370 



CARL BOVALLIUS, AMPHIPODA HYPEHIIDEA. 



PHRONIMID^. 



2. PHRONIMA SPINOSA, C. BOVALLIUS, 1887. 



Pl. XVI, fig. 8—18. 



Diagn. Caput segmenta quinque prima persei longitudine fere jequans. Segmenta duo priora perad 

 segniento tertio haud altiora. Processus tibialis pedmn pierwi secundi paris dimidio stipite 

 carpi multo brevior. Pedes quinti paris pedes quarti paris longitudine aequantes; femur 

 curvatum; carpus longior quam latior; processus carpalis tuberculo marginis inferioris duplo 

 longior; tuberculus leviter incisus; metacarpus tuberculo lato instructus. Femur pedum 

 septimi paris angustum, femore pedum sexti paris duplo fere longius. Latera segmentorum 

 plei post acuta, non produeta. Ramus internus pedum uri secundi paris dimidio rami ex- 

 terni paullo longior. 



The head is nearly as long as the five first peraäonal segments together. The first two pe- 

 roional segments are hardly deeper than the third. The tibial process of the second pair 

 of permopoda is rauch shoi-ter than half the stem of the carpus. The fifth pair are about 

 as long as the fourth; the femur is S-curved; the carpus is ionger than broad; the carpal 

 process is twice as long as the tubercle on the under margin of the joint; the tubercle is 

 broad, and is slightly notched; the metacarpus is provided with a broad tubercle on the 

 front margin. The femur of the seventh pair is nearly twice as long as that of the sixth. 

 The lateral parts of the pleonal segments are sharp-pointed, but not produced. The inner 

 ramus of the second pair of uropoda is a little more than half as long as the outer. 



Colour. Hyaline. 



Length. 14—20 mm. 



Uab. The subtropical and tropical regions of the Atlantic; the Indian Ocean. (D. M.; 



S. M.) 



Syil. 1887. Phronima spinosa, C. BOVALLIUS. — »Systeraatical list of the Amphipoda 



Hyperiideau. Bih. t. K. Sv. Vet. 

 Ak. HandL Bd. 11, N:o 16, 

 p. 25. 



» » » Th. Stebbing. 1888. »Report on the Araphipodau. Voy. 



of H. M. S. Challenger. Zoology. 

 VoL 29, p. 1352. 



» » » O. Chun. 1889. »Das Männehen von Phronima se- 



dentaria nebst Bemerkungeii iiber 

 die Phronima-Arten». Zoologi- 

 scher Anzeiger. 12'"Jahrg. 1889, 

 p. 382. 



As I have saicl above Phronima spinosa is closelj' related to Ph. sedentaria, but 

 it is to be distinguished by the S-shaped femur in the fifth pair of perceopoda, and by 

 the inner ramus of the second pair of uropoda being shorter than the outer. As there 

 are only slight variations in the other organs from those in Ph. sedentaria, I shall restrict 

 inyself to some few remarks only. 



