PORBEAGLE. 
1139 
p. 8 (Mem. Acad, Roy. Sc. Belg., tom. XXXVIII, 1871); 
Coll., Forli. Vid. Selsk. Clirnia 1874, Tilltegsli., p. 208; 
Malm, Gbgs, Boh. Fna, p. 618; Mob., Hist. Nat. Poiss. 
Fr., tom. I, p. 296; Doderl., Man. Ittiol. Medit., fasc. 
II, p. 60.; Mela, Vert. Fenn ., p. 365, tab. X; M5b., Hcke, 
Fiscli. Osts., p. 151; Jord., Gilb., Bull. U. S. Nat. Mus., 
No. 16, p. 30; Day, Fish. Gt. Brit., Irel., vol. II, p. 297, 
tab. CLVI; Storm, Norsk. Vid. Sels. Skr. 1883 (Trondhj. 
1884), p. 44; Lillj., Sv., Norg. Fna, Fisk., vol. Ill, p. 620; 
Car., Prodr. Face Medit., vol. II, p. 505. 
Squalus nastts, Walb., Ichthyol. Art., Gen., p. 517. 
Squalus monensis , Shaw., Gen. Zool., vol. V, p. 350; Cuv., 
1. c. ; Yarr., 1. c., p. 387. 
(?) Isurus Oxyrinchus , Rafin., Caratt. Ale. N. Gen. e Spec., 
p. 12, tab. XIII, fig. 1 (fide Doderl., figura tainen pessima 
fere potius ad Isurum Spallamanii referenda). 
Fig. 329. Teeth of the upper and lower jaws in a Porbeagle (Ism 
teeth behind the gap (diastema) on tl 
Squalus Selanonus, Leach, Mem. Wern. Nat. Hist. Soc., vol. II, 
p. 64, tab. II, fig. 2; Flmng (Squ. selanoneus), Brit. Anim., 
p. 168 = Selanonius Walkeri, p. 169. 
The Porbeagle ranks among the larger Sharks. Its 
ordinary length in Scandinavia, however, does not ex- 
ceed 17,-27, m. In the Mediterranean it attains a 
length of at least 6 m.“ 
The body is almost terete, slightly compressed, 
rounded above and below, and pointed at each end. 
The greatest depth varies between about 1 / 6 and x / 7 of 
the length. The skin is everywhere rough as a tile 
when stroked from behind, but not exactly rasping; in 
the opposite direction it is soft to the touch. This is 
due to the small, dense scales, which in a Porbeagle 
13 dm. long are only x / 2 mm. broad. On the upper 
parts of the body they are semicircular and thick, with 
5 elevated, convex s trial, the ends of which project at 
the margin of the scale, forming rounded denticulations. 
On the under side of the body they have only 3 such 
ridges. On the tins they are set with equal denseness, 
but are smooth, as it were worn. 
The head, like the body, is without prominent side- 
margins. The snout in front of the eyes and mouth 
is conical, its depth at the mouth being almost equal 
to its length. It is densely punctated (tig. 330) with 
a 
us cornubicus) 213 cm. long, ] / 3 nat. size; a, the first three pairs of 
: right side of the upper jaw, nat. size. 
distinct, impressed, muciferous dots, the mouths of 
Lorenzinian ampulla?, distributed in 6 broad, multiplex 
rows, which are separated by the same number of im- 
punctate stripes, one in the median dorsal line, one 
vertically below this, and two on each side, all con- 
verging at the tip of the snout, which is also without 
punctures. Below the eye lies another row of similar 
dots. The eyes are round, closely bounded by the 
slightly oblong orbital margins. Their diameter is some- 
what less than V 3 (27 — 31 %) of the length of the snout. 
In a dead specimen the pupil appeared to be somewhat 
oblong and obliquely set. There is no nictitating mem- 
brane. The nostrils are ^-shaped and transversal, with 
“ Bonaparte even states “12 up to 20 or 24 feet,” perhaps confounding the species with Carcharodon Rondelelii. 
