PARTULINA. 365 



horneri 



f 



physa 



confusa 

 horneri 

 konana errans 



P. HORNERI (Baldwin). Page 107. 



On p. 108 the color- varieties of this species have been de- 

 scribed. On going over the series sent by Mr. Thaamim it 

 seems worth while to emphasize the perfectly constant differ- 

 ences by applying names to the forms. If they are always 

 found in pure colonies, as seems to be the case, these patterns 

 have a racial value. In any case, the names will be useful in 

 discussing the composition of colonies. 



The typical horneri has a broad peripheral band, a small 

 umbilical patch and an inconspicuous subsutural band (often 

 faint in the adult stage), of light ochraceous buff (pi. 17, fig. 

 1). These bands are all present in the embryonic stage, pi. 

 54, fig. 11. It will be noted that the peripheral band extends 

 above the peripheral angle. 



Var. Candida. PI. 17, figs. 3, 4; pi. 54, fig. 12, embryo. 

 (= var. c, p. 108.) The peripheral band of the embryo is nar- 

 rower, and does not extend above the angle. There are no 

 other bands on the cream-white shell. 



A small form of P. h. Candida has been found at Honoula, 

 N. Kona, and sent by Dr. Cooke. The peripheral band persists 

 longer than in Kukuihaela shells, being visible on the front of 

 the last whorl. The spiral striation is a little stronger. 

 Length 18-19 mm. 



Var. fuscospira. PI. 54, fig. 13, embryo (=var. d, p. 108). 

 Embryo cinnamon below, light buff above the periphery, a 

 white line below the suture. 



Var. fuscozonata. PI. 17, figs. 2, 5 (=var. &, p. 108). 



P. PHYSA KONANA P. & C., n. subsp. PI. 54, figs. 5, 5a. 



The shell is smaller than physa, thin ; periphery marked 

 with a brown band ; above this it is zigzag-streaked with brown, 

 and cream-white, the pattern usually confused on the last 



