KONGL. SV. VET. AKADEMIENS HANBLINGAR. BAND. 21. N:0 5. 55 



Epimera magna. Segmentum secundum ac tertium uri libera, non coalita. Anguli postici 

 segmenti ultimi non producti. Pedunculi pedum uri primi et tertii parium ramis paullo 

 longiores, pedunculus pedum secundi paris raraos longitudine asquans. Telson maximum 

 triangulare, dimidio pedunculi ultimi paris pedum uri multo longius. 



The head is not rostrate, as long as the first two pereional segments. The eyes are middle- 

 sized. The flagellum of the first pair of antennae is anteriorly obtuse, as long as the head. 

 The pereiopoda are elongated, not hirsute. The femora of the first and second pairs are 

 broad, ovate; the carpi are longer than the metacarpi; the carpal process of the second 

 pair is as long as half the metacarpus. The tibiae of the third and fourth pairs are not 

 tumid; the dactyli are short. The fifth pair are a third longer than the third and fourth 

 pairs. The sixth pair are longer than the fifth, the femora are broad, ovate; the dactyli are 

 short. The dactylus of the seventh pair is much shorter than the metacarpus. The epime- 

 rals are very large. The second and third ural segments are free, not coalesced. The 

 posterior corners of the last segment are not produced. The peduncles of the first 

 and third pairs of nropoda are a little longer than the rami ; that of the second pair is 

 as long as the rami. The telson is very large, triangular, longer than half the peduncle 

 of the last pair of uropoda. 



Colour. Yellowish. 



Length. 10 — 20 mm. 



Hab. The North Atlantic, the tropical Atlantic. (D. M.; S. M.; U. M.) 



Syn. 1887. Vibilia robusta, C. BOVALLIUS. "Systematical list of the Amphipoda Hyperiidea». Bih. t. K. 



Sv. Vet. Ak. Handl. Bd. 11. N:o 16, p. 7. 



Vibilia robusta is one of the most common species and very difficult to distinguish 

 from its next allies, V. borealis and V. Kroeyeri. However, it is characterized by the un- 

 commonly large ovate femora of the two first pairs of pereiopoda and by the length of 

 the sixth pair. From Vibilia borealis it differs especially by the length of the seventh 

 pair of pereiopoda, and the shortness of the seventh pereional segment, from Vibilia Kroeyeri 

 by the comparatively larger eyes, the long acute rami of the uropoda, and the long second 

 ural segment. 



The integument of the body is very calcareous, hard and smooth; the hinder margins 

 of the segments are a little prominent. 



The head is quite as long as deep, the anterior margin obtuse, not rostrate. The lower 

 anterior corners project beneath the base of the second pair of antennae. 



The eyes are comparatively large, occupying more than two thirds of the height of 

 the head; they are broader above, bean-shaped. 



The first pair of antenna? (PL VII, fig. 13 — 15) are as long as the head and the first 

 pereional segment. The first joint of the peduncle is twice as long as the two following 

 joints. The flagellum is obtuse at the apex, the first joint is more than twice as long 

 as the peduncle, the two terminal joints are very minute. In a younger animal, a 

 male, (PI. VII, fig. 15) the first joint of the flagellum is a little more rounded anteriorly, 

 and the terminal joints are of a more considerable size. 



The second pair of antennae (PI. VII, fig. lb* and 17) are seven-jointed in the male, 

 and five-jointed in the female. In the male the third joint is the longest, in the female 

 the third and fourth are equal. 



