B. 



KONGL. SV. VET. AKADEMIENS HANDLINGAR. BAND. 22. N:(; 7. iiliå 



The two species are easily distinguishcd from one another: 



Tlic Iiead is fully as long as the first three pei-a3onal segments togethcr. Tlie 

 fifth pair of periBopoda are scarcely longer thau the fourth; the femur is not 

 longer than the carpus. The rami of the uropoda are narrowly ovate I. \), califoriiira. 



The head is much shorter than the first three pera^onal segments together. The 

 fifth pair of perajopoda are considerably longer than the fourth; the femur is 

 longer than the carpus. The i-ami of the last pair of uropoda are broadly ovate 3. D. latissiiiia. 



1. DAIRELLA CALIFORNICA, C. BOVALLIUS, 1885. 



Pl. XV, fig. 21—33. 



Diagu. Caput segmenta tria prima peraei longitudine sequans. Segmenta duo priora 'perwi coalita, 

 cetera libera. Pedes perwi quinti paris pedibus quarti paris haud longiores, ac quam pera3on 

 multo breviores; femur carpo multo longius. Femur pedum parium trium ultimorum an- 

 gustum, plus quam quinquies longius quam latius. Pedes uri primi paris apicem pedum 

 ultimi paris superantes; rami pedum ultimi paris anguste ovati. 



The head is as long as the first three personal segments together. The first two perceonal 

 segments are coalesced, the following are free. The fifth pair of perceopoda are not longer 

 than the fourth, and are shorter than tlie perason; the femur is much longer than the 

 carpus. The femur of the last three pairs is narrow, more than five times as long as 

 broad. The first pair of uropoda reach beyond the apex of the last pair; the rami of the 

 last pair are narrowly ovate. 



Coloxir. Whitish red, with numerous spöts of dark red. 



Lengtli. 9 mm. 



Hab. The Northern temperate and tropical regions of the Pacific, ofl' the West coast of 

 California. (S. M.). 



Syn. 1885. Paraphronima californica, C. BOVALLIUS. 



Dairella 



— »On sorae forgotteii genera amoug 



the Amphipodous Crustacea». Bih. 

 t. K. Vet. Ak. Handl. Bd. 10. 

 N:o 14, p. 11. 



— 1887. »Systematical list of the Amphipoda 



Hyperiidea». Bih. t. K. Sv. Vet. 

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

 p. 24. 



Dairella californica is at once distinguished from D. latissima by the large, in- 

 flated head, the shortiiess of the fifth pair of perteopoda, and by the narrow femur in the 

 last three pairs. 



Hitherto I know only the female form. 



