70 



CARL BOVALLIUS, AMPHIPODA HYPERIIDEA. I. 2. 



MIMONECTID^E. 



3. MIMONECTES STEENSTRUPI, C. BOVALLIUS, 1885. 



PI. VI, fig. 11—21. 



Diagn. Caput quintam partem diametri sphasrae altitudine sequans. Articulus primus flagelli anten- 

 narum primi paris pedunculo paullo longior, crassus, non serratus. Segmenta omnia 

 perm sphaeram formantia. Metacarpi pedum perm primi et secundi parium cylindrati, 

 spinis instructi; non hirsuti. Pedes tertii paris octavam partem diametri sphaerae longitudine 

 aequantes. Telson pedunculum pedum uri ultimi paris latitudine requans, dimidio longi- 

 tudinis pedunculi paullo brevius, latitudinem autern longitudine valde superans. 



The head is as high as a fifth of the diameter of the globe. The first joint of the flagellum 

 of the first pair of antenna' is only a little longer than the peduncle, thick, not serrated. 

 All the pergonal segments form the globe. The metacarpi of the first two pairs of perwo- 

 poda are cylindrical, armed with spines, not hirsute. The third pair equal an eighth of 

 the diameter of the globe. The telson is as broad as the peduncle of the last pair of 

 uropoda; it is a little shorter than half the length of the peduncle, but much longer than 

 its breadth. 



Colour. Whitish, pellucid. 



Length. 7 to 11 mm. 



Diameter of the globe. 6 to 10 mm. 



Hab. The Northern temperate and the Arctic regions of the Atlantic (D. M.). 

 of the Atlantic (P. M.; S. M.). 



Syn. 1885. Mimonectes Steenstrupi, C. BOVALLIUS. — 



The tropical region 



1887. 



1887. 



"Mimonectes, a remarkable genus 

 of Amphipoda Hyperidea», p. 

 12, pi. 2, fig. 13 and 14. 

 Nova Acta Soc. Keg. Scient. 

 Upsal. Ser. III. Vol. 13. 



"Systematical list of the Amphi- 

 poda Hyperiidea.» Bih. t. K. 

 Sv. Vet. Ak. Handl. Bd. 11. 

 N:o 16, p. 15. 



» Arctic and Antarctic Hyperids». 

 Vega-Exp. Vetensk. Iakttagel- 

 ser. Bd. 4, p. 558, pi. 47, 

 fig. 111—115. 



»Oversigt over det vestlige Gran- 

 lands Fauna af malakostrake 

 Havkrebsdyr», p. 56. Vidensk. 

 Meddel. fra den Naturhist. 

 Forening i Kj0benhavn, 1887. 



Mimonectes Steenstrupi has the peculiar balloon-like form of the perseon more 

 highly developed than both the other species. When floating it resembles more a bladder 

 than an amphipod and it is very difficult to recognize it among the other pelagic animals 



H. J. Hansen. 1887. 



