KONGL. SV. VET. AKADEMIENS HANDLINGAR. BAND. 22. N:0 7. 59 



The seventh family MIMONECTIDJE, C. BOVALLIUS, 1885. 



Diagn. Perceon simul cum capite inflatum, sphasram maximam formans. Ocelli, non conjuncti, in 

 lateribus capitis dispersi. Antenna primi paris rectae, flagello elongato instructa3, articulus 

 primus flagelli longus, vix tumidus, articuli sequentes parvi, perpauci, terminates. Antenna' 

 secundi paris parvas, articulis perpaucis, parti inferiori capitis affixa?. Instrumenta oris ma- 

 sticatoria, mandibular palpo carentes. Pedes percni parium quinque ultimorum ambulatorii; 

 pedes septimi paris non transformati. 



The perceon together with the head is inflated, forming a very large globe. The ocelli are 

 not united, but dispersed on each side of the head. The first pair of antennce are straight, 

 provided with an elongate flagellum, the first joint of the flagellum is long, scarcely tumid, 

 the following joints are small, few in number, terminal. The second pair of antenna? are 

 small, few-jointed, fixed at the under side of the head. The mouth-organs are adapted 

 for mastication, the mandibles without palp. The last five pairs of peraeopoda are walk- 

 ing legs, the seventh pair are not transformed. 



Syil. 1885. Mimonectida>, C. BOVALLIUS. »Mimonectes, a remarkable genus of Amphipoda Hype- 



ridea», p. 2. Nova Acta Soc. Reg. Scient. Upsal. 

 Ser. III. Vol. 13. 



» » 1887 . "Systematical list of the Amphipoda Hyperiidea». Bih. t. 



K. Sv. Vet. Ak. Handl. Bd. 11. N:o 16, p. 15. 



» » 1887. »Arctic and Antarctic Hyperidsw. Vega-Exp. Vetensk. 



Iakttagelser. Bd. 4, p. 558. 



Since I first established this family no further additions to our knowledge of the 

 peculiar animals constituting it have been made, but a re-examination of my scanty ma- 

 terial allows me to give some more details, overlooked at the first occasion, and to make 

 some corrections especially in the drawings. Still I believe that the strange and remark- 

 able shape acquired by the Mimonectidae must be looked upon as an instance of mimicry 

 serving them as a protection against voracious foes. 



Genus 1. MIMOIVECTES, C. BOVALLIUS, 1885. 



Diagn. Caput magnum, partem sphaera? formans. Pedes perm primi et secundi parium simplices non 

 cheliformes. Pleon compressum, non inflatum. Pedes uri ramis binis liberis instructi. 



The head is large, forming a part of the wall of the globe. The first and second pairs of 

 peraeopoda are simple, not cheliform. The pleon is narrow, not inflated. The uropoda 

 are provided each with two free rami. 



