PARTULINA, MAUI. 73 



39. P. PORCELLANA FULVICANS Baldwin. PL 19, figs. 15, 16. 



" Shell dextral or sinistral, very minutely perforated, 

 rather thin, acuminately ovate conic, apex subacute; surface 

 shining, marked with delicate incremental striae, under a lens 

 exhibiting extremely close, minute decussating spiral striae; 

 nuclear whorls faintly cross-lined. Color very light yellow, 

 or sometimes white with one or two light yellowish transverse 

 lines; a conspicuous dark band near the apex. Whorls 6, 

 somewhat convex, narrowly margined above; suture well im>- 

 pressed. Aperture oblique, oval, white within. Peristome 

 acute, slightly thickened within, columellar margin narrowly 

 reflexed. Columella terminating in a strong white nexuous 

 fold. Length 18^, diam. 10^ mm.' (Baldwin). 



East Maui: Kipahula Valley, Hana (G. 0. Cooper; D. 

 Thaanum). 



Partulina fulvicans BALDWIN, Nautilus, xix, p. 135, April, 

 1906. 



Topotypes from Mr. Baldwin are figured. Fig. 16 is green- 

 ish-yellow with the embryo nearly white, without a dark band. 

 Fig. 15 is white above the periphery, light olive below, the 

 embryo bicolored, being white, broadly banded with flesh 

 color above the suture, the band extending to the apex. Other 

 shells are greenish-yellow, fading upwards to white at the 

 suture and with a faint light peripheral band, the embryo 

 having a rather dark olive or brown band. The shell is 

 glossy, with the Partulina spiral sculpture but faintly devel- 

 oped. It differs from Partulina crocea by the gloss, faint 

 sculpture, and differently colored embryonic shell. It is very 

 closely related to A. porcellana and ivailuaensis from which 

 it differs only in coloration, the dark bands being absent, and 

 the aperture white throughout. I do not know whether it 

 occurs in a pure colony, but presume this is the case. Mr. 

 Baldwin remarks: " The sinistral variety may prove to be a 

 distinct species. The molluscan life of this rather secluded 

 valley has only recently been explored. ' 



40. P. NATTII (Baldwin et Hartman). PL 20, figs. 8, 9, 10, 11. 

 " Shell dextral, turbinate, spire half the length; whorls 5, 



