1917.] 



NATURAL SCIENCES OF PHILADELPHIA. 



215 



P. alveola (Souverbie), more especially the last, which differs in 

 details of sculpture and somewhat in coloration. 



The substitution of Pupa for Solid ula is one of the unfortunate 

 consequences of adopting Bolten's nomenclature. 



-^^ 



Fig. 1. — Pupa thaanumi. Fig. 3. — Acteocina lionoluluensis. 



Fig. 2. — Acteocina sandwicensis. 



Acteocina sandwicensis (Pease). Fig. 2. 



1860. Tornatina sandwicensis Pse., F. Z. S., p. 19; description reprinted 

 in Man. Conch. XV, 190. 



Pease's set of this species, No. 31712, M. C. Z., consists of five 

 somewhat beach worn specimens, all of them having lost the nuclear 

 whorls. There are, I think, two species in the lot, both of which 

 have been dredged together by Mr. Kuhns, off Honolulu in 6 to 8 

 fathoms. As these specimens are perfect, the figure is drawn from 

 one of them. No. 117071, A. N. S. P. 



The form which may be taken as typical A. sandwicensis is cylin- 

 dric, white, glossy, with minute sculpture of close, superficial spiral 

 stria?, not extending upon the shoulder or spire. The spire is con- 

 vexly conic. The nuclear whorl is more than half immersed. There 

 are 3| subsequent whorls. The columellar is rather straight, with 

 a very small fold above, and in an oblique view in the aperture 

 a low prominence may be seen near the base. The inner lip has a 

 rather heavy callus. Outer lip is strongly arched forward, as usual. 



Length 4.05, diam. 1.7 mm. 



