416 SYNOPSIS. 



Sp. 224. M. Icevis. Smooth Hound. Dorsal fins rather large, 

 particularly the first ; upper lobe of the tail smaller than 

 in Galeus vulgaris ; surface rather smooth ; colour of the 

 upper parts pearl-grey, under parts yellowish white ; the 

 back and sides with longitudinal rows of small circular 

 white spots, most conspicuous in young specimens. — Cuv. 

 Reg. An.; Yair. Brit. Fish., ii, p. 512. Squalus mustelus, 

 Linn., Jenyns'' Brit. Vert, 502. 

 G-KN. ex. Lamna. Dorsals two, first high and large, second 



small and opposite the anal ; branchial openings all before the 



pectorals ; nostrils beneath the snout, the latter pyramidal ; 



skin smooth; teeth triangular, smooth and sharp, having a 



single denticle on each side at the base. 



Sp. 225. L. Comubica. Porbeagle, or Beaumaris Shark. Body 

 very narrow at the tail ; snout with a series of punctures 

 on each side of the forehead, several others behind the 

 eyes, and a cluster before the nostrils ; first dorsal with a 

 free pointed process behind it ; tail lunate, the upper lobe 

 largest ; skin smooth when stroked backwards ; colour 

 greyish black, belly white. — Cuv. Beg. An.; Yai^. Brit. 

 Fish., ii. 515. Squalus Cornubicus, Penn. Brit. Zool., iii. 

 p. 152 & 254, pi. 20; Dm. Brit. Fish., pi. 108. 

 Gen. CXI. Selachus. Dorsals two, the first a little behind 



the line of the pectorals, the second over the middle of the space 



between the ventrals and anal ; branchial openings very large, 



almost encircling th'e neck ; teeth not denticulated at the sides. 

 Sp. 226. S. maximus. Basking Shark. Snout short and 

 rather blunt, pierced full of small holes ; pectorals some- 

 what triangular ; all the fins comparatively small ; upper 

 lobe of the tail not remarkably larger than the under ; skin 

 thick and rough, the colour brownish black, with blue 

 tints. — Ciw. Reg. An.; Yarr. Brit. Fish., ii. 518. Squa- 

 lus maximus, Linn., Pemi. Brit. Zool., iii. p. 134, pi. 16. 

 Gen. CXII. Alopias. Upper lobe of the caudal nearly as 



long as the body ; the other fins resembling those of Lamna ; 



cutting edges of the teeth smooth in both jaws ; branchial 



openings small. 



