. REPORT OF COMMISSIONER OF FISH AND FISHERIES. 



death of the fish on which they were found. It is probably a common 

 and widely-distributed species. 



I have considerable hesitation in referring this and the next species 

 to the genus Lermcopoda.) which is usually restricted to parasites of 

 marine or partially marine fishes. Our species certainly do not agree 

 generically with the typical species of Achtheres, described and figured 

 by Nordmann, while they seem to agree very well with species of Lernce- 

 opoda described by Kroyer. It is possible our species may belong to 

 Basanistes, but in all external characters they seem to differ widely. In 

 fact, the species of this group have many of them been so poorly 

 described that it is very difficult to make out what the characters of 

 genera really are. The European species, ujion which most of the genera 

 are based, need careful revision. 



Lern^opoda siscowet, sp. nov. (Pkxte III, fig. 15, fig. 16, details.) 



Female. — Head not more than half as long as the body. Body short, 

 but little longer tUan wide, semi-anuulated bj" three or four obscure con- 

 strictions on the ventral side, and the posterior extremity extending 

 only slightly beyond the bases of the ova-sacs. Prehensile maxillipeds 

 fig. 16, h) proportionally smaller than in the last species; the penulti- 

 mate segment with a process upon the inside terminated by two small, 

 papilla-like appendages, (fig. 16, b';) the terminal segment regularly 

 curved from the base to the acute tip, and armed on the under side 

 near the tip with a spinous prominence. Arms about as long or con- 

 siderably longer than the bady, slender, nearly straight; bulla with 

 a distinct petiole and a broadly-expanded margin. Ova-sacs longer 

 than the head and body together, linear, with twenty to thirty longi- 

 tudinal and about four transverse series of eggs. 



The antennuke are a little longer than in the last species, and 

 the antennae and palpi are quite similar to the antenniie and palpi of 

 that species. The mandible, (fig. 16, a,) on one side, at least, is broad 

 toward the base, and is armed with four stout distal, and one, or possi- 

 bly two, small proximal teeth. 



Entire length of a specimen, from mouth to extremities of ova-sacs, 

 IS"'"'; length of body, 5'"™; diameter of body, 3'""'.2; length of ova-sacs, 

 8""" .3; diameter of ova-sacs, 1'""'.2. 



This species was found upon the siscowet {Salmo siscowet) at Outer 

 Island, Lake Superior, by Mr. J. W.Milner. 



Lern^opoda (?) GoREGONi, sp. nov. (Plate III, fig. 17.) 



Head more elongated than in the preceding species. Body elon- 

 gated and with some obscure indications of annulation, due perhaps 

 to contraction in alcoholic specimens. The prehensile maxillipeds 

 (fig. 17, a) reaching nearly as far forward as the mouth ; the basal 

 portion very stout ; the terminal portion slender, cylindrical, flexible, 

 and armed at the extremity with a minute, strongly-curved hook, 

 (fig. 17, a'.) Arms slender, but shorter than the body; the bulla with 



