Clare Island Survey — Schizopoda, etc. 



41 9 



Summing up the known geographical range of all the species here recorded 

 we get the result set forth in the following table : — 





Norway. 



British Area. 



Mediterranean. 



Common to all 

 three. 



Nebalia, . . . 



1 



1 



1 



1 



Cumacea, 1 



7 



14 



10 



5 



Euphausiacea, 2 



2 



3 . 



2 



1 



Mysidacea, 2 



11 



19 



13 



5 



Total, 



21 



37 



26 



12 



This table brings out well the fact that the shallow-water marine fauna of 

 the west coast of Ireland is a blending of a northern and southern fauna, the 

 latter element preponderating slightly as a whole and in each separate order. 



Concerning the horizontal and bathymetric distribution of the species here 

 noted definite information is difficult to obtain, owing to the peculiarity of 

 habit already noted for the majority of forms of becoming free-swimming at 

 night. Nebalia bipes is a purely littoral species, not extending below the ten- 

 fathom line. Of the Cumacea, the following species appear to be true littoral 

 forms confined to the ten-fathom limit of the shore : — 



Bodotria pulchella. Diastylis rugosa. 



Iphinoe trispinosa. Cumopsis goodsiri. 



Nannastacus brevicaudatus. 



The seaward limit of the remaining species, as far as at present known, 

 is as follows : — 



Cumella pygmaea, 67 fms. 

 Bodotria scorpioides, 15 fms. 

 Vauntompsonia cristata, 50 fms. 

 Nannastacus unguiculatus, 64 fms. 

 Eudorella truncatula, 1443 fms. 



Pseudocuma longicornis, 58 fms. 

 Pseudocuma similis, 28 fms. 

 Diastylis rostrata, 1063 fms. 

 Diastylis spinosa, 183 fms. 



The three Euphausians are pelagic Crustacea, often extending far out to 

 sea and in water of considerable depth, which reach the maximum of 

 abundance in the adult stage at about the 100-fathom line, and in the 

 young and half-grown stages in considerably shallower water. They are at 



1 Two species peculiar to the British Area. 

 - Une species extends to America. 



U. I. A. PEOC, VOL. XXXI. B 



41 



