590 TEN YEAKS IN SWEDEN. 



opening. On this account they cannot attach themselves by 

 suction to any foreign object. 



183. A. BRANCHIALIS, Nilss. Linal. The Pride. D. F. 



Dorsals low, very wide apart ; upper lip ends in a 

 skin flap ; tail pointed ; colour blue-green ; length 

 4 in. to 5 in. 



Is very similar in general appearance to the young of the 

 river lamprey, with which it was formerly confounded. Is 

 met with in Finland, where it is considered as the young 

 of the river lamprey. Is found in small streams both 

 in the south and north of Scandinavia, but nowhere so 

 common as the last. I have taken them commonly in North 

 Wermland. 



G-KOUP 2. Hyperotreta, Mull. Nostrils lying on the top 

 of the nose, and leading into a canal which opens backwards 

 into the gums, over the gullet. 



Gen. Myxine, L. 



Body eel-shaped; encircled with a fin around the tail, but 

 no other fins on the body ; gill openings two, placed be- 

 neath ; mouth encircled with beards. 



184. MYXINE GLUTINOSA, L. Yanlig Piral. The Myxine. D. 



Red, tinged with violet; eight barbs around the 

 mouth, of which four are on the tip of the nose. Gene- 

 ral length 12 in. to 15 in. No outwardly apparent eyes. 

 Is very common in shoals on the Scandinavian coast, 

 from the south of the Cattegat up to the Polar circle. Off 

 the Gothenburg coast they live in twenty to fifty fathoms. 

 The myxine is produced from eggs which lie on the edge of 

 a tolerably broad web, along the right side of the bowels. 



GEOUP 3. Amphioxini, Mull. No nostrils ; mouth oblong, 

 without jaws or tongue. 



Gen. Branchiostoma, Costa. 



Body long; compressed on the sides, transparent; pointed 

 alike at each end ; has neither pectorals nor ventrals. On 



