Original Descriptions of Achatinella. 81 



118. Achatinella rubiginosa Newcomb. 



A. rubiginosa Newc. P. Zool. Soc. London, 1853, p. 154, pi. xxiv, fig. 69. 



Shell dextral, solid, ovately conical ; whorls 6, rounded, mar- 

 gined above ; suture well impressed ; lip lightly subreflecled, 

 thickened within ; aperture ovate ; columella short, strongly den- 

 tate, with an expanded callus covering the umbilicus ; colour a 

 bright reddish brown, with a white band accompanying the sutures; 

 columella and lower and outer portion of last whorl white. Long. 

 15/20, lat. 8/20 poll. 



This species passes into the white variety of A. tcrniolata of 

 Pfeiffer ; but in the latter species the mantle of the animal is of a 

 dark slate-colour, and in the present species it is of a light flesh- 

 colour. The marking is characteristic of the species, the rusty hue 

 varying in intensity and quantity of surface covered in different 

 specimens. — Newc. 



I defer to the opinion of Dr. Pfeiffer in placing A. rubiginosa 

 as a synonym of his A. tcoiiolata. The form of the shells is nearly 

 identical, and although differing in marking, the principal ground 

 of separation originally was a difference in the animals. The 

 dark chestnut shell is furnished with a light, and even the immacu- 

 late variety of tcsniolata with a brown-colored mantle. — Newc. 



Hab. Palolo. — Newc. 



Dr. Cooke found this shell to be simply the brown variety of 

 A. tcsniolata Pfr. 



ABBREVIATA GROUP. 

 119. Achatinella abbreviata Reeve. 



.). abbreviata Rve. Rve. Conch. Icon. Achat., London, 1S50. sp. 19. 



Shell ovate, somewhat ventricose, dextral, whorls convex, 

 margined round the upper part, spire rather short, obtuse at the 

 apex, columella callous, twisted ; olive-yellow, with a black-brown 

 line at the sutures, lower part of the last whorl very dark green, 

 apex black. 



Animal light grey, covered with numerous granulations of a 

 dark slate ; mantle, a dirty yellow ; tentacles but slightly clubbed; 

 when extended, nearly as long as the shell. 



A. nivosa is this shell fully developed, with the epidermis 

 removed so skilfully as to escape detection at the time it was 

 described. — Newc. 



Hab. Palolo. 



Occasional Papers B. P. B. M., Vol. II, No. 3.— 6. , 



