655 



5. Pariambus typicus, (Kreyer). 



(PI. 235, fig. 2). 



Podalirius tyiricus, Kr0yer, Nat. Tidsskr. 2 ser. Vol. 1, p. 283. 

 Syn.: Caprella typica, Sp. Bate. 



Body perfectly smooth, and rather stout in female, somewhat more 

 slender in male. Cephalosome about the length of the succeeding segment, 

 and obtusely rounded in front; penultimate segment twice as large as the 

 last one. Eyes small, rounded, pigment dark red. Superior antennae in 

 female rather short, about equalling l /s of the length of the body, 2nd joint 

 of the peduncle the longest, 3rd joint about the length of the 1st, nagellum 

 half the length of the peduncle, and composed of 4 articulations only; those 

 in male considerably more elongated, with the 1st joint of the peduncle 

 equalling in length the 2nd, and the flagellnm 6-articulate. Inferior antennae 

 in female but little shorter than the superior, and but sparingly setous. 

 Anterior gnathopoda with the carpus comparatively short and expanded be- 

 low to a setiferous lobe, propodos of the usual oval triangular shape. Post- 

 erior gnathopoda in female with the meral joint obtusely produced in front, 

 propodos large and of a regular oval form, with the upper edge evenly 

 curved, the lower forming at the base a distinct triangular projection denning 

 the palm, which is evenly arcuate, without any projections, dactylus strong, 

 falciform; those in male comparatively larger than in female, with the pro- 

 podos more elongated, and having the palm deeply insinuated in the middle, 

 the sinus being denned behind by a linguiform projecting lobe. Branchial 

 lamella very small. Antepenultimate pair of pereiopoda extremely minute, 

 with the terminal joint about twice the length of the basal one, and carrying 

 a number of small bristles. The last 2 pairs of pereiopoda rather slender, 

 with the carpal joint longer than the meral one, propodal joint fully as long 

 as those joints combined, and linear in form, with a very slight prominence 

 at the base tipped by a spine, dactylus falciform. Body of a yellowish grey 

 hue, sometimes slightly variegated with a light brown pigmen. Length of 

 adult female 6 mm., of male 7 mm. 



Bemarlcs. - - This form was first described by Kroyer as the type of 

 his genus Podalirius, and has subsequently been recorded by several other 

 authors. From the 2 Mediterranean species described by P. Mayer, it is 

 chiefly distinguished by the rather different shape of the propodos of the 

 posterior gnathopoda in the male. 



Occurrence. - The species occurs rather abundantly along the whole of 

 the south and west coasts of Norway, as also in the Trondhjemsfjord, in depths 



