208 SYSTEMATIC ARRANGEMENT 



b. Lingual membrane broad. Teeth in many longitudinal series 



(p. 206). 



Fam. II. DORIDIDjE. 



Teeth, in many longitudinal series, in each cross series nearly simi- 

 lar ; the inner often smaller. Body convex. Mantle large, convex, 

 covering the head and margining the foot, without any marginal 

 appendages. Dorsal tentacles two, retractile within cavities ; oral 

 tentacles two, various or wanting. 



Lingual membrane broad, flat or channeled, received within the 

 throat ; central series often toothless ; lateral series of teeth some- 

 times very numerous. 



" We are inclined to think these denticles are siliceous in compo- 

 sition, as they resist the action of the stronger mineral aoids, as do 

 those of Eolis, which, although they possess the same hardness, 

 transparency and polish, are in some measure affected by hydro- 

 fluoric acid." — Hancock $• Embleton, Phil. Trans. 1852, 211. 



* Gills retractile into a common cavity. Tentacula dorsal, distinct. 



1. Glossodoris. 



Mantle largely tubercular. Dorsal tentacles conical, laminated, 

 partially retractile, and protected by leaf-like appendages ; oral ten- 

 tacles linear or tubercular. Gills linear, simply pinnate. Lingual 

 spines simple, uniform ; no central spine. 



1. G. verrucosa, t. 65. f. 1, t. 236. f. 1. 



2. G. Bertholeti, t. 218. f. 1. 



3. G. D'Orbignii, t. 216. f. 2. 



2. Chromodoris. 



Body subquadrangular. Mantle narrow, exposing the foot, smooth . 

 Dorsal tentacles laminated, retractile within plain or marginated . 

 cavities ; oral tentacles conical or tubercular. Gills linear, simply 

 pinnate, retractile ? Tongue ? 



1. C. magnifica, t. 64. f. 2, t. 67. f. 17. 



3. ACTINODORIS. 



Mantle large, flat, tubercular. Gills strap-shaped, cut or forked 

 at the tip, retractile into a common cavitj\ Teeth ? 



1. A. flammulata, t. 234. f. 2. 



2. A. scabra, t. 66. f. 1. 



3. A. cruenta, t. 66. f. 3, 4. 



4. A. maculosa, t. 66. f. 5. 



5. A. fumosa, t. 216. f. l=Doris Incii, t. 226. f. 1. 



6. A. sordida, t. 213. f. 3. 



7. A." punctata, t. 64. f. 5. 



8. A. Mauritiana, t. 234. f. 1. 



