270 PKOCEEDINGS OF THE MALACOLOGICAL SOCIETY. 



The type-specimen of this variable species is described as follows: — 

 " Shell dextral, ovate conic, whorls 5^, slightly rounded, body whorl 

 somewhat inflated, two-thirds the length, the first one and a half 

 composed of slightly curved plica3, suture lightly impressed, epidermis 

 dark brown with black zig-zagged lines and linear striae, body whorl 

 a dark red colour beneath the epidermis, aperture semi-ovate, dark red, 

 columella straight, with a white twisted plait near the base. L. 15, 

 W. 7, L. apt. 6. Diam. apt. 3 mill. Molokai." 



This species, as before remarked, is a protean one, according to 

 Mr. Baldwin, who states {in litt.) that Mr. Sykes' A. citrea is but 

 a form of Hartman's shell. The same gentleman also sent me the 

 following varieties, stating that the animals do not vary, the shells 

 only differing in colour and shape. They were both collected in 

 Molokai. 



Yar. MAURA, n.var. PI. XIII, Fig. 16. 



Shell much larger and more obese than the type (length 1 7, width 9, 

 apert. 7 mm.), with 6 whorls. Colour dark red, blackish at the apex, 

 periostracum black, decorticated at some places ; columellar margin 

 very dark with a whitish fold ; interior of aperture dark purple red. 



Yar. SEMICAENEA, n.var. PI. XIII, Fig. 8. 



Shell larger than the type, but more slender than var. maura 

 (length 16-5, width 8-5, apert. 6 mm.), with 6 whorls. Apex 

 blackish, the subsequent whorls fulvous, sometimes with straight, 

 somewhat obscured, revolving lines, the lower half of the last whorl 

 yellowish flesh-coloured. Columellar margin bluish, with a white 

 plait. Mouth light-coloured. 



It should be remarked that Hartman's original figure is somewhat 

 inaccurate, and does not give an adequate idea of the shell. 



7. Baldwinia, n.subgen. (of Achatinella). 



Testa subgeneri Partidinm afiinis, sed plerumque tenuior, peristomate 

 parum incrassato et expansiusculo et pra;cipue plica columellari contorta 

 deficiente discrepans. 



Hob. — Hawaii and, perhaps, Oahu and Maui. 



T\ji:)es : AchatineUa physa, J^ewcomb, A. Horneri, Baldwin, 

 A. Hawaiiemis, Baldwin, all from Hawaii. A. grisea, Xewc, and 

 A. dubia, Xewc, may be referable also to this group ; which has been 

 confounded by some with Partidina, and by others with Newcomhia, 

 while it appears to stand apart from both. It diff'ers from Perdicella 

 in having a larger shell with expanded and somewhat thickened lip ; 

 and I name it after Mr. D. D. Baldwin, who has added so much to our 

 knowledge of the Hawaiian fauna. 



8. Leptachatina isthmica, n.sp. PI. XIII, Fig. 20. 



Testa subfossilis (an omnino extincta?), pro genere crassiuscula, 

 subopaca, nitens, alba, ultimo anfractu post suturam plerumque 



