382 



CARL BOVALLIUS, AMPHIPODA HYPERIIDEA. I. 2. 



PHRONIMID.E. 



Phronima Colleiti. 



The pevceon is comparatively shorter than in the female. The third segment is 

 scarcely longer than the second; the seventh is quite as long as the two preceding 

 together. 



The first two pairs of perceopoda (PL XVI, fig. 39 and 40) are exactly like those 

 pairs in the female. 



The third and fourth pairs are comparatively a little shorter than in the female, 

 being a trifle shorter than the head and peraeon together; but otherwise they agree with 

 those in the female. 



The fifth pair (PI. XVI, fig. 41) are like that pair in the female, but the meta- 

 carpus is a trifle longer, being almost as long as the stem of the carpus. 



The sixth and seventh pairs (PI. XVI, fig. 42) agree with those in the female, but 

 the femur in the seventh pair is a little longer than that in the sixth. 



The pleon is fully as long as the last five pergonal segments together; the first 

 pleonal segment is quite as long as the last pergonal. The lower hind corners of the 

 pleonal segments are broadly rounded. 



The pleopoda have the peduncle thicker, and more globular, than in the female. 



The urus and its appendages (PI. XVI, fig. 43) are like those in the female. 



6. PHRONIMA PACIFICA, TH. STREETS, 1877. 



PL XVI, fig. 48—50. 



Diagll. Caput segmentis tribus primis perrei brevius. Segmenta duo priora percei segmento tertio Bon 

 altiora. Processus tibialis pedum percei secundi paris dimidio stipitis carpi multo brevior. 

 Pedes quinti paris pedes quarti paris longitudine rcquantes; carpus latitudine longitudinem 

 aequans; processus carpalis tuberculo marginis inferioris haud longior; tuberculus latus, 

 multi-dentatus; metacarpus tuberculo carens. Femur pedum septimi paris femora pedum 

 sexti paris paullo longius. Latera segmentorum plei post rotundata. Ramus internus perfttm 

 uri secundi paris dimidium rami extend longitudine aequans. 



The Head is shorter than the first three personal segments together. The h'rst two pergonal 

 segments are not deeper than the third. The tibial process of the second pair of perceo- 

 poda is much shorter than half the stem of the carpus. The fifth \>a.\v are as long as the 

 fourth; the carpus is as broad as long; the carpal process is not longer than the tubercle 

 on the under margin of the joint; the tubercle is broad, and multi-dentate: the meta- 

 carpus wants a tubercle. The femur of the seventh pair is a little longer than that of the 

 sixth. The lateral parts of the pleonal segments are rounded behind. The inner ramus 

 of the second pair of uropoda is half as long as the outer. 



Colour. Hyaline. 



Length. 7 10 mm. 



Hal). The tropical and subtropical regions of the Pacific and of the Atlantic. (S. M.) 



