Copcpoda from the Falkland Islands. 371 



G. S. Brady, but diffors in the structure of the second 

 maxillipeds and in some other anatomical details. 



Fam. Tisbeidse. 



Genus Tisbe, Liiljeborg. 



Tishe varians, sp. n. (PI. XIV. figs. 6-12.) 



Female. — Antennules moderately elongated and composed 

 of joints ; the first two joints are tolerably stout, but the 

 second is distinctly longer than the first or third ; the others 

 are small, especially the penultimate joint, wbich is only 

 about half the size of the one on cither side. The formula 

 shows api)roximatcly the lengths of the various joints : — 



1.2.3.4.5.6.7.8 



14 21 16 10 6A bh 3 G' 



Antennse small, the outer ramus four- jointed. Second 

 maxillipeds tolerably stout and armed witli a strong terminal 

 claw. First pair of thoracic legs also tolerably stout ; the 

 outer ramus is rather longer than the first joint of the inner 

 one ; the first and second joints are subequal, and the seta 

 on the outer distal angle of the first joint is stout and spini- 

 form, so also is the seta at the base of the joint; end joint 

 short and fninished with slender setae on its truncated extre- 

 mity ; first joint of the inner ramus moderately expanded 

 and reaching nearly to the end of the outer ramus ; it is 

 piovided with a tolerably long seta on the lower half of the 

 inner margin ; a stout spinitorm seta also springs from the 

 inner aspect of the basal joint and close to the proximal end 

 of the inner ran)us ; the second joint of the inner ramus is 

 narrower and rather longer than the first, and a long seta 

 springs from near the proximal end of the iinier margin ; 

 the end joint is very small and is provided with two short 

 claw-like terminal s[)incs (hg. 9). Other natatory legs 

 shndcr and moderately elongated, as shown by the drawing 

 (fig. 10}, which represents the fourth pair. Fifth pair small 

 and not very conspicuous ; the end joint is moderately 

 narrow and elongated, and bears five moderately slender 

 sette round the distal end. Caudal rami short, scarcely 

 longer than the last abdominal segment. 



A few specimens of this species were obtained on a ma-s 

 of fish ova found by Mr. Vallentin on the shore at low-water 

 springs. 



This Tisbe resembles in some respects the Tishe urmuta^ 



2G* 



