230 SYSTEMATIC ARRANGEMENT 



1. A. corrugata, t. ] 77. f. 2 ; Forbes fy Hanley,B.M. t. C.C.C. f. 5. 



2. A. senestra, t. 199. f. 4. 



§§ Tentacles linear. 



3. Ictis. 



" Body oblong ; back elevated; head slightly angulated, bearing 

 two linear tentacles on the dorsal aspect, behind and exterior to which 

 are the eyes ; vent a little behind the centre of the back." Teeth 



1 



1 . I. Cocksii, t. 1 77. f. 1 ; Forbes $■ Hartley, B. M. t. C.C.C. f. 6. 



4. Fucola. 



Teeth ? 



1. F. rubra, t. 180. f. 13. 



. r >. Pelta. 

 Teeth, ? 



1. P. coronata, t. 199. f. 6. 



Fam. XXII. PHYLLIRRHOIDjE. 



Tentacles two, dorsal, linear, elongate, retractile. Head distinct. 

 Tail compressed, truncated. Mouth with jaws. Body compressed. 

 Lingual membrane with a single central series of plates with nume- 

 rous denticles. Vent lateral.— See leuckart, Arch. Naturg. 1853, 

 243, and Krohn, Arch. Naturg. 1853, 278. 



1. Pl-IYLLIRRHOE. 



Tentacles elongate, subulate, spirally twisted ; body vertically com- 

 pressed ; gills, none external ; jaws distinct. 



1. P. bucephala, t. 12. f. 4, t. 15. f. 6 ; Foy. Bonite, t. 24, anat. 



2. P. Lichtensteinii, t. 153. f. 4. 



3. P. amboinensis, t. 153. f. 3. 



4. P. roseum, t. 153. f. 2. 



5. P. punctulatum, t. 153. f. 1. 



6. P. rubrum, t. 153. f. 5. 



