646 



Uemarhs. — The Rev. Mr. Stebbing has called attention to the fact, 

 that the type of this genus has already been described by Slabber in the 

 year 1749 as PJdisica marina, and, according to the laws of priority, the 

 generally used generic name J^rolo, which was proposed by Leach in 1S14, 

 must therefore cede to the much older generic name Phtisica, of Slabber. Two 

 other generic names have been proposed by Latreille, viz., Leptomcra and 

 Nauprcdia, both being merely synonyms. From all the other Caprellidoiy this 

 geniis is easily distinguished by having all the pereiopoda distinctly deve- 

 loped. Several species of this genus have been described, Init some of them 

 are very unsatisfactorily characterized, and P. Mayer only admits 4 species. 

 To the fauna of Norway belongs but a single species, to be described below. 



1. Phtisica marina, Slabber. f7^'i 



(PI. 223). 



Phtisica niarinn, Slabber, Natmirk. Verhist, p. 79. 



Syn.: S(|nilla ventricosa, MiUIer 9- 



» Gamituinis peilatiis, Abildg. 



» Proto pedata- Ijeach. 



» Jjeptomera poilata, Latr. 



» Leptoniera ventricosa, Desra. 



> Nauprcdia tristi.s, v. Bened. 

 » Proto Goodeiri, 8p. Bate. 



> — ventrioosa, Boeck. 



Body extremely slender and perfectly smootli, witli tlie 4 anterior 

 free body-segments somewhat fusiform in shape; antepenultimate segment 

 fully as long as the preceding one; last segment very short. Cephalosome 

 (cephalon -|- 1st segment of mesosome) much shorter than the succeeding seg- 

 ment and nearly club-shaped, being obtusely rounded in front. Eyes of 

 moderate size, orbicular, with dark red pigment and well-developed visual 

 elements. Superior antennae exceeding half the length of the body, 2nd joint 

 of the peduncle the longest. ?.rd joint longer than the 1st, flagellum not quite 

 as long as tlie peduncle, and composed of about 14 articulations. Inferior 

 antennae scarcely half the length of the superioi, and much narrower, with 

 only scattered bristles posteriorly, the last 2 joints of the peduncle nearly 

 equal-sized, flagellum about the length of the last peduncular joint, and com- 

 posed of 5 articulations. Anterior gnathopoda with the carpus comparatively 

 narrow and but slightly widening distally, propodos about twice its length 

 and rather expanded, subtriangular in form, palm very oblique, and defined 



