370 Survey of Fishing- Grounds, West Coast of Ireland, 1890—1891. 



condition exhibited by the specimens before us, in which the pectoral extremities 

 are considerably short of those of the pelvis. 



Judging by the variation which we have shown to exist in the interspace 

 between the dorsals, this character may not always avail to distinguish between 

 C. monstrosa and C. affinis, but the great space existing between the pectoral and 

 pelvic in C. affinis, causing the former to terminate much in advance of the 

 latter, at once separates the Portuguese species from any other that has been 

 described. 



PLAGIOSTOMATA. 



Selachoidei. Sharks 



Fam.— CARCHAEIID^. 

 Genus Galeus, Cuvier. 



Galeus vulgaris, Fleming. The Tope. (Deep-sea.) 



Galeus vulgaris, Holt, " Sci. Proc. Roy. Dub. Soc," vii., p. 219. 



Examples were trawled at 154 fathoms, off the Coast of Mayo, on the 20th 

 April. The tope was also met with in abundance in shallow water, usually in 

 company with Acanthias vulgaris, and sometimes with Scyllium canicula. Though 

 we believe that all three species are commonly caught by line-fishermen on the 

 Faroe "Banks" at depths exceeding 100 fathoms, we know of no record earlier 

 than that referred to above, which definitely includes them among the deep-sea 

 fishes. 



Fam. — SC YLLIID^. 

 Genus, Scyllium Cuvier. 



Scyllium canicula, Cuvier. The Lesser-spotted Dogfish. (Deep-sea.) 

 Scyllium canicula, .... Holt, " Sci. Proc. Roy. Dub. Soc," vii., p. 219. 



At 154 fathoms off the coast of Mayo. Common in littoral waters. 



