Copepoda from the Falkland Islands. 375 



the two immediately preceding. The formula shows approxi- 

 mately the proportional lengths of the various joints : — 



1.2.3.4.5.6. 7 

 10 14 15 5 5 6 6" 



Antenna? small, the outer ramus rudimentary and repre- 

 sented by two minute setae (fig. 11). Second maxillipeds 

 moderately stout and armed with a long terminal claw 

 (fig. 12). The first pair of thoracic legs are tolerably stout 

 and the inner ramus is furnished with a long and stout 

 terminal claw ; the outer ramus, which consists of three 

 joints, is only about halt' as long as the first joint of the inner 

 ramus (fig. 13). The fifth pair are broadly foliaceous ; the 

 inner portion of the proximal joint is somewhat expanded, 

 and its distal end is obliquely truncated and furnished with 

 four seta?, and there is also a seta on the inner margin ; the 

 two outermost setae are close together, but the others are 

 more widely apart ; the outer joint is suborbicular and bears 

 six setae round its distal end, as shown in the drawing 

 (fig. 14). The caudal rami are short and scarcely equal in 

 length to the last segment of the abdomen. 



The male was not observed. 



This species has a general resemblance to Laophonte 

 gracilipes, G. S. Brady, as already stated * ; but the antennae 

 have no outer ramus, and there is also a difference in the 

 form of the fifth pair of thoracic legs. 



M O N S T R I L L O I D A. 



Fam. Monstrillidse. 



Genus Monstrilla, Dana, 1848. 



Monstrilla mixta, sp. n. (PI. XVI. figs. 8-12.) 



Female. — In its general appearance and structure this 

 form is somewhat similar to Monstrilla conjunctiva, Giesb., 

 described in his account of the Copepoda of the Belgian 

 Expedition, 1897-1898-1899 f. 



The body is moderately slender and elongated ; the length 

 of the specimen represented by the drawing (fig. 8) is about 

 2£ mm. ; the proximal segment is fully half the entire length 



* Cf. ' Die marinen Copepoclen der Deutsche Siidpolar Exped. 1901- 

 1903,' p. 562. 



t ' Exped. Antarctic Beige : Copepoden,' p. 40, Taf. xii. figs. 1-6 

 (1902). 



