402 Zoological Society. 



fish under the name of T. marmorata, Risso, this genus has received 

 from MM. Miiller and Henle, authorizes the proposal of it as a di- 

 stinct and seemingly new species. It agrees with T. marmorata in 

 the shape and relative proportions of the body-disc, the tail and cau- 

 dal fin ; but the distance from the root of the ventral fins to their free 

 hinder edge considerably exceeds the distance from their hinder edge 

 to that of the caudal fin ; the teeth of the spiracles are not less de- 

 veloped in full-grown fishes of a foot and a half in length than in 

 younger examples ; and lastly, the colours are liable to no variation, 

 and are very different from those of any of the varieties of T. mar- 

 morata enumerated by MM. Miiller and Henle. I regret I am un- 

 able at the present moment to compare the dentition with that of 

 T. panthera (Ehr.), Miill. und Henle, Nachtr. p. 193. 



Torpedo hebetans, Syn. p. 195 (Raia hehetans, Miill. und Henle, 

 Nachtr. p. 194), in the remarkable notch on each side at the outer 

 extremity of the front margins, most resembles T. nobiliana (Buon.), 

 Miill. und Henle, p. 128. The disc of the body however was an 

 inch broader than long, and the colours were too different in the only 

 example (a male) which has yet occurred of the Madeiran fish to 

 allow, without more evidence, its junction with this or any other 

 Mediterranean species. 



Raia Maderensis, Syn. p. 195. I am not quite prepared to acqui- 

 esce in MM. Miiller and Henle's reference of this to R. iindulata or 

 mosaica, Auct. (See Miill. und Henle, p, 134, and Nachtr. p. 194.) 

 The Madeiran fish is generally more or less completely rough be- 

 neath, and always coarsely shagreened all over on the upper surface. 

 However, this discrepancy with their account of R. undulata might 

 be due to the small size of their specimens ; but there is also still 

 some further disagreement with regard to the large prickles in the 

 middle of the back ; and the colours, which are constant in the Ma- 

 deiran fish, agree only with their var. 3. 



Raia oxyrhynchus (Will.), Suppl. Mad. Fish. p. 92 (see Miill. und 

 Henle, 2'^'^'' Nachtr. p. 200) is truly the R. oxyrhynchus, Linn., of 

 Miiller and Henle, p. 148, as distinguished from the nearly allied 

 R. lintea of Fries. 



Pteroplatea hirundo. p. glabra, supra unicolor hepatina, ros- 

 tra vix prominulo, pinnis pectoralibus margine anteriore utringue 

 convexo, dein apices versus concaviusculo, corpore (postice convexo) 

 plus duple latiore guam longo, cauda brevissima dimidio corporis 

 breviore, subtus linea elevata carinata, supra simplici, apicem ver- 

 sus quadrangulari : tentaculis pone spiracula nullis. 



Trygon altavela, Suppl. in Proceed., p. 92; in Trans, iii. p. 20; 

 omisso synon. Cf. Miill. und Henle, 2*" Nachtr. p. 200. 



Judging from MiVI. Miiller and Henle's account of the species of 

 this genus, the Madeiran fish is not only distinct from the Mediter- 

 ranean TTTtpvKXciTe'ia of F. Columna, to which I formerly referred it, 

 but from every other. It differs from Pt. altavela, Miill. und Henle, 

 in the uniformity of colour of the body and tail above ; in having the 

 fore margin of the wings convex ; in their greater wddth from point 



