194 Bulletin, Vanderhilt Marine Museum, Vol. Ill 



lightly channelled, the apex very acute. There are a pair of articu- 

 lated, subdistal, slender, acute spines, about one-third as long as the 

 telson and placed one on each side of it. 



The eye is large, very short-stalked, nearly spherical, the distal half 

 being slightly the larger and occupied by the cornea. 



The antennulae have the basal segment elongate, dorsally flattened 

 and slightly concave, with the outer lateral margin fringed with a row 

 of stiff setae, and with a large, leaf -like process at the distal margin ; 

 the second article is about half as long as the first and the third article 

 is two-thirds as long as the second ; both are rather stocky ; the flagella 

 are nearly equal in length, each being nearly half as long as the body. 

 The antennae have the basal article short, the scaphocerite as long 

 as the antennular peduncle and with its outer lateral margin straight 

 and terminating in a minute tooth distally ; the inner lateral margin 

 convex, the blade narrowed distally and rounded, margin ciliated; 

 the dorsal surface bears a distinct longitudinal keel. The second and 

 third articles lie beneath the scaphocerite and reach almost to its distal 

 margin, being nearly subequal in length; this flagellum is about 

 twenty-five percentum longer than the antennular flagellum. 



The series of legs are in ratio to each other as illustrated in the 

 plate 74. 



The gills are very acurately drawn. 

 Synonymy. — Thysanopoda norvegica M. Sars, Nyt. Mag. Naturvid., 

 Bd. XV. 1868.— Verbill, Kept. U. S. Comm. Fisheries for 1883, 

 p. 523, 1885. 

 Nyctiphanes norvegica G. 0. Sars, Kept. Voy. '^ Challenger," Zool., 



Schizopoda, vol. 13, p. 115, 1885. 

 Meganyctiphanes norvegica Holt and Tattersall, Kept. Sea and In- 

 land Fisheries of Ireland, 1902-03, pt. 2, No. 4, p. 105, p. 135, pi. 

 16. — Hansen Danish Ingolf Exped., Crust. Vol. 3, pt. 2, p. 85, 

 1908. 



Family: EUCOPIDAE G. 0. Sars. 



Genus: EUCOPIA Dana. 

 Eucopia unguiculata Willemoes-Suliin. 



Plate 73. 



Type : Collected by the '' Challenger" in the Atlantic Ocean and de- 

 posited in the British Museum. 



Distribution : Taken from the surface down to 1000 meters in the 

 North Atlantic, also known from the Mediterranean Sea ; found in the 

 Indo-Pacific deep-sea fauna by the "Sihoga" Expedition. 



