608 PROCEEDINGS OF THE NATIONAL MUSEUM. vol. 47. 



margin; the former Anth a short and stout spine or peg on its ventral 

 surface near the base of the terminal claw. This spine is not in line 

 with the terminal claw but the latter shuts past it dorsally. 



Male. — ^Unknown. Color a uniform yellowdsh-white ; bulla bluish 

 or light purple. Total length (without egg strings) 7 to 8 mm.; 

 breadth, 3 mm.; length of arms, 5 mm.; of bulla, 1.5 mm.; of egg 

 strings, 6 mm. 



(salmonea, of or pertaining to salmon). 



RemarJcs. — ^This species has been described by so many authors 

 that very little is left to be added. Attention, however, is called 

 to the fact that the median projection at the posterior end of the 

 body is not an abdomen but a genital process hke that in Clavella. 

 Also the "two apical knobs" mentioned by some authors are really 

 spermatophores (see fig. 22). The bulla is veiy pecuMar in its appli- 

 cation to the gill filament, as well as in its shape and orientation. 

 The peculiar pattern of the dorsal surface of the head is a good char- 

 acteristic of the species, and this with the bulla affords a ready 

 means of identification. These points, together with the peg on the 

 maxilUpeds, are the chief reasons for presenting the figures here given. 



SALMINCOLA SISCOWET (Smith). 

 Plate 30, figs. 23 to 29. 

 Lemaeopoda siscowet Smith, 1874, p. 6G4, pi. 3, figa. 15-16. 



Host and record of specimens. — Seven adult females Avith egg 

 strings were taken from the gills of Cristivomer namaycush siscowet 

 at Outer Island, Lake Superior, by J. W. MUner. They are num- 

 bered 39597, U.S.N.M. and are labeled in Professor Smith's hand- 

 writing '' Lernaeopoda siscowet Smith, Cqtypes." 



Specific characters of female. — Cephalothorax ovate, flattened dorso- 

 ventrally, coming to a rather sharp point anteriorly, and thickened 

 posteriorly through the bases of the arms so that it overhangs con- 

 siderably the trunk, from which it is separated by a very distinct 

 groove. Dorsally the cephalothorax is strongly arched, while ven- 

 trally the large maxiUipeds stand out prominently, like an under jaw. 

 Trunk pear-shaped, considerably narrowed anteriorly, but not form- 

 ing a distinct neck; only a little longer than wide, with obscure seg- 

 mentation grooves on the ventral surface; strongly arched dorsally 

 and truncated posteriorly, but ventrally extending a little back of 

 the bases of the Qgg strings. 



The latter are cylindrical and as long as the entire body or longer; 

 eggs in 6 or 7 longitudinal rows, much twisted, about 30 eggs in 

 each row. 



First antennae of medium length and tipped with 2 or 3 minute 

 spines, but very obscurely segmented; second pair biramose, the 

 exopod one-jointed, longer than the endopod, enlarged a little at 

 the tip and armed with a few straggling spines; the endopod two- 



