REPORT ON THE AMPHIPODA. 1197 



the}' have a spinulc on the inner side of the distal end. In the figure ur.2., the line is 

 incomplete which should have separated the inner ramus from the peduncle. 



The Telson seems to be rather longer than broad, much rounded distally, with two 

 spines on the surface at about the centre ; whether these are planted on a raised process 

 as in the companion species, I could not definitely ascertain. 



Length. — The specimen measured, in a straight line from the front of the head to the 

 back of the second pleon-segment, one-fifth of an inch. 



Locality. — The single incomplete specimen, a female, was labelled as obtained at Port 

 Jackson, 2 to 10 fathoms. 



Remarks. — The specific name refers to the small size of the creature, and its want of 

 conspicuous armature. 



It is separated by the structure of the gnathopods from the species which Mr. Haswell 

 has named Dexiocerella lobata and Dexiocerella Isevis. These are only j>artially figured 

 in Mr. Haswell's paper, and I have not seen specimens. 



Genus Lsetmatophilus, Bruzelius, 1859. 



1859. Lsetmatophilus, Bruzelius, Skand. Amph. Gamm., p. 10. 



1862. Cyrtophium (pars), Spence Bate, Brit. Mus. Catal. Amph. Crust., p. 273. 



1869. ,, Norman, Last Report on Dredging among the Shetland Isles, p. 285. 



1870. Lsetmatophilus, Boeek, Crust, amph. bor. et arct., p. 185 (265). 



1876. „ Boeck, De Skand. og Arkt. Amph., p. 662. 



1877. ,, Metzger, Crust. Isop. Amphip. et Decap. Danias, p. 166. 

 1882. ,, Sars, Oversigt af Norges Crustaceer, p. 32. 



1885. Lsematophilus, Haswell, Proc. Linn. Soc. N.S.W., vol. x. pt. 1 (extr. p. 16). 



1886. Lsetmatophilus, Gerstaecker, Bronn's Klassen und Ordnungen, Bd. v. Abth. ii. p. 493. 

 1886. „ (pars), Norman, Museum Normanianum, pt. iii. Crustacea, p. 17. 



For the original definition of the genus, see Note on Bruzelius, 1859 (p. 312). Boeck 

 sives the following definition : — 



" Sixth and seventh segments of the perseon coalesced. 1 



" Upper Antennas attached to the great frontal process ; flagellum not many-jointed ; 

 accessory flagellum wanting. 



" Lower Antennae equal to the Upper in thickness and length. 



" First and Second Gnathopods with subcheliform hands ; the Second pair the larger. 



" First and Second Perseopods alike in shape, very strong; the third joint very short, 

 the fourth and fifth elongate. 



" The last three pairs of Perseopods alike in shape ; the Fourth longer than the Third, 

 the Fifth than the Fourth. 



" The First Uropods biramous ; the outer ramus shorter than the inner. 



" The Last Uropods tubercular in form." 



1 This is not the case in the species now to he described. 



