Mr. W. T. Caiman on n new Pedalion. 333 



the discovery of a second species of the genus in Finland. 

 By the kindness of Dr. Levander the Dundee Museum has 

 lately received some excellently preserved specimens of the 

 new Pedalion fennicuniy from which the annexed figure is 

 taken. Dr. Levander will no doubt in due course figure the 

 species and publish his completed researches on its structure; 

 but meanwhile this figure and the following notes may be 

 temporarily of interest. 



Although bearing a great resemblance to P. mirum, the 

 new species differs from it in many details, of which the 

 following are the most conspicuous : — 



(1) The two striate processes at the posterior end of the body, 



which form a conspicuous feature of P. mirum^ are 

 here wanting. 



(2) The dorso- and ventro-lateral appendages are nearly equal 



in size. In P. mirum the dorsal is the shorter. 



(3) The unpaired ventral appendage hardly reaches beyond 



the posterior end of the body. In P. mirum it is 

 very much longer. 



(4) The bristles of the ventral, and less markedly those of the 



other appendages, for the most part arise in pairs 

 from a common base in a manner similar to that 

 shown in Dr. Schmarda's tignre o^ Hexay'thrapoli/ptera, 



The length is about '23 millim. Only females were found, 

 many bearing one or two reddish eggs attached to the iiinder 

 end of the body. In a i'ew cases a larger number (about ten) 

 of small eggs was seen, which Dr. Levander conjectures with 

 great probability to have been male eggs. 



With regard to tiie habitat. Dr. Levander says : — '' The 

 animal occurred in numbers in a pool of water about two yards 

 square by a foot deep, on a bare granite cliff on the little 

 islet of Lofo, about 12 km. south-west of Helsingfors, in 

 company with Daphnia pulex^ Chydorus sphcericus, and 

 Cyclops, sp. The little pool was about 10 yards from the sea- 

 shore and not a yard above the sea-level ; no vegetation ; grey 

 detritus on the bottom ; the water moderately clear, sweet." 



Ann. & May. N. Hist. Ser. 6. J^ol. xi. 24 



