312 GASTROPODA. [Pectinibranckia. 



Subgen. 1. CASSIDEA (Bruguiere), Swainson, 1840. 



Cassidea, Bruguiere, Encycl. Meth., i, 1789, p. xv ; 1792, 414 : Swainson, 

 Malac., 1840, 299. Type : Cassis vibex, L. Casmaria (in part), H. and 

 A. Adams, 1853. Cassidea, Swains. : W. H. Call, U.S. Geol. Survey., 

 Professional Paper 59 '' The Miocene of Astoria and Coos Bay, Oregon," 

 1909, 61. 



Shell ovate, smooth, polished, with only a terminal varix ; body- 

 callus smooth and adherent throughout. 



1. Phalium labiatum. Perry. 1811. Plate 40, fig. 12. 



Cassidea labiata, Perry, " Concholog}^" 1811, pi. 34, f. 1. Cassis achatina, 

 Lamarck, 1822; Conch. Icon., v, pi. 10, f. 28a ; Man. Conch. (1), vii, 

 278, pi. 8, f. 94. 



Shell of moderate size, ovato-acute, ventricose, smooth, sub- 

 perforate, polished. Sculpture : Quite smooth or ornamented with 

 1 spiral series of nodules. Colour light brown or cinereous, longi- 

 tudinally flamed with dark chestnut, often with narrow spiral bands 

 of chestnut and white articulations ; mouth pale purple ; outer lip 

 white, banded with brown. Spire not high, conical, a little more 

 than one-third the height of the aperture ; outlines slightly convex. 

 Protoconch small, obtuse, of 1^ smooth whorls. Whorls 6, first very 

 slowly then more rapidly increasing, flatly convex ; base convex. 

 Suture deep. Aperture subvertical, moderate, pyriform, narrowly 

 channelled above, with a very short, deep, open canal at the base, 

 which is sharply curved. Outer Up thick, with a sharp edge on the 

 outside, inside rounded, smooth, subdenticulate towards the base. 

 Columella subvertical, thick and rounded, with a few small folds, 

 a groove, followed by an elevated ridge below. Inner lip spreading 

 as a thick polished callosity far beyond the columella, bearing a few 

 indistinct folds, and leaving only a narrow umbilical chink ; the basal 

 lip is continued from the canal in the groove behind the neck, and 

 enters the umbilicus as a narrow sharp ridge ; the inner lip forms 

 a very thin callosity on the parietal wall below, but is getting thick 

 and prominent on the outside on approaching the outer lip. Operculum 

 as described for the family. 



Diameter, 40 mm. ; height, 60 mm. Angle of spire. 85. 



Animal unknown (?). 



Type of C. achatina in the Mus. Hist. Nat., Geneva. 



Hob. Northern parts of New Zealand, rare ; Omaha ; Whangarei 

 Heads (C. Cooper) ; Kermadec Islands (Captain Bollons). Australia, 

 Cape of Good Hope, &c. 



Subsp. pyrum, Lamarck, 1822. Plate 40, fig. 13. 



Cassis pyrum, Lam., A.s.V., vii. 1822, 226 ; Man. Conch. (1), vii, 278, pi. 8, 

 f. 96-98 ; Conch. Icon., v, pi. 11, f. 29. C. nivea, Brazier, P.Z.S., 1872. 

 616, pi. 44, f. 1. C. striatus, Mutton, C. Tert, M., 8. C. tumida, Petterd, 

 P.R.S. Tas., 1885, 321. 



Shell moderately large, ventricose, ovate, with more or less dis- 

 tinctly angled and nodulose whorls. Sculpture consisting of a row of 



