578 TEN YEASS IN SWEDEN. 



Tail fin altogether absent. 



160. S. OPHIDION, L. Lilla Hafsnal. The Straight-nosed 



Pipe Fish. F. D. 



Nose round, straight from the point to the middle 

 of the eye, just as long as from thence to the edge of 

 the opercle ; anus under the front division of the dorsal, 

 which is nearly double as long as the head ; length 

 6 to 8 in. ; number of side plates from the gill openings 

 to the vent 30 ; dorsal fin with 36 rays. 

 Common on the coast of the Cattegat and Baltic. 



161. S. LUMBKICIFORMIS, Yarr. Krum Nosade Hafsnal. The 



Worm Pipe Fish (Pennant). D. 

 Nose bent upwards at the point; length from the 

 tip to the middle of the eye shorter than from thence 

 to the edge of the gills; anus lies in front of the 

 middle of the dorsal, which is a little longer than the 

 head; length 5 to 6 in. ; dorsal with 26 rays. 

 This is, no doubt, identical with YarrelFs worm pipe 

 fish, but Nilsson's opinion is, that the S. anguincus, Jenn., 

 the snake pipe fish of Yarrell, is nothing more than the 

 young of the aequoreal pipe fish. 



The worm pipe fish is met with both in the Cattegat and 

 North Sea off the coast of Norway. 



Professor Fries has made the following interesting re- 

 mark on the change which takes place in the young pipe 

 fish during their growth, viz., that they are born with 

 pectorals, the whole tail is encircled with a fin-like web, 

 and the gills are large as in other fish. 



PLECTOGNATHI. FISHES WITH SOLDERED JAWS. 

 Maxillaries and premaxillaries grown together. 



Gen. Ortliagoriscus. 



Body compressed, short ; with the tail so short as to 

 give it the appearance of a fish cut in two ; skin rough, 

 but not spinous; dorsal and anal fins high and pointed, 

 uniting with the caudal. 



