HYDRACARINA : THE GENUS EYLAIS LATH. 127 



[E. projectus. Science Gossip, N.S., vol. vii. p. 69. I think 

 this should now be regarded as a form of infundibulifera Koen. 



— W.W.] 



Eylais spinipons Thor. (PI. 3, fig. 21). 



1898. Sig Thor. Arch. Naturv. Christian, vol. xx. (3) p. 9. 



E. spinipons in some specimens seems to come near to E. dis- 

 creta, of which Piersig conjectured it might be a variety. 



In the Irish material the extreme width over the eye capsules 

 was about 0-38 mm., and the length up to 0*23 mm. ; while of two 

 English specimens referable to this species, one from Surrey, with 

 a resemblance to E. discreta, measured correspondingly 0-27 mm. 

 and 0-19 mm. ; the other, from the Norfolk Broads, inclining to 

 resemble E. tenuipons Thor, measured 0-28 mm. and 0*20 mm. 

 The anterior margin of the intercapsular bridge is nearly straight, 

 with a more or less small triangular process, which ends in two 

 small points. The anterior ends of the capsules tend to be broader 

 than the posterior ends, so that the space between the capsules 

 is deep and wide. 



The palpi are stout. The second segment may have up to 

 eight spines on the distal margin, while the third segment may 

 have from twelve to fourteen slender pectinate spines on its 

 moderately well developed inner corner. The fourth segment is 

 well furnished with spines along its inner margin. 



The capitulum is broad and short, moderately emarginate 

 on its anterior margin. The pharynx, which is longer than the 

 air sacs, is narrow and of about the same width throughout. 



E. spinipons was first found in Norway, and has been recorded 

 from Ireland from near Gorey and Enniscorthy, and from near 

 Dublin. The English localities are Surrey, Norfolk Broads and 

 S. Devon. 



* Eylais meridionalis Thon. (PI. 3, fig. 22). 



1899. Karl Thon. Zool. Anz., vol. xxii. p. 445, fig. 5. 



The eye capsules have their margins thick, indicating that they 

 are of a somewhat stout structure. Their anterior end is nearly 

 straight, posteriorly it is rounded, and the sides are moderately 

 emarginate. The intercapsular bridge is narrow, and its length 

 is about half that of the capsules. The anterior portion of the 



