KONGL. SV. VET. AKADEMIBNS IIANDL1NGAR. BAND. 22. N:0 7. 373 



In 1888 Stebbing proposed the new specific name Phronima megalodus, a careful 

 comparison of his description and drawings with those specimens at my disposal, which I 

 previously had identified with Guerin Meneville's Ph. solitaria, convinced me that they 

 were the same species or variety, and thus I have retained the older name. I refer the 

 reader to Stebbing 's description, giving here only a few particulars. 



The female. 



PI. XVI, tig. 4—7. 



The first four pairs of perceopoda (PI. XVI, fig. 5) are almost in every respect like 

 those pairs in Phronima sedentaria, except that the tibial process in the first and second 

 pairs is much shorter. 



The fifth pa,ir (PI. XVI, fig. 6). The femur, genu, and tibia are like those in 

 Ph. sedentaria. The stem of the carpus is a third part longer than broad; the tubercle 

 on the under margin is very high, crenulated on the hind margin; the carpal process 

 does not equal a third part of the length of the stem of the carpus, and is scarcely more 

 than a third part longer than the tubercle on the under margin of the joint. The meta- 

 carpus is much shorter than the stem of the carpus, with a feeble intumescence at the 

 middle of the front margin. 



The sixth and seventh pairs are like those in Ph. sedentaria, but the femur of the 

 seventh pair is shorter, being only a little longer than the femur of the sixth pair, and 

 considerably shorter than that of the fifth. 



The lower hind corners of the pleonal segments are sharp-pointed, but not produced. 



The uropoda (PI. XVI, fig. 7) are comparatively shorter than those in Ph. seden- 

 taria. The second pair reach fully to the apex of the peduncle of the third pair; the 

 inner ramus is a little shorter than the outer. The peduncle of the third pair is only a 

 fourth part longer than the inner ramus. 



The telson is more than half as broad as the last coalesced ural segment. 



