582 



TRITONIAD^.. 



The nudibranclis of this family have laminated, plumose 

 or papillose branchiae arranged along the sides of the back. 

 The stomach in all is quite simple. 



TRITONIA, CuviER. 



Body prismatic, often thick and firm. Tentacles two, 

 ramose, and filamentous, more or less brush-shaped, retrac- 

 tile within tubular sheaths. Head with a tuberculated or 

 digitated veil. Branchite ramose, arranged in a single 

 series, along a ridge bordering each side of the back. 



The species of this genus sometimes grow to a large size, 

 and the first we have to notice is a giant among British 

 Nudibranchiata. 



] . T. HOMBERGi, Cuvier. 



Plate A. A. A. fig. 3. 



Tritwiia Homberffi, Cuvier, Mem. Moll. iv. 4, pi. 1 and 2. — Fleming, Brit. 

 An. p. 284. — Johnston, Ann. Nat. Hist. vol. i. pi. 114, 

 p. 3, f. 1,2. 



Body oblong, quadrilateral, the back slightly convex, 

 warty, of a general pink or purple colour, with bluish 

 markings, sometimes entirely of an amber yellow. Bran- 

 chise frondose and ramified, fringing in numerous close-set 

 tufts the angles of the back. Head-veil bilobed and much 

 fimbriated. Tentacles tufted, issuing from wide sheaths, 



