130 



SYSTEMATIC ARRANGEMENT 



2. Pterocera. 



Shell : outer lip produced into tubular spines which sheath the 

 lobes produced on the edge of the mantle when the animal arrives at 

 adult age ; in old specimens these lobes are retracted, and the 

 sheaths then become solid spines. 



1. P. truncata, t. 70. f. 5, t. 79. 



2. P. Lambis, t. 1. f. 2<?, f . 1 ? . 



Quoy represents the teeth on the tongue of the sexes of Pterocera 

 Lambis as different (see male, t. 49. f. 20) from those of the female 

 (t. 50. f. 8), the former having one, and the latter two lateral teeth on 

 each side ; the latter appears more correct, but he appears to have 

 overlooked the interior lateral, and in the former the two internal 

 lateral teeth. 



** Sinus of the outer lip close and confluent with the canal. 

 3. Fusus. 

 Shell fusiform ; outer lip dentated. 



1. F. clavus, t. 80. 



2. F. subulatus, t. 84 a. f. 6. Gadius fusus, Adams, Gen. Moll. 



t. 27. f. 3. 



b. Seraphina. Tentacles, nonet Operculum horny, claw-like, with 

 three claws. Shell : outer lip simple. Shell truncated in 

 front, without any distinct sinus or canal. 



4. Seraphys. 

 Shell subcylindrical ; spire conical. Mouth linear, truncated ; 



inner lip smooth. Teeth ? Operculum three-clawed. — Adams, 



Gen. Moll. t. 27. f. A a. 



1. S. Terebellum, t. 82. f. 3, t. 84 a. f. 3 ; Adams, Gen. Moll. t. 27. 

 f. 4. 



II. Eyes sessile. 



Fam. II. PIIORID.E. 



Muzzle conical, produced. Eyes sessile, on the outer side of the 

 base of the subulate tentacles. Foot small, dilated in front. Shell 

 conical, depressed. Operculum large, subannular, horny (fig. 66). 

 Teeth ? 



1. Phc-RUS. Fig. 66. 



Operculum triangular, annular ; apex acute. — Operculum of Phorus. 

 Adams, Gen. Moll. t. 40. f. 2 a, b. 



1 . P. conchyliophorus. 



2. P. solaroidea (Xenophora s.), Adams, Gen. 



Moll. t. 40. f. 2. 



