Irish Species of Viylais. 509 
length of the eye-capsules; the latter are kidney-shaped, 
with large lenses. 
In lateral view the sides of the capitulum are very deeply 
emarginate, with long side-processes; these do not project 
much beyond the distal margin, which is therefore but 
Fig. 3. 
moderately emarginate. Palps long; length of the three 
terminal segments *25, -46, and ‘18 millim. respectively ; 
inner corner of third segment with about 10 short stout 
spines, a few distinctly feathered. Fourth segment with 
about 4 long spines near the inner margin, which is well 
developed, and a group of 6 shorter strongly feathered spines 
close to the distal margin. 
Locality. Found in brackish water on the coast of County 
Wexford. 
Eylais neglecta, Sig Thor. 
1899. Arch. Naturv. Christian, vol. xxi. p. 12, pl. xvii. figs. 156-158. 
A form resembling this species occurs in Ireland. The 
group to which it belongs is an extremely difficult one to 
differentiate with any degree of certainty. I have taken 
specimens approaching very closely to E. similis, Thon, 
Li. tenera, Thon, EH. rimosa, Piersig, &c., in the structure of 
the eye-plates. Owing, however, to the great variation which 
occurs, I should prefer to treat these Ivish specimens as 
varieties or aberrations of the same species. 
Eylats undulosa, Koenike. 
1897. Abh. Ver. Bremen, Bd. xiv. pp. 283, 295, fie. 2. 
This is certainly an [rish species ; specimens taken in the 
Royal Canal, near Dublin, agree very well with the types 
