'242 PEDICULARIA. 



are usually persistent on a portion of the back of the adult; 

 whitish, tinged with brown within. Length, 10 mill. 



Sicily, Isle of Hyeres, France ; on polyps. 

 Thyreus paradoxus, Phil., and probably Gadinia lateralis, 

 Requien, are synonyms. 



P. CALIFORNICA, Newcomb. PL 1, fig. 4. 



Depressly globose, crimson-colored, minutely transversely 

 striated, above rounded, below broadly rounded ; lip expanded, 

 semicircular; columella thick, dilated within, straight ; aperture 

 elongately subovate ; extremities broadly notched. 



Length, 10 mill. Southern California, on coral. 



P. JAPONICA, Dall. PI. 1, fig. 5. . 



Elongated, sinuated ; whitish, irregularly suffused with rose- 

 pink, apex yellowish pink, interior darker, livid pink; exter- 

 nally rather coarsely grooved and striated ; apex somewhat 

 mammillated, vertex umbilicated ; columella straight, incon- 

 spicuous ; lateral margins much produced, concave, effuse, 

 extremities narrow, canaliculate. Length, -5 inch. 



Niphon, Japan, 60 fms., on Gorgonia. 



Is more coarsely striate than P. Pacifica, and umbilicated, also 

 differing in color. P. Californica is shorter and more globose, 

 with a thicker columella. 



P. PACIFICA, Pease. PI. 1, figs. 6, 7. 



Rather solid, oblong, much contracted in the middle, irregular 

 in shape ; radiately ornamented with elevated granulose striae, 

 decussated by concentric striae; apex straight, involute, im- 

 mersed ; wholly of either reddish, violet, purple or yellowish 

 color. Length, 8 mill. Ins. Apaian. 



Smaller than the next species, the apex oblique and not con- 

 tracted in the middle. 



P. ELEGANTISSIMA, Desh. PI. 1, figS. 8, 9. 



Ovate oblong, very convex on the back, elegantly transversely 

 striate, apex umbilicate ; vivid violaceous. Length, 6 mill. 



Isle of Bourbon, Mauritius. 

 P. Lienardi, Robillard, is a synonym. 



P. DECUSSATA, Gould. (Unfigured). Off Coast of Georgia. 



P. ALBIDA, Dall. (Unfigured). West Indies. 



P. (DENTIORA) RUBIDA, Pease. (ITnligiuvd). Sandwich Islands. 



