small, with a lump on the pillar and another 

 within the middle of the outer lip ; lips thickened, white, slightly 

 reflected, the throat brownish, body with a thin, transparent callus. 

 Lou. of shell 12, of aperture 5*5 ; max. diam. of shell 7 mm. 



La Tortuga, grassy zone, South Albermale, Baur. 



This shell which is very characteristic seems to be abundant 

 where found by Dr. Baur. It seems nearest to B. simrothi Reibisch. 

 of the described species. It is remarkable for the illustrations it 

 gives of the varied influence of the environment on different individ- 

 uals. The sculpture of the last whorl recalls that of B. rugiferus. 

 The young is hispid and colored like that of unifaseiatus, but is 

 narrower ; the pale peripheral band is almost wholly obscured in 

 the adult and the hairs are soon lost. 



Bulimulus (Nsesiotus) Bauri n. s. 



Shell small, short, stout, with a dark rapidly attenuated spire, 

 distinct suture, and opaque yellow-brown last whorl ; whorls about 

 seven, the earlier ones dark livid purple with straw colored streaks, 

 paler at the suture, rude and malleated ; last whorl inflated, more 

 or less transversely wrinkled, somewhat polished ; umbilicus closed 

 or- a mere chink ; aperture subquadrate, angulated behind and at 

 the base of the pillar ; pillar short, oblique ; lips simple, thick, 

 especially across the body where the callus has a raised edge ; throat 

 white. Lon. of shell 10, of aperture 45 ; max. lat. of shell 6'5 

 mm. 



Hibernating on the under side of leaves of plants at the Southwest 

 end of Chatham Island, 1600 ft. above the sea. Dr. Baur. 



This'is one of the most distinctive species of the whole group. 



Hyalinia chathamensis n. s. 



Shell small, thin, straw colored, depressed, with four rounded 

 polished whorls ; suture distinct ; sculpture of numerous radiating, 

 slightly flexuous, indented lines; umbilicus deep, exhibiting all the 

 volutions, but rather narrow. Max. diam. 3, min. diam. 2'2o mm. 



Alt. of shell 1-30 mm. 



