306 GASTROPODA. [Pectinibranchia. 



columella down to the canal, where it ends in a narrow and pointed 

 lamella, leaving a narrow chink at the base. The parietal wall is 

 sculptured by the continuation of the spiral ribs, the columella with 

 oblique narrow plaits and wrinkles. Operculum with terminal nucleus. 



Diameter, 5-3 cm. ; height, 9 cm. Angle of spire, 70. 



Type in the K.K. Hof museum, Vienna. 



Hob. Northern parts of New Zealand : Hauraki Gulf ; Bay of 

 Islands. 



The species is widely distributed. From the Mediterranean and 

 the West Indies by Africa and Brazil to the Cape of Good Hope, Aus- 

 tralia and New Zealand, Japan and Society Islands. 



Fossil from the Upper Miocene beds of Calabria onwards. Not 

 known fossil from New Zealand. 



Genus 2. CYMATIUM, Bolten, 1798. 



Cymnttum, Bolten, Mus. Bolten. (2), 1798, 129. Type : Murex femorale, L. 

 Lotorium, Montfort, 1810. 



Shell with triangular whorls, which are coronated ; aperture 

 mostly longer than the spire, the canal rather long and generally 

 straight ; outer lip dentated internally. Operculum with apical 

 nucleus. 



Distribution. Similar to that of Septa. 



KEY TO SPECIES. 



A. Shell large, height more than 5 cm. ; body-whorl with 



8 to 10 cinguli . . . . . . . . . . Spengleri. 



B. Shell rather small, height less than 5 cm. 



a. Spire about the height of the aperture ; body- whorl 



with 5 strong prominent cinguli ; canal straight . . exaratum. 



aa. Spire higher than the aperture ; body-whorl with 4 low 



and narrow spirals ; canal oblique and recurved . . Parkinsonianum. 



1. Cymatium exaratum, Keeve, 1844. Plate 44, fig. 14. 



Triton exaratus, Rve., P.Z.S., 1844, 116 ; Conch. Icon., ii, pi. 13, f. 50; Man. 

 Conch. (1), iii, 22, pi. 12, f. 102, 104. Lotorium cornutum, Perry, Index, 

 75 ; Hedley, P.L.S. N.S.W., 1902, 26, not of Perry ; Kesteveii, P.L.S. 

 N.S.W., 1902, 460, pi. 17, f. 10 (protoconch). 



Shell rather small, whorls flat-shouldered, canal moderately long. 

 Sculpture consisting of 2 prominent cinguli on the spire-whorls at and 

 below the shoulder, with a fine spiral thread in the groove, crossed 

 by distant radiate ribs, about 8 on a whorl, the points of intersection 

 raised into rounded nodules ; shoulder with 3 fine spiral threads ; 

 body-whorl with 5 prominent cinguli, and a number of smaller ones 

 upon the neck ; there are 2 high and rounded varices. Colour whitish, 

 variegated or banded with brown, or brown with a white median 

 band ; aperture white. Epidermis thin, horny, spirally striated. 

 Spire conoidal, gradate, about the same height as the aperture. Proto- 

 conch of 4- whorls, semitransparent, smooth. Whorls about 9, slowly 



