Plate LI. 



Fig. 1: Porbeagle (hurus cornubicus), ?, '/„ nat. size, from 

 Bohuslan. 



Fig. 2: Black-mouthed Dog-fish (Prisfiurus catulus), ?, V3 nat. 

 size, specimen caught in Kamso Fjord (N. Bohuslan), on the 

 25th of September, 1889. 



Fig. 3: Sagre (Etmopterus spiiiax), <f, ',j nat. size, specimen 

 caught at a depth of 40—50 fathoms, in Stromstad Fjord, on 

 the 10th of November, 1881. 



Fig. 4: Bough Hound (ScylHorhinus canicula), ?, " ,„ nat. size, 

 from the North Sea, 4th November, 1889. 



Plate LI I. 



Fig. 1 and 2: Picked Dog-fish (Squalus acanthias), from Bo- 

 huslan; (f (fig. 1), ''4 nat. size, caught in the month of November, 

 1886; 9 (fig. 2), ''5 nat. size. 



Fig. 3 : Greenland Shark (Acanthorhmus carcharias)^ ?, '/.g nat. 

 size, from Bohuslan. 



Plate LIII. 



Fig. 1 : Lamprei/ {Petromyzon marinus) ?, '3 nat. size, caught 

 at Ringkjobing (Jutland), on the 19th of May, 1890. 



Fig. 2 — 4: Lampern (Petromyzon fluciaUlis), from Elfkarleby 

 (River Dal), caught early in October, 1891. Fig. 2: adult ?, 

 '/j nat. size; below the figure may be seen the oral (sucking) 

 disk, nat. size, with its teeth: a/, anterior (maxillary) teeth; /»<, 

 posterior (mandibulary) teeth; alt, anterior, mlt, middle and pit, 

 posterior lateral teeth; aln, anterior lingual teeth; est, external 

 and ist, internal suctorial teeth. Figs. 3 and 4: two larvae (Prides, 

 Ammoccetes) caught together with the preceding specimen. 



Fig. 5: Glutinous Hag {Myxine ghitinosa), ^4 nat. size, from 

 Bohuslan. 



Fig. 6: Lancelet (Branchiostoina lanceolatuin), nat. size, from 

 Bohuslan, 23rd May, 1838. 



