HYDRACARINA : THE GENUS EYLAIS LATR. 123 



are nearly triangular, and are attached to the third pair only 

 at the inner end. The processes at the inner end of the third pair 

 are broad, and extend inwards, while those of the fourth pair are 

 slightly narrower and longer and directed towards the posterior. 



The legs range from about 1'50 mm. in length in the first pair 

 to about 2-30 mm, in the fourth pair. All the segments are of 

 about equal thickness. The claws are long and slender, while the 

 accessory claws are short and broad. 



Surrounding the anus is an irregularly shaped chitinous ring. 



This species, which measures about 2'5 mm. in length, has been 

 found in Surrey as well as at Westport, Louisburg and Clare 

 Island in Ireland. Its continental distribution, so far as present 

 information goes, is limited to Bohemia and Hungary. 



Eylais symmetrica Halb. (PI. 3, fig. 7). 

 1903. Halbert. Ann. Nat. Hist., Ser. 7, vol. xiii. p. 508, fig. 3. 



The eye capsules are reniform with large lenses. The anterior 

 margin of the intercapsular bridge has a rounded hump on each 

 side of a deep V-sbaped depression on the median line. The 

 posterior margin has a deep, narrow bay extending in for about 

 two-thirds the length of the capsule. 



The inner corner of the third segment of the palpi has about 

 ten short spines, some of these being pectinate. Near the well- 

 developed inner margin of the fourth segment four long spines 

 may be found, and at the distal end there is a group of six shorter 

 pectinate spines. 



E. symmetrica is about 4 mm. in length, and at present is only 

 reported from the coast of County Wexford in Ireland. 



Eylais neglecta Thor. (PL 3, fig. 8). 



1899. Sig Thor. Arch. Naturv. Christian, vol. xxi. (5) p. 12, 

 pi. xvii. figs. 156-158. 



The intercapsular bridge is of moderate breadth. The posterior 

 margins form a deep bay which extends to near the middle of the 

 eye capsules. The anterior margin is somewhat sinuate with a 

 short depression on the median line. Behind this, there is a process 

 serving for muscle attachment with a pair of hair pores on each 



JouRN. Q. M. C, Series II.— No. 86. 9 



