PETALIFERA. 131 



Shell thin and transparent, with well-marked but irregular growth 

 strise. It is not enclosed by the mantle, and seems to be attached 

 by the beak only. 



Nice (collected in September). 



Aplysia brugnatellii VANB. & ROBE, Guerin's Mag. de Zool., 

 1836, classe v, pi. 77, f. 1, 2, p. 1 ; Ann. Sci. Nat., 1835, p. 251. 



The species most approaching A. brugnatellii is the A. ferussacii 

 of Rang. It is distinguished from that by the depressed, rounded 

 tail, and the coloring, dappled with orange dots, ferussacii being 

 spotted with black. 



It is notable that this species has buccal appendages such as 

 Fischer describes for his Phyllaplysia lafonti. 



P. ORNATA Deshayes. PL 36, fig. 3. 



Length 35 mill. Dark green above, ornamented with numerous 

 oval yellow spots ; rhinophores flesh colored, spotless ; anterior ten- 

 tacles spotted like the body. 



Algerian coast. 



Dolabella ornata DESH., Traite Elementaire de Conchyl., ii, p. 57, 

 atlas, pi. 89, f. 5. FREDOL, Le Monde de la Mer. pi. 11, f. 10. 

 Phyllaplysia ornata FISCHER, Journ. de Conchyl., 1872, p. 297. 



This form is known by Deshayes figure only, no description hav- 

 ing been published. It may prove to be a synonym of A. brugna- 

 tellii ; indeed I have very little doubt that they are identical. 



Section PSEUDAPLYSIA Pilsbry, 1896. 



External features as in Petalifera; labial palpi developed. Shell 

 ovate claw-shaped, with the sinus obsolete ; rhachidian tooth five- 

 denticulate, inner lateral with trilobate, the rest with broad bilobate 

 cusps. 



Differs from Phyllaplysia in the five-lobed, instead of three-lobed 

 median tooth of the radula, and the presence of a well-developed 

 shell. From Petalifera it differs in the form of the lateral teeth 

 and the oblong shell without a posterior sinus. 



P. PUNCTULATA Tapparone-Canefri. PL 36, figs. 4, 5, 6, 7. 



Length 17-25 mill., width 6-6 mill. Body flattened, narrow, 

 much lengthened, somewhat narrowed behind. Head and neck 

 short, anterior tentacles hollow, their bases rather distant, apices 



