4 Neiv Species of Amastra. 



apex. First embryonic whorl smooth and polished, slightly con- 

 vex; the second flat with rather strong nearl}- straight uneven 

 striae. The post embryonic whorls are regularly and closely sculp- 

 tured with coarse growth-wrinkles; the last two in addition hav- 

 ing very faint close irregular, spiral striae. The last whorl cylin- 

 drical, ascending rather rapidly just back of the peristome. Aper- 

 ture rather long and narrow, its regularly curved outer margin 

 furnished with a well defined lip-rib. Columella slender, nearly 

 perpendicular, its outer margin impressed into the surface of the 

 shell and furnished near its base with a low, blunt, oblique fold. 

 The latter terminating graduall}- close to the outer margin of the 

 columella. 



Length 24.0, diam. 12.2, apert. 10.9 mm.; 6^ whls. (Holotype) 

 " 24.7, " 13.0, " 10.6 " 6^ " 



" 23.9, " 12.2, " 10. o " by'i " 



Kauai : In the Kauaiula branch of Milolii valley (C. A. Rice). 



Type and cotype No. 41,993, paratypes No. 16,062, Bishop 

 Museum. 



Oul}^ five recently dead specimens were taken by Mr. Rice of 

 which uo two are exactly similar in the characters of the last 

 whorl. In the type specimen and one other, the last whorl is 

 rounded at the periphery. In a third specimen, there are three 

 narrow parallel furrows on the periphery. In this specimen there 

 is an oblique angle where these lines meet the margin of the aper- 

 ture, which is flattened above. In the two remaining specimens 

 there is a low oblique keel on the periphery- and the last half of 

 the last whorl is slightl}^ shouldered just above the suture. The 

 ■upper half of the peritome is slightly flattened. 



At first glance this species appears to be closeh' related to 

 A. a«///(?;// especially as both species have almost the same color- 

 pattern and the surface sculpture is somewhat similar. In A. 

 ricei, however, the form and sculpture of the embryonic whorls is 

 almost like that of A. knudsejii and A. kaiiaiensis, \.\\.o\x^\X\^ 

 strict are not as coarse as in either of these two species. It is 

 interesting to note that A. ricei is probably a connecting link 

 between the sections Arniiclla and Aviastiella . 



\_11'2.'\ 



