BRITISH FRESH WATER ENTOMOSTRACA. 443 



very widely separated. The whole animal, which is about ^^y inch 

 in length, is shown in hg. 9. The shell may be either faintly 

 striped or ornamented with rows of dots. On the whole, the 

 species seems intermediate between A. guttata and A. costata. It 

 is widely distributed in the British Isles, but very rare in the 

 south and east of England. 



A. rostrata (Koch). 



Lynceus rostratas Norman k Brady (17), Hodgson (10). 

 Alo'ilella rostrata Scourfield (26, 29), Sprague (33). 

 A rather rare species even in the south and east of England, 

 where it is commoner than elsewhere in the British Isles. Not 

 yet seen in North Wales. 



Leptorhynchus* Herrick. 

 L. falcatus (Sars). 



Lynceus falcatus Norman & Brady (17). 

 Harporhynchus falcatus Scott (20), Hodgson (10). 

 Apparently more common in Scotland and the north of England 

 than elsew^here in the British Isles. The only place in the south- 

 east of England where I have found it is Fleet Pond, in Hampshire. 

 It has not been recorded from Wales or Ireland. 



Leydigia Kuri*. 



L. quadrangularis (Leydig). 



Lynceus acanthocercoides Norman & Brady (17) (probably). 

 Leydigia acanthocercoides Scourfield (26, 28). 

 Probably not a very rare form, but often overlooked owing to its 

 habit of living on the bottom. 



L. acanthocercoides (Fischer). 



I have taken specimens of this species from Barton Broad, 

 Norfolk; Snaresbrook (Eagle Pond), Essex ; and Richmond Park, 

 Surrey (30). Mr. Kane has found it in Upper Lough Erne 

 and Killyhoman, Ireland. These are the only localities known 

 to me. 



* Canon Norman, in the paper already referred to (page 3(57), proposes 

 Rhynehotalona as the name of this genus, both Leptorliynclins and 

 Harporhynchus having been previously used in zoology. 



