9G Rev. A. M. Norman on some Crustacea 



Pleopods of female as in Mysis', of male well developed, 

 consisting of two multiarticulate swimming branches, with a 

 curious two-lobed appendage attached to the base of the inner 

 branch, one of these lobes being more or less spirally 

 coiled. 



Siriella Clausii^ G. O. Sars. 

 Siriella Clmisii,G. 0. Sars, Middelhav^ets Mysider, 1876, p. 81, pis. xxix.- 

 xxxi. 



Rostrum acute, triangular, not reaching beyond middle of 

 first joint of antennules. Antennules with only one seta on 

 inner margin of last joint of peduncle. Antennal scale sub- 

 rhomboidal, rather narrow, of nearly equal breadth throughout, 

 not quite reaching the end of peduncle of antennules, its 

 extremity extending considerably beyond the spine of external 

 margin. Pergeopods slender, the linger very slender, its first 

 joint longer in its lesser (that is front) length than broad ; 

 second joint or nail very slender and delicate, only slightly 

 bent. Telson terminating in three spinules of equal length 

 and two setse between the distal lateral spines ; sides of telson 

 having three or four spines at base, separated by an interval 

 from those which follow ; on the distal portion three to five 

 smaller spines occupying the intervals between the larger 

 spines. Uropods wider than in crassipes, the outer with ten 

 to twelve spines on exterior margin of first joint ; second 

 joint broader in proportion than in crassipes^ half as long 

 again as broad. Inner uropods with spines throughout entire 

 length of inner margin to the otolith, but not so crowded 

 towards the base as in crassipes ; smaller spines alternating 

 with the larger on upper portion, but the four or five most 

 distal spines without smaller intermediates. 



Tarbert, Loch Fyne, April 1886 {Scotch Fishery Board 

 Laboratory') . 



Goletta, Cagliari, Syracuse, Messina, and Spezzia, in the 

 Mediterranean {G. 0. Sars). 



[Dec. 15, 1886. — Since received by me from Trieste {Dr. 

 Koelhel) .] 



The distinguishing characters of S. Glausii are the single 

 seta on inner margin of last joint of peduncle of antennules, 

 the slender legs and claws, and three equal-sized spinules 

 between the ultimate spines of the telson. 



Siriella norvegica^ G. O. Sars. 

 Siriella norvegica, G. O. Sars, Untersog. over Christianiafjordens Dyb- 

 vandsfauna, 1869, p. 30 ; Monog. over de ved Norgea Kyster forekom- 

 mende Mysider, 1879, p. 24, pis. xvii. and xviii. 



Very like the last in general characters and in rostrum, 



