450 



articulations, very sharply defined, so as to cause the posterior edge of the 

 flagellum to be conspicuously serrated. Inferior antennse scarcely longer than 

 the superior, and having the flagellum about the length of the peduncle, and 

 likewise exhibiting a prominently serrated aspect of the hind margin. Gna- 

 thopoda very strongly built, carpal lobe well-developed and densely setous, 

 propodos much inflated at the base, nearly obpyriform in shape, and not having 

 the palm distinctly defined, dactylus strong and curved. Pereiopoda much 

 more strongly built than in the preceding species, and having the meral 

 joint especially in the 3 posterior pairs, considerably expanded and produced 

 at the end, basal joint about of same form as in C. Bathkei, that of last 

 pair being rather large, especially in the male. Last pair of uropoda com- 

 paratively larger than in the preceding species, both rami being edged with 

 ciliated setae in addition to the usual denticles. Telson oblong linguiform, 

 somewhat dilated at the base, and having the outer part evenly rounded 

 off. Colour uniformly light olive-green, with a somewhat irregular whitish 

 area occupying the anterior part of the back. Length of adult female 

 reaching 12 mm., that of male 13 14 mm. 



Remarks. This is the species originally described by Kroyer and 

 that upon which the genus Calliope of Sp. Bate was founded. It is very 

 nearly allied to C. Bathkei, from which, however, on a closer examination, it 

 may be distinguished, not only by its much larger size and different colour, 

 but also by the comparatively larger and broader coxal plates, the somewhat 

 differently shaped last pair of epimeral plates of metasome, the much more 

 fully developed terminal lappet of the last peduncular joint of the superior 

 antennae, and finally, by the comparatively more strongly built gnathopoda 

 and pereiopoda. The form recorded by my late father as Ampliiflioe serrati- 

 <ont.lv, is undoubtedly identical with the present species. Some specimens of 

 a Calliopius kindly sent to me from Dr. Hansen, and collected in the northern 

 part of the Pacific in lat. 45 N., long 139 E., I am unable to distinguish from 

 this species, which thus would seem to have a most extensive distribution. 



Occurrence. Off the whole coast of Finmark this species is rather 



abundantly found in comparatively shallow water, from 3 to 30 fathoms, 

 among algee. It also occurs occasionally off the west coast of Norway, as far 

 south as Karme. 



Distribution. Greenland (Kroyer), Spitsbergen (Goes), Labrador 



(Packard), British Isles (Sp. Bate); northern part of Pacific (Copenhagen 

 Museum). 



