TYLODINA. 187 
calleuse, patelliforme, 4 tentacules, les 2 postérieurs éloignés et plus 
grands, branchies dorsales sous la coquille & droit, anus a la droit du 
cou. TJ. punctulata pointillé de brun, tentacules obtus; coquille 
lisse.” 
Gray’s T. atlantica, collected by McAndrew at Canary Is. (erro- 
neously said by Gray to be from Madeira), is thus described: ‘‘Shell 
solid, bright yellow; periostraca —? ” 
Parmophorus patelloideus Cantraine has also been referred to Um- 
braculum mediterraneum, young; but I do not know that Can- 
traine’s type has been compared with either that species or the 
present one. 
T. RAFINESQUII Philippi. PI. 73, figs. 84, 85. 
Shell elevated-conical, rounded-ovate, white, but covered by a 
yellowish cuticle; smooth, showing but slight growth-lines. 
Length 10, breadth 83, alt. 6 mill. 
Catania and Palermo, Sicily (Phil., Arad. & Ben.) ; Adria-Zara 
(Brusina); Algeria (Weinkauff), in laminarian and coralline 
zones. 
Tylodina rafinesquii Puiy., Enum. Moll. Sicil., i, p. 114, pl. 7, f. 
8a, b (1836); ii, p. 89—ARApDAs & Benorr, Conchigliologia viv. 
mar. della Sicilia, p. 122.—Monrerosaro, Nuova Rivista Conch. 
Medit., p. 49.—T. raffinesquet Phil., Wretnkaurr, Conch. Mittelm., 
ii. p. 178.—T. citrina Locarp, Coq. Mar. des Cotes de France, 
1892, p. 18, f. 4. 
The shell of this species is rounder and more elevated than that of 
T. citrina. 
T. DEUBENU Loven. 
Shell ovate, depressed-conic, obsoletely angulate-radiate, with 
nearly two sinistral nuclear whorls at the recurved apex. Animal 
oblong, the head without a rostrum, deeply slit in front into lanceo- 
late lobes; with ear-shaped vibracula; gill on the right side, the 
subtubular anus behind it; foot strong, thick, the sole ovate. Color 
of animal and epidermis purple, 10:7 by 8°5 mill. 
Ceast of Norway. 
T. duebenti Loven, Ind. Moll. lit. Seand. oce., p. 19. 
This unfigured species is mentioned by Sars (Moll. Reg. Arct. 
Norv. p. 363), but no additional information has been published so 
so far as I can find. 
