Zoological Society. 55 



lections formed with so much scientific ardour and discrimination by 

 His Imperial Highness the Due de Leuchtenberg, during his late six 

 months' residence in Madeira. 



Fam. Balistid^. 



16. MoN ACANTHUS AURIGA. Hispidus, cttudtt utritique dense 



hispido-villosa ; pallide olivaceo-murinus, sublutescens, fusco- 

 lutoso-maculatus v. interrupte longitudinaliter subfasciatiis ; 

 fasciis luteis inconspicuis evanescentibus 3 v. 4 ab oculis antice 

 oblique radiantibus ; radiis \ v. 2 anticis dorsalis primce ali- 

 quando in filamentum productis . 

 l^-D. 1; 2d«D. 31; A. 30 V. 31; P. 13v. 14; C. l+X. + l. 

 From eight to ten or eleven inches long. On each side, towards 

 the base of the caudal fin, is an oblong patch, like plush or velveteen, 

 of close thickset hairs or bristles. The occasional production of the 

 second or first two rays of the second dorsal fin is perhaps sexual. 

 Such examples have the muzzle rather longer and more produced be- 

 fore the eyes than those which have not the elongated dorsal fila- 

 ment. They are perhaps the M. Jilamentosus of M. Valenciennes, 

 to whose figure and description, however, in MM. "Webb and Berthe- 

 lot's ' Canarian Fishes,' I regret I have not access. 



Several examples have occurred, chiefly in the autumn, during the 

 last five or six years, of this previously in Madeira unobserved or un- 

 recorded species. 



SQUALID.E. 



Fam. Alopecid^. 



17. Alopias vulpes, Buon. {The Fox Shark, Yarr. ii. 379.) 

 An example occurred this spring of unusual size, measuring eighteen 



feet in length, of which the tail was ten feet. The skin was preserved 

 by the Due de Leuchtenberg. 



Fam. Spinacid^. 



18. Centrophorus squamosus, Miill. und Henle, p. 90, with a 

 figure. 



The Ramudo or Raimudo of Madeira, not unfrequently taken off 

 the Dezertas at a depth of twelve or fourteen "linhas" i. e, from 350 

 to 400 fathoms, belongs apparently to the above species, the habi- 

 tat of which was unknown to its describers, MM. Miiller and Henle. 

 I have only examined female examples, and the fishermen profess 

 themselves to be entirely unacquainted with the male, which I have 

 however formerly (March 10, 1838) once seen, though without oppor- 

 tunity for a close or accurate examination, and so perhaps without re- 

 marking any spine near the tips of the claspers or ventral fin-append- 

 ages. The individuals examined were five or six feet long, but the 

 fish is said to grow to a much larger size. 



Madeira, May 25, 1850. 



