946 THE VOYAGE OF H.M.S. CHALLENGER. 



1870. Dexamine, Boeck, Crust, amph. bor. et arct., p. 106. 



1876. „ Boeck, De Skand. og Arkt. Ainph., p. 311. 



1877. „ Stalio, Catal. Crost. dell' Adriatico, p. 181. 



1878. „ Spence Bate, The Crustacea in Couch's Cornish Fauna revised and added to, p. 50. 



1879. „ Thomson, Trans. New Zealand Inst., vol. xi. p. 237. 



1880. „ Nebeski, Beitrage zur Kenntniss der Amph. der Adria, p. 34. 



1884. „ Blanc, Die Amphipoden der Kieler Bucht, pp. 51, 64. 



1885. „ Cams, Prodromus Fauna? Mediterranean, pars ii. p. 404. 



1885. Amphitonotus (pars), Carus, Prodromus Faunae Mediterranean, pars ii. p. 407. 



1885. Dexamine, Haswell, Proc. Linn. Soc. N.S.W., vol. x. pt. i. p. 8 (sep. copy). 



1885. ,, Schneider, Pontocrates norvegicus, Boeck, and Dexamine thea, Boeck, p. 20. 



1886. „ Gerstaecker, Bronn's Klassen und Ordnungen, Bd. v. Abth. ii. p. 508. 



For the original definition of the genus, see Note on Leach, 1814 (p. 86). That this 

 genus appears first in the Appendix to Leach's article Crustaceology is clearly due to the 

 fact that the type species, Montagu's "Cancer Gammarus spinosas," 1813, was not 

 available when the article was originally written or printed, a fact which corroborates the 

 date 1813 for the article itself. Dana in 1852 (U.S. Explor. Exped., vol. xiii. pt. ii. p. 

 910, note) was inclined to include Dexamine in what he supposed to be Eathke's genus 

 Iphimedia. Sars in 1882 (Oversigt af Norges Crustaceer, p. 26) places Dexamine, in 

 the family Atylidse, between Lampra [Tritasta~], Boeck, and Atylus, Leach. Schneider 

 in 1885 inclines to uphold Boeck's "Dexamime" as a family, for the two genera which 

 Boeck assigns to the group. Boeck's definition of the genus is as follows : — 



" Maxillipeds having the inner margin of the outer plate armed with spines ; the 

 inner plate carrying on the apex a few slender setse. 



" Side-plates large, rounded on the lower margin ; the four front pairs much deeper 

 than the fifth. 



" Upper Antennas longer than the lower. 



" Perseopods all with the fourth and fifth joints elongate ; the finger long, slightly 

 curved." 



Dexamine jlindersi, n. sp. (PI. CXXXVII. C). 



Rostrum acute, small but clearly defined ; the lateral lobes of the head convex, 

 not projecting quite so far as the rostrum. 



Eyes situated on the lateral lobes, having numerous small ocelli. 



Upper Antennas. — The first joint rather thick, about once and a third as long as 

 broad, with a few spinules and cilia on the lower and apical margins ; the second joint 

 about once and a half as long as the first, with a slender spine high up on the under 

 margin, below which the joint becomes thinner and carries a few spinules ; the third 

 joint more than a third the length of the second, much thinner, a little longer than the 



