210 COPEPODA. 



1865. Elytrophoru Irachyptera, Heller, Reise ' Novara,' Crustnceen, 



p. 189, pi. xvii. 

 1896. Elytropliora brachyptcra, Bassett-Srnith, p. 12, pi. iv. fig. 3. 



Ten specimens from a large Tunny ( Tlti/nnus thynnus) taken 

 outside Plymouth (Bassett- Smith}. 



LiJTKENIA ASTERODERMI, CklUS. (PI. XXII. figs. 9. 10 ; 



PI. XXIV. figs. 1-8.) 



1864. Liltkenia asterodermi, Glaus, " Beitr. z. Kennt. der Schmarotz- 

 krebse," Zeit. f. wiss. Zool. vol. xiv. p. 369, pi. xxxiv. figs. 10-15. 



1867. Cecropsina glabra, Heller, Reise ' Novara,' Crustaceen, 

 p. 209, pi. xix. figs. 1, 2. 



Cephalosome nearly round, deeply hollowed out posteriorly 

 between the lateral areas and the metasomatic central portion ; 

 lateral areas rounded distally. The last segment of the meta- 

 some produced into leaf-like dorsal expansions, well rounded 

 posteriorly and separated from each other dorsally through 

 part of their length. First (genital) segment of the urosome 

 greatly produced backwards into two elongated lobes, which 

 completely overhang and hide the second segment of the 

 urosome and its uropodal plates, which latter can only be 

 seen from the ventral aspect. Seen from below (fig. 8) the 

 second segment of the urosome is much broader than lonw 



O r"> 



and somewhat lozenge-shaped ; it bears two uropodal plates 

 which are broadly ovate, with a few small spinules at their 

 extremity. The antennules (fig. 1) are very small; the second 

 joint slender, subequal to the first in length. The antennae 

 (fig. 2) are sickle-shaped, usually with one or two nodulous 

 processes on the inner side. The first maxillipeds (fig. 3) 

 terminate in three claws a pair of equal length and a central 

 longer claw. The second maxillipeds (PI. XXII. fig. 10) are of 

 immense size, terminating in a powerful, gradually attenuated, 

 strong, well-curved claw, which is acute at the extremity. 

 The first feet (fig. 7) are very small, but two branched ; 

 inner branch minute, simple, not half the length of the first 

 joint of the outer branch ; outer branch two-jointed, first 

 joint with only a single distal spine ; second joint obliquely 

 truncate at the extremity, where there are three or four little 

 spines. Second and third feet two-branched, and their 

 branches two-jointed ; their structure will be best understood 

 by examination of the drawings (figs. 5 and 6). The fourth 

 feet (fig. 7) have also two branches, but the branches consist 

 of only a single joint, and the inner branch is very minute. 



Three specimens were sent to A. M. N. by Laughrin about 

 1862, which had been obtained bv him from Lavdrus imperialis 



