HYDRACARINA : THE GENUS EYLAIS LATB. 125 



ones. The fifth segment is slightly curved at its distal end. Its 

 inner surface bears ten to twelve strong spines, and its outer 

 surface seven or eight. 



The capitulum is similar to that of E. infundibulifera and is 

 about 0-58 mm. in length. The anterior and posterior processes 

 are long and broad, the posterior pair being rounded at the 

 extremities. 



The legs range from about 2*90 mm. in the first pair to about 

 3*77 mm. in the fourth pair. 



This species has been taken in Ireland at Glendalough Lake, 

 Connemara, Castlebar Lough, Crincaum Lough on Cromaglaum 

 Mountain, Killarney, and in England at Woking. 



*Eylais gigas Piers. (PI. 3, fig. 18). 

 1904. Piersig. Annuaire Mus. St. Petersb. vol. ix. p. 55, fig. 6. 



The intercapsular bridge bears some resemblance to that of E. 

 discreta, but the anterior edge of the bridge is rather more wedge- 

 shaped, its most anterior portion being thickened, with a v-shaped 

 depression in the middle. The posterior edge lies well forward, 

 leaving a deep bay between the capsules which lie obliquely to one 

 another. They are wider at the posterior end than at the anterior, 

 at the inner corner of which there is a long hair. In a single 

 specimen, which was taken in Sweden, the capsules are so close to 

 one another as almost to obliterate the intercapsular bridge. 

 The English material ranges between the type and the Swedish 

 form. 



The third segment of the palp has thirteen to sixteen spines 

 for the most part pectinate, from the rounded anterior end of the 

 flexor surface downwards. The fourth segment has a row of five 

 or six spines on its outer surface. On the ridge ot the flexor 

 surface there are two broad spines. The inner portion of the 

 flexor surface has a double row of bristles for the most part 

 pectinate. The second, third and fifth segments are of nearly 

 equal length, while the fourth segment is nearly double the length 

 of the second. 



This is one of the big species, and is found from 4 mm. upwards 

 in length. Besides being found in Russia and Sweden, it has been 

 found in England in Hampshire, and at the Norfolk Broads. 



