HYDRACARINA : THE GENUS EYLAIS LATR. 121 



soari, the extreme width over the capsules being from 0*45 mm. 

 to 0*48 mm., and their length about 0'25 mm. The intercapsular 

 bridge is rather broader and longer than in the type, with 

 the posterior emargination variable in character, being rounded 

 or more or less angled. 



The palpi are stout and are about 1*20 mm. in length. The 

 flexor surface of the third segment is well developed distally, and 

 has from fourteen to eighteen short spines, the innermost ones 

 being -weakly pectinate. The fourth segment is also strongly 

 developed with about six long spines, and four or five pectinate 

 ones close to the distal margin. A specimen taken at the Norfolk 

 Broads is referable to this variety. 



* Eylais koenikei Halb. (PL 3, fig. 6). 



1903. Halbert. Ann. Nat. Hist., Ser. 7, vol. xxii. p. 507, 

 figs. 2-2a. 



This species appears to be of a more rotund form than is usual 

 in the genus. The length is about 3 mm. 



The intercapsular bridge is subject to some variation in re- 

 gard to its position at the anterior end of the eye capsules. It 

 is very slender and decreases in width towards the small oval 

 process in the centre of the bridge. Between this and each eye 

 capsule there is a small hair papilla variable as to its position. 

 The capsules are roughly quadrate in outline with large pores. 

 The anterior and outer margins are weakly rounded, while the 

 inner margin is emarginate, bulging out posteriorly. 



The palpi are rather long and slender. The second segment has 

 four or five weakly pectinate spines on its distal inner surface. 

 The third segment has seven or eight short, stout spines also on 

 its distal inner surface, one or two of these being pectinate. The 

 fourth segment has about ten spines towards its inner surface. 

 On the outer side there are seven long bristles. 



The capitulum is about 0'6 mm. in length. Its lateral and 

 posterior margins are moderately curved, the latter outwards in 

 the centre. The pharynx is broad, being very much distended 

 in its anterior portion. 



E. hoenikei has been taken at Ardfry, co. Galway, and Lough 

 Gullion, CO. Armagh, and at the Norfolk Broads. 



