382 CARL BOVALLIUS, AMPHIPODA HYPERIIDEA. I. 2. PHRONIMID^.. 



Phronima Collelti. 



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

 scareely longer tliaii the seeoiid; the seventh is quite as long as the two preceding 

 together. 



The Jirst tivo pairs of perceopoda (Pl. XVI, tig. 39 aud 40) are exactly like those 

 pairs in the female. 



The tinrd and fourtli pairs are eomparatively a, little shorter than in the female, 

 being a trifle shoi'ter than the head and perajon together; but otherwise they agree with 

 those in the female. 



The fifth pair (Pl. XVI, tig. 41) are like that pair in the female, biit the meta- 

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



The sixtii avd seventh. pairs (Pl. XVI, fig. 42) agree with those in the female, but 

 the fe ni ur in the seventh pair is a little longer tha,n that in the sixth. 



The pleon is fully as long as the last fivc perasonal segments together; the first 

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

 pleonal segments are broadly rounded. 



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



The tiriis and its appcndages (Pl. XVI, tig. 43) are like those in the female. 



6. PHRONIMA PÅCIFICA, TH. STREETS, 1877. 



Pl. XVI, fig. 48—50. 



Diagll. Caput segmeutis tribus priiuis persei brevius. Seginenta duo priora pejvri segmento tertio non 

 altiora. Processus tibialis peduni perwi secundi paris diniidio stipitis carpi multo brevior. 

 Pedes quinti paris pedes quarti paris longitudine aaquantes; carpus latitudine loiigitudinem 

 a3quans; processus carpalis tuberculo marginis inferioris haud longior; tuberculus latus, 

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

 sexti paris paullo lougius. Latera segraentorum pZei post rotundata. Eamus internus j^^edMm 

 uri secundi paris dimidium rami externi longitudine sequans. 



The head is sliorter than the first three perfeonal segments together. The first iwo perwonal 

 segments are not dceper than the third. The tibial process of the second pair of perao- 

 poda is much shorter than half the stem of the carpus. The fifth pair are as long as the 

 fourtii; 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. 



Lengtli. 7 10 mm. 



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



