Decapod Crustacea of Bermuda, Part II. 51 



great depths, they certainly do not always come from the bottom. 

 Some species have been taken in the Gulf-weed (Sargassum) in 

 the North Atlantic. 



Bate, in the Voyage of the Challenger, vol. xxiv, pp. 389-418, 

 described the following species from the central or western parts 

 of the North Atlantic. 



Sergcstcs atlanticns M.-Edw.* Many localities in the North Atlantic; 

 \\est Indies to Greenland. S. Africa; Japan; Fiji Is.; S. of 

 Australia. 



5". edwardsii Kroyer, off Cape Verde Is. to Greenland and Pacific Ocean. 



S. oculatus Kroyer, Mid-Atlantic to Greenland; North and S. Pacific. 



5". ovatoculatus Bate, North Atlantic. 



S. parridcns Bate, Tropical Atlantic; Pacific Ocean; off Australia. 



S. longirostris Bate, Mid-Atlantic. 



S. longispinus Bate, Mid-Atlantic; North Atlantic. 



S. pcncrinkii Bate, North Atlantic. 



Other North Atlantic species have been recorded by various authors. 

 Several of these species are liable to occur in Bermuda waters. 



Family LEUCIFERID^ Dana. 

 Leucifcrina (subfamily) Bate, op. cit., p. 443, 1888. 



Body slender and much elongated. Antennal and ocular seg- 

 ments (cephalon or "neck") greatly prolonged so that the antennae 

 and eyes are inserted relatively far forward of the oral appendages 

 and mouth. Eyes on long stalks. Third maxillipeds leg-like. 

 The abdominal (pleon) segments are especially much elongated, 

 forming more than half the body. Thorax short. No exopods 

 on legs. First two pairs of legs are slender, not chelate; rudi- 

 mentary chelae on the third pair; fourth and fifth pairs lacking. 

 No branchiae on the thoracic segments. Pleopods of second to 

 fifth pairs have two large ciliated branches; a small third branch, 

 also, on second pair of male, and clasping organ on first pair. 



The eggs are carried beneath the thorax of the female, without 

 special organs for attachment. Young hatch in a nauplius form 



* This is the Sergcstcs arcticus of Kroyer, 1855. See also S. arcticus 

 S. I. Smith, Dec. Crust. Albatross Dredgings of 1884, pp. 6, 93, pi. xx, 

 figs. I, 2, 1886. C. Hatteras, northward, 235 to 2516 fathoms (?). It has, 

 however, been repeatedly taken at the surface. 



