234 RINGICULID.E, SCAPHANDRIDJE. 



The form of the lip and plicate columella suggest Cyprceactceon 

 White (Contr. Paleont. Brazil, p. 176, in Archives do Mus. Nac. do- 

 Kio de Janeiro, vii), but that Cretaceous fossil is a large form, with 

 inflexed, crenulated outer lip and apical umbilicus. The Brazilian 

 species, being an internal cast, no information is available on the 

 sculpture of the shell. It is doubtful whether Cyprceactceon is really 

 a Tectibranch. Ovulactceon Dall (Vol. xv, p. 178) has no columel- 

 lar folds. 



P. PARVUS Hedley. PL 74, fig. 7. 



Shell minute, white, solid, oblong, involute, spire buried, imper- 

 forate at either extremity, the posterior of the inner portion of the 

 last whorl obliquely sloped. Sculptured by about thirty spiral 

 grooves, whose interstices are three times their breadth, and are cut 

 by longitudinal stride into squarish facets. Aperture as long as the 

 shell, vertical, contracted in the middle, expanded anteriorly and 

 posteriorly, inner lip overlaid with callus ; outer lip smooth, greatly 

 thickened externally and internally, springing from a false umbili- 

 cus in the vertex, arched higher than it, arcuate peripherally, curv- 

 ing below the whorl up to the columella and chanelled at the junc- 

 tion ; anteriorly the columella bears a strong entering fold, posterior 

 and parallel to which is a weaker one, and posterior to this again a 

 small deeply-seated third fold is just distinguishable. Length H, 

 breadth 1 mill. Animal unknown. (Hedley*). 



Manly, near Sydney, alive, at low tide on rocks, and dead in shell 

 sand from Middle Harbor, Port Jackson, Australia. (A. U. Henu). 



P. parvus HEDLEY, /. c., p. 106, pi. 23, f. 1. 



Family SCAPHANDEID^ (Vol. xv, p. 242). 

 Genus SCAPHANDER (Vol. xv, p. 244). 



S. ALATUS Dall. PL 74, Fig. 4. 



Shell pure white, with a pale straw-colored epidermis, polished, 

 punctate, with a pervious axis ; sculpture of faint lines of growth 

 crossed by numerous fine rows of punctures, with wider, pretty regu- 

 lar, interspaces ; behind the pillar-lip a few of these rows are so im- 

 pressed as to form grooves ; form of the shell ovate, attenuated in 

 the posterior third ; aperture as long as the shell, narrow behind, 

 rounded in front ; outer lip sharp, produced behind the immersed 

 spire in an alate manner ; body with a thin wash of smooth pure 



