Original Descriptions of Achatinella . 31 



Animal when extended in motion, longer than the shell. 

 Mantle and tentacles brown, the latter with the head above, of 

 darker shade. Foot light yellow, the superior portion of darker hue. 



The nearest allied species is A. suiftii Newc; but the shape 

 and color of the shell, separate habitat, and difference of animal, 

 entitle it to rank as a distinct species. 



The native Hawaiians firmly believe in the power of the 

 Achatinella to produce musical sounds. Hence the Hawaiian 

 name, "pupu kanioe," singing shells. Their legends ascribe to 

 them a vesper song. — Bald. 



Hab. Kawailoa. — Bald. 



PERVERSA GROUP. 

 35. Achatinella perversa Swainson. 



A. pet-iei'sa Swain. Zool. 111., iii, p. 99, fig. 2, 1832. 



A. testa sinistrorsa, sub trochiformi, fusca faciis transversis nigricantibus 

 lineisque longitudinalibus ; apice suturaque albis. 



Shell reversed, subtrochiform, fulvous brown, with darker 

 transverse bands, and longitudinal lines ; apex and suture white. 



Shell less trochif orm , but somewhat larger than the last \_A . pica 

 Swain.]. The terminal whorls of the spire are likewise formed in 

 the same manner; these, together with the suture, the pillar, and 

 the aperture, are pure white. The rest of the shell is a drab-col- 

 oured brown, variegated hy transverse blackish bands and lines ; 

 and sometimes by others, in a waved direction, near the suture. 

 The spiral line, which follows the suture, and the tip of the shell, 

 both of a pure white, renders this a very elegant species. — Swain. 



Animal long as the shell ; light grey color, tentacles and 

 sheath light brown with a bar of brown across the front, upper 

 tentacles alone clavate, strongly swelling at their base ; granula- 

 tions large. There are several varieties of this species, one of 

 which has so near an approach to A. decora, as to lead to their 

 being confounded with each other. They are, however, widely 

 separated in locality, and the animals are even more distinct in 

 markings and habits than the shells themselves. — Newc. 



Hab. Helemano to Kawailoa. 



The following three species, although not closely related to 

 A. perversa, are placed in this group on account of their geo- 

 graphical position. This grouping of the shells is intended largely 

 as an aid in cabinet arrang-ement. 



L^ 



