280 PHOTINULA. 



are copied on pi. 44, figs. 14-17. Gould's figures of M. persica are 

 also given, pi. 44, figs. 23, 24. 



The color is sometimes pale yellowish-brown. 



P. SIGARETINA Sowerby. PL 39, figs. 34, 35. 



Shell orbicular-depressed, thin, smooth, reddish, whorls 3, tumid, 

 a little depressed above, the last large; suture inconspicuous; 

 aperture large, suborbicular, suboblique ; columella a little widened, 

 flat, arcuate, with an indistinct longitudinal furrow. (Sowb.) 



Port Famine, Sts. of Magellan. 



Margarita sigaretina SOWB., Mai. and Conch. Mag., i, p. 24 (1838) ; 

 Conch. 111., f. 14. SOWB., JR., in Rve., Conch. Icon., f. 10. 



P. RINGEI PfefFer. Unfigured. 



Shell rather solid, semipellucid, shining, bluish-white gray, 

 encircled above the periphery (rarely below) with very narrow lines 

 and bands of bluish-black ; subheliciniform, subdepressed-turbinate, 

 the apex acute ; whorls little convex, with moderate suture ; the last 

 whorl a little descending, a little flattened above, rounded beneath ; 

 aperture rounded-subquadrangular, upper, outer und lower margins 

 continuously curved, thin, acute, columellar oblique, passing with an 

 angle into the base. No umbilicus. Young specimens have a spiral 

 excavation at the place of the umbilicus, which becomes in the adult 

 evanescent, the umbilical tract being entirely occupied by a large 

 white callous, as in Rotella, and there is only a slight concavity in 

 the place of the umbilicus. The umbilical callous always remains 

 concave. A thin irregularly S-shaped callous connects the termina- 

 tions of the aperture. 



Alt. 12*3, diam. maj. 19, min. 14'5 mill. ; apert. lat. 9'6, long. 11*7 

 mill. (Pfe/er.) 



Straits of Le Maire, between Staten Id. and Tierra del Fuego, in 

 70 fms. 



Photinula Ringei GEORG PFEFFER, Verhandl. des Vereins f. 

 naturwissensch. Unterhaltung zu Hamburg, vol. vi, p. 113 (1887). 



This new species stands intermediate between the genera Rotella 

 and Photinula. It is nearest to P. coerulescens King, but that snail 

 is in general, as well as in each separate whorl, much more convex, 

 and resembles in the columella, which is not so oblique, the young, 

 rather than the adult of the new species ; and finally, the spiral 

 stripes extend over the entire surface of the last whorl in P. 

 cwrulescens. 



