Original Descriptions of AcJiatinella. 8i 



ii8. Achatinella rubiginosa Xewcomb. 



A. fubigiiioi^i Newc. P. Zool. Soc. London. 1853. p. 154, pi. xxiv. fig. 6g. 



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. tceniolata 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 intensit}- 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. tccniolata. 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 tccniolata with a brown-colored mantle. — Newc. 



Hab. Palolo. — Newc. 



Dr. Cooke found this shell to be simi)ly the brown variety of 

 A. tceniolata Pfr. 



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ABBREVIATA GROUP. 

 119. Achatinella abbreviata Reeve. 



.). abbreviata Rve. Kve. Conch. Icon. Achat.. London. 1S50. sp. ig. 



Shell ovate, somewhat ventricose, dextral, whorls convex,' 

 margined round the upper ]iart, spire rather short, obtuse at the 

 apex, columella callous, twisted ; olive-j-ellow, 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, nearl\- as long as the shell. 



A. nivosa is this shell full}- developed, with the epidermis 

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

 described. — Newc. 



Hab. Palolo. 



OCC.^SION.^L P.A.PERS B. I'. B. JI.. VOL. II. NO. ;.— 6. 



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