KONGL. SV. VET. AKADEMIENS HANDLINGAR. BAND. 22. N:0 7. 33 



4. PARAPHRONIMA CLYPEATA, C. BOVALLIUS, 1885. 



PI. II, fig. 16—40. 



Diagn. Caput altius quam longius, non duplo altius segmento primo perasi, nee segmenta quattuor 

 prima peraai longitudine a3quans. Pedes per mi curti, robusti, femoribus dilatatis. Femur 

 pedum primi paris articulis sequentibus conjunctis baud longius. Metacarpus pedum tertii 

 ac quarti parium metacarpo pedum quinti ac sexti parium longior. Pedes quinti paris, 

 quam peraeon breviores. Pedes septiini paris pedibus sexti paris paullo breviores. Latitudo 

 pedunculi pedum uri ultimi paris longitudinem ramorum aequans vel superans. Telson 

 parvum, obtuse triangulare. 



The head, is deeper than long, not twice as deep as the first pergonal segment, nor as long 

 as the first four pergonal segments together. The peraiopoda are short, robust, with dilated 

 femora. The femur of the first pair is scarcely longer than all the following joints to- 

 gether. The metacarpus of the third and fourth pairs is longer than that of the fifth and 

 sixth. The fifth pair are shorter, than the person. The seventh pair are a little shorter 

 than the sixth. The, breadth of the peduncle of the last pair of uropoda equals or is 

 greater than the length of the rami. The telson is small, obtusely triangular. 



Colour. Light yellow to brown. 



Length, c? 6 — 14 mm., $ 6—15 mm. 



Hab. The northern temperate region of the Atlantic (D. M.; F. M.; K. M.; P. M.; S.M.: U. M.); 



the tropical region of the Pacific (S. M.). 



Syil. 1885. Paraphronima clypeata, 0. BOVALLIUS. »On some forgotten genera among the Amphi- 



podous Crustacea.* Bih. t. K. Sv. Vet. Ak. 

 Handl. Bd. 10. N:o 14, p. 11, fig. 3. 

 » » » 1887. "Systematical list of the Amphipoda Hyperiidea.w 



Bih. t. K. Sv. Vet. Ak. Handl. Bd. 11. N:o 

 16, p. 13. 

 1887. » pectinata » 1. c. p. 13. 



Paraphronima clypeata, it may be considered a species or a variety, has some 

 characteristics in common with P. gracilis and others with P. crassijjes. The large head 

 and the pectinate ramus of the first pair of uropoda in the male point to the former, the 

 robust legs and the length of the seventh pair of peraiopoda to the latter. 



The integument of the body is thick and hard; the bod)' is more compressed than 

 in the other species. 



The head is rounded as in Paraphronima erossipes but the under margin is nearly 

 straight; it is about the half deeper than the first pergonal segment, and almost as long 

 as deep. It is scarcely longer than the first three pergonal segments together. 



The eyes are similar to those of P. crass/.pes. but there is some appearance of a 

 division into a median and a lower portion. 



K. Sv. Vet. Ak. Handl. Baod. 22. N:o 7. 5 



