KONGL. SV. VET. AKADEMIENS HANDLINGAR. BAND. 22. N:0 7. 379 



A comparison of the descriptions and drawings given by Giles and Chl'n with the 

 following description will prove that the new specific names Phronima bucephala and Ph. 

 Diogenes are only synonyms for Ph. Colletti, which was proposed by me in 1887. 



Phronima Colletti is most closely allied to Ph. pacifiea, Streets, but is easily 

 distinguished by the length of the third and fourth pairs of peraeopoda, and by the inner 

 ramus of the second pair of uropoda being longer than the outer. 



The female. 



PI. XVI, fig. 44—47. 



The body is comparatively more robust than in Phronima sedentaria; the head and 

 peraeon together are much longer than the pleon and urus together. 



The head, is tolerably long, not fully twice as deep as long. The front side is 

 feebly convex, without antennal groove. 



The eyes are closely like those in the preceding species. 



The first pair of antenna; (PI. XVI, fig. 45) are fixed below the middle of the front 

 side of the head. The single peduncular joint is a little longer than broad. The single 

 flagellar joint is almost cylindrical, rounded at the apex, and provided with long olfactory 

 hairs; it is more than twice as long as the peduncle. 



The mouth-organs are exactly like those in the male. 



The perteon. The first two segments are abruptly much deeper than the third. 

 The third segment is much shorter than the two preceding together. The seventh segment 

 is thicker than in the preceding species, and is somewhat longer than the fifth and sixth 

 together. 



The first pair of peraeopoda reach far beyond the lower end of the head. The 

 femur is a little longer than the three following joints together. The tibia is only a 

 little produced at the lower hind corner. The carpal process is not half as long as the 

 metacarpus. The metacarpus is longer than the stem of the carpus; is tolerably thick 

 at the base, and tapers gently towards the apex. The dactyloptera are elongated, 

 somewhat more than half as long as the dactylus, and are finely pectinated along the 

 hind margin. The dactylus is long, almost a third part as long as the metacarpus. 



The second pair (PI. XVI, fig. 46) reach a little beyond the apex of the tibia in 

 the third pair. The femur is a little dilated, with the hind margin convex; it is longer 

 than the three following joints together. The tibial process reaches hardly to a fourth 

 part of the carpus. The carpal process is about a fourth part as long as the metacarpus. 

 The metacarpus is somewhat longer than the stem of the carpus. The dactylus is 

 long, nearly a fourth part as long as the metacarpus. 



The third and fourth pairs are longer than the head and the whole peraeon. The 

 femur is much shorter than the three following joints together. The genu is longer 

 than broad. The tibia is almost twice as long as the genu. The carpus is longer than 

 the tibia, but shorter than the tibia and genu together. The metacarpus is as long 

 as the carpus. The dactylus is minute. 



