122 CHARLES D. SOAR AND W. WILLIAMSON ON 



♦Eylais similis Thon. (PI. 3, fig. 15). 



1899. Karl Thon. Zool. Anz., vol. xxii. p. 446, fig. 2. 



Tlds species is apparently capable of considerable variation in 

 so far as the eye plate is concerned, though there is a measure of 

 resemblance to that of E. rimosa. The capsules here are broader 

 and much straighter at the sides, while the intercapsular bridge is 

 narrower and slightly longer. The posterior edge has a deep recess, 

 varying from a more or less acuminate to a rounded form, and 

 reaches to about the middle of the capsules. The anterior edge 

 is sinuate with a moderately deep median incision. On each side 

 of this incision there is a protuberance with a long hair rising 

 from it and a well-defined ring. The process serving for muscle 

 attachment is quite prominent. 



The palpi are about 0*80 mm. in length, and not so stout as those 

 of E. extendens. The second segment has about eight pectinate 

 bristles at its distal end. The third segment has the distal end of 

 the flexor surface more or less well developed, and carries about 

 twelve short and broad pectinate spines. The extensor surface 

 has four longer bristles. The fourth segment is about as thick 

 and twice as long as the third segment. Its flexor surface carries 

 nine or ten long spines, and at the distal end four or five pectinate 

 bristles. The fifth segment is small, terminating in three or four 

 small claws. 



The capitulum bears some resemblance to that of E. extendens. 

 Its antero-lateral processes are slender and extend to about the 

 level of the base of the postero-lateral ones, which are fairly long 

 and well separated. Both pairs of processes are broadened out 

 towards their extremities, with the distal end rounded. The 

 pseudo-capitulum is low, and not so broad as the anterior end of 

 the capitulum. In its lower portion the pharynx is as broad as 

 the capitulum, tapering up towards the mouth. The meta- 

 pharjnigeal ridge is so close to the distal end as to leave the meta- 

 pharynx reduced to a narrow strip. 



The first pair of the'epimera are of nearly equal width, the inner 

 ends tapering abruptly to a blunt point. The second pair are 

 rather wider at the outer extremity than at the inner, where the 

 processes are so spread out as to resemble a foot in outline. The 

 third pair are much increased at the outer end. The fourth pair 



