160 



A2:>pendices to Fourth Annual Report 



My sis aurantia G. 0, Sars, Beretning om en i Sornmeren 1863 

 foretagen Reise^ p. 20. 



Mysis LamorncE G. 0. Sars, Monograplii over de vecl Norges kysters 

 forelxommende Mysider, ]879, p. 65, pi. xxx. 



This species is known to me from the following localities, whence 

 specimens are in m}'^ collection — Falmouth (A. M. N.), Banff (Mr T. 

 Edward), Sealiam, Co. Durham (Mr G. Hodge), Loch Goil (Mr D. 

 Kobertson), Tarbert, Loch Fyne (Scotch Fishery Laboratory). 



Genus Siriella, Dana. 



( = Cynthia, Thompson.) 



The more tangible generic characters are as follows : — Antennal scale 

 subrhomboidal, the external margin naked until it terminates in a spine, 

 whence it slopes to meet the inner margin, and is similarly setose ; the 

 scale has a small terminal joint, generally furnished with five setae. Pereio- 

 pods seven -jointed, the terminal joint or finger biarticulate and nail- 

 formed, at the end of preceding joint a dense bunch of setae, which are 

 microscopically spined. Telson elongated, linguiform, entire at the apex, 

 furnished with marginal and terminal spines, so arranged that smaller 

 spines alternate with larger. Outer uropods two-jointed, first joint without 

 setae on external margin, but furnished with a series of spines, the three 

 distal spines exceeding the others in size. 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 Clau-sii, G. O. Sars. 



Siriella Clausii G. O. Sars, Middelhavets Mysider, 1876, p. 81, pis. xxix. 

 to xxxi. 



Rostrum acute, triangular, not reaching beyond middle of first joint of 

 antennules. Antenniiles with only one seta on inner margin of last joint 

 of peduncle. Antennal scale subrhomboidal, rather narrow, of nearly 

 equal breadth throughout, not quite reaching the end of peduncle of anten- 

 nules, its extremity extending considerably beyond the spine of external 

 margin. Pereiopods slender, the finger 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 setae between the distal lateral spines ; sides of 

 telson having 3 to 4 spines at base, separated by an interval from those 

 which follow, on the distal portion 3 to 5 smaller spines occupying the 

 intervals between the larger spines. Uropods wider than in crassipes^ 

 the outer with 10 to 12 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 w^ithout smaller intermediates. 



Tarbert, Loch Fyue, April 1886 (Scotch Fishery Board Laboratory). 



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

 (G. O. Sars). 



