106 PABTULINA, SECTION BALDWINIA. 



physa Newc., var. ph&ostoma ANCEY, Proc. Malac. Soc. Lon- 

 don, vi, p. 121, June, 1904. Achatinella physa Newc., var. 

 procera ANCEY, Journ. of Malacol., xi, p. 69 (Palihoukapapa, 

 in fossil bed). 



Doctor Newcomb's second description is reproduced. I 

 believe with Mr. Sykes that Newcomb's first description 

 and figure (pi. 17, fig. 6) of A. physa (1854) pertain to the 

 form subsequently called A. liawaiiensis, which he took to be 

 the young stage of the larger shell which he afterwards 

 (1855) obtained and later figured as A. physa. One lot in 

 the Robert Swift collection (A. N. S. P.) at least 50 years 

 old, received from Newcomb, contains two ' hawaiiensis } 

 with others of the large form like Newcomb's figure of 1866. 

 Dr. C. Montague Cooke and Mr. Thaanum, who have gone 

 over the evidence and figures with me, agree in this interpre- 

 tation of Newcomb's A. physa, confirming the opinion of Mr. 

 Sykes. 



The first whorl of the embryo is smooth ; subsequent whorls 

 are finely striate spirally. The first two whorls are creamy- 

 brownish, after which there are zigzag brown flames (fig. 12). 

 These may continue as far as the middle of the fifth whorl, 

 but they usually disappear earlier. In other embryonic shells 

 there is a brown band just below the periphery, followed by 

 a white band (fig. 11). These persist in the adult shell to the 

 end. In a number of examples with uterine young sent by 

 Mr. Thaanum, the young shells of one parent are not diverse, 

 but in every case agree with the mother in pattern. These 

 observations have been confirmed by the examination of large 

 series in Mr. Thaanum 's collection. The periphery is acutely 

 carinate and the columella is sinuous in embryo shells at all 

 stages examined. 



On the last whorl of the adult shell the crowded spiral lines 

 of the early stages become weak, often almost obsolete, and 

 wide apart. The color varies as shown in the figures and 

 described below. The columella is brown or white, nearly 

 straight or somewhat sinuous. Umbilicus half open or more. 



Length 26, diam. 17, aperture 14 mm.; 6^ whorls. 



Length 26.2, diam. 15.5, aperture 12.8 mm. ; 6 T / 2 whorls. 



