380 REV. A. 31. NORMAN AND MR. G. S. BRADY 



A much smaller species than L. quadrangular is, and distin- 

 guished from it by the much greater comparative breadth of the 

 carapace, its more distinct striation, and by the character of the 

 abdomen and its appendages. 



Found in an old colliery pond at Bishop-Hiddleham, and in a 

 pond near Houghton-le- Spring, county of Durham ; at Rothley, 

 Aird, Capheaton, Crag, Grindon, and Chartners Loughs, North- 

 umberland (A. M. N.) ; Wallington, and Belsay Lake, Northum- 

 berland ; Loch Skene and Lochmaben, Dumfriesshire ; Lochend 

 Loch, Kirkcudbrightshire ; Connemara (G. S. B.). First de- 

 scribed by Gr. 0. Sars from Norway. 



7. Lyncetjs GTXTTATtrs, O. 0. Sars. PI. XVIII, fig. 6; and 

 PI. XXI, fig. 10. 



1862. Alona guttata, G. 0. Sars. Om de i Omegnen af Chris- 

 tiania forkommende Cladocerer. Andet Bidrag., p. 38. 



Very like the last, but even shorter and broader. Carapace 

 faintly striate longitudinally, and sometimes sculptured on the 

 posterior portion with closely arranged circular pit-like impres- 

 sions. Eye-spot midway between the eye and the extremity of 

 the rostrum. Abdomen still shorter than in L. costatus, and 

 having the superior margin straight posteally, and bearing from 

 seven to ten ("eight to ten," Sars) spines, but hollowed out 

 between the most anterior of the spines and the angle which is 

 situated midway between that spine and the origin of the two ' 

 abdominal seta?. Length, - 6 Vth of an inch. 



Closely allied to L. costatus, from which it may chiefly be 

 distinguished by the cellular impressions (not always however 

 evident) of the hinder part of the carapace, and by the form of 

 the abdomen, which is furnished with fewer spines, and has a 

 concavity in the superior margin immediately anterior to the 

 spines. 



Described by Gr. 0. Sars from Norwegian specimens. First 

 found in Great Britain in a small pond at East Herrington, in 

 the county of Durham, and subsequently in Sweethope Lough, 

 Northumberland, by A. M. N. ; also in ponds at Marsden, county 



