20 Carl Bovallius, 



5. Syuopia augustifroiis. DANA, 1852. 



(PI. II, tig. 36—39, copied from Dana). 



Syn. 1852. 'Si/nopia anguslifrons. DANA. United States Exploring Expedi- 



tion. Crustacea, vol. 2, p. 998, 

 pi. 68, tig. 8 a— d. Fol. 

 1862. ,, ,, ,, Spence Bate. Catalogue of the specimens of 



Amphipodous Crustacea in of the 

 collection of the British Museum, 

 p. 342, pi. 54, fig. 2. 



Diagn. Caput angustum, triangulare, longius quaiii latius. 

 Ociili suppleraentarii desimt. 

 Avtenvce prinii pan's quam })ereion multo breviores; flagellum .secundarium 



longitudiuc articulum prininiu flagelli (veri) superaus. 

 Segmentiim primiim pereii secundo breviu.s, segmentum sextiim et septimum 



sequalia. 

 Femora paris ([uinti pedum pe^^eii angiista, rectangiilaria, femora pari.s sexti 



duplo latiora, infra truncata; pedes septimi pari.s ])edil)us sexti breviores. 

 Pedunculi poda))i plei infra lati, truncati. 

 Segmentum prinuun )iri seeundo paulo longius. 



The head is narrow, triangular, longer than broad. 



Secondary eyes are wanting. 



l^ha first pair of antennce are much shorter than the pereion; the 

 secondary flagellum is longer than the first joint of the true flagellum. 



The first pereional segment is shorter than the second ; the sixth 

 is as long as the seventh. 



The femora of the fifth pair of pereiopoda are narrow, rectangu- 

 hir, those of the sixth pair twice as broad, truncated below; the seventh 

 ])air are shorter than the sixth. 



The peduncles of the pleopoda are broad at the lower ends, truncate. 



The first ural segment is only a little longer than the second. 



The sides of the head ))converging forward at an angle of 40" — 50"». 



»The number of ocelli is between 40 and 50.)) 



The first pair of antennce [PI. II, fig. 38] reach to the antei-ior 

 margin of the fifth pereional segment, the true ))flagellum is five-jointed)), 

 the secondary flagellum ))three-jointed)). 



The second pair of antennce reach beyond the anterior margin of 

 the last pleonal segment. ))The flagellum is ten-jointed, joints slender, 

 cylindrical)). 



