294 ACHATINELLA TURGIDA. 



34. A. TURGIDA Newcomb. PL 29, figs. 10, Wa; pi. 56, figs. 1 

 to 4. 



"Shell ventricose, pointed at the apex, sinistral or dextral, 

 smooth, polished, gradually enlarging for four turns and then 

 very rapidly, the last two forming most of the shell ; suture 

 slightly impressed, beneath which revolves a linear depression. 

 Aperture subovate; columella short, terminating in a strong 

 conical tubercle projecting into the aperture ; outer lip simple, 

 thickened within, slightly tinged with pink or brown ; tubercle 

 the same; fauces white; coloring extremely various, ground 

 white, yellow or black, with or without longitudinal zigzag 

 lines, transverse bands or blotches covering the surface. 

 Length fourteen-twentieth, diam. eleven-twentieth inch." 

 (Newcomb.) 



Oahu: Ewa (Newcomb). Moanalua to Waiawa (or Wai- 

 pio, Thwing), the typical form westward, various varieties 

 eastward, within these limits. 



Achatinella turgida NENCOMB, P. Z. S., 1853, p. 134, pi. 22, 

 f. 10, 10a. PFR., Monogr., iv, 541. THWING, Orig. Descript. 

 Achatinella, p. 18, pi. 1, f. 4 ("the metropolis of this shell is 

 Waipio "). Achatinella cestus Newc., in part, SYKES, Fauna 

 Hawaiiensis, p. 300, pi. 11, f. 6, 7 ; not A. cestus Newc. 



The attempt is here made to define western, median and 

 eastern races of A. turgida, as a step towards a systematic 

 record of its local color-differentiation ; but I am aware that 

 the material at hand is inadequate. All of the races may run 

 into melanistic phenotypes, by themselves indistinguishable. 



The races are these : 



A. turgida, Waiawa, pi. 56, figs. 1-2. 



A. t. perplexa, Waimano, pi. 56, figs. 5-5/. 



A. t. simulacrum, Waimano-Manana ridge, pi. 56, figs. 13- 

 Ud. 



A. t. cookei, Waimano-Manana ridge, pi. 57, figs. 15-17. 



A. t. ovum, Moanalua to Waimano, pi. 56, figs. 6-10. 



Typical A. TURGIDA, Waiawa. Doctor Newcomb 's figures 

 copied photographically in my pi. 29, figs. 10, 10a, and speci- 

 mens received from him, agree closely with shells taken in the 



