KONGL. SV. VET. AKADEMIENS HANDLINGAK. BAND. 22. N:0 7. 25 



the Rev. Mr Stebbing most kindly sent me his magnificent work on the Challenger Amphi- 

 poda. Among the Hyperids quoted there he gives an elaborate description of Para- 

 phronima cuivis n. sp. which, however, according to my opinion is a true P. gracilis. He 

 himself mentions that the very short descriptions of the previously known species made it 

 impossible to identify the Challenger specimens with any one of the old species. He suggests 

 also »that a single name may suffice for them all». Really, I am very inclined to think that 

 the species of Paraphronima could be just as well called varieties as species. But as I 

 do not find it more convenient for the carcinological study to establish varieties without to 

 know the connecting links, and as the four species P. pedestris, P. gracilis, P. crassipes 

 and P. clypeata differ by constant, if truly small, characteristics T quote them here as species. 



A. The peduncles of the first two pairs of uropoda are more than twice as long as 



the inner rami I. P. pedestris. 



B. The peduncles of the first two pairs of uropoda are only a little longer than 



the inner rami. 

 b 1. The seventh pair of perreopoda are not longer than the first four joints 



of the sixth pair 2. P. gracilis. 



I) 2. The seventh pair of perreopoda are nearly as long as the sixth pair. 



bb 1. The rami of the last pair of uropoda are much longer than the 



breadth of the peduncle 3. P. crassipes. 



bb 2. The rami of the last pair of uropoda are not longer than the breadth 



of the peduncle 4. P. clypeata. 





1. PARAPHRONIMA PEDESTRIS, F. E. GUERIN-MENEVILLE, 1836. 



Paraphronima pedesiris, Guerin-Meneville. 

 Facsimile from Gukbin-Meneville, Tcognographie du Regne Animal, pi. 25, fig. G. 



Diagll. Caput multo altius quam longius, non duplo altius quam segmentum primum perrei, segmentis 

 tribus primis percei conjunctis brevius. Pedes perwi elongati, graciles, femoribus angustis, 

 carpis valde elongatis. Femur pedum primi paris articulis sequentibus conjunctis longius. 

 Metacarpus pedum tertii ac quarti parium metacarpo pedum quinti ac sexti parium longior. 

 Pedes quinti paris quam person multo longiores. Pedes sexti paris pedibus quinti paris 

 breviores. Pedes septimi pans pedibus sexti paris multo breviores. Pedunculi pedum mi 

 elongati, ramis multo longiores; rami acuti. 



The head is much deeper than long, not twice as deep as the first pergonal segment, and 

 shorter than the first three pergonal segments together. The perceopoda are elongate, 



4 



K. Sv. Vet. Akad. Handl. Band. 22. N:o 7. * 



