J61_ 



obtained 2 additional specimens, the one ovigerous, at Risor on the south 

 coast. All the specimens were found in the free condition among dredged 

 material procured from moderate depths. Although the integuments are of a 

 rather thin and soft consistency, somewhat similar to that found in the species 

 which live in Ascidians, I have little doubt that the present form, like L. Poucheti, 

 is in reality ectoparasitic in habits, since the caudal setae do not, as in those 

 species, exhibit any obliteration, but are quite normally developed. It remains 

 to be ascertained, however, what animals are at times infested by the 

 present species. 



86. Lichomolgus agilis, (Leydig). 

 (PI. XC). 



Doridicola agilis, Leydig, Zcitschr. f. wissensch. Zoologie, Vol. IV, p. 377, PI. XIV. 



Syn: Eolidicola tcnax, M. Sars. 



Lichomolgns doridicola, Glaus. 



chromodoridis, Delia Valle. 



concinnus, Scott. 



Specific Characters. Female. Body comparatively short and stout, 

 with the anterior division very much dilated, and rounded oval in outline. 

 Cephalic segment large /and evenly rounded in front, exhibiting behind a well 

 marked transverse suture. Tail scarcely attaining half the length of the anterior 

 division; genital segment considerably dilated in its anterior part, and about 

 the length of the 3 succeeding segments combined; anal segment scarcely 

 larger than the preceding one. Caudal rami quite short, not even attaining 

 the length of the anal segment and scarcely longer than they are broad; seta 

 of outer edge attached near the end; apical setae well developed, the inner 

 mediate one being fully as long as the tail; seta of inner comer about twice 

 the length of that of the outer. Anterior antennae very slender, exceeding in 

 length the cephalon, and having the outer 4 joints remarkably long and narrow. 

 Posterior antennae exceedingly powerful, 2nd joint large and muscular, exceeding 

 a little in length the outer 2 joints combined; penultimate joint, as usual, short 

 and oblique, with the middle bristle transformed into a claw-like spine; apical 

 claws 2 in number, the interior one very strong and curved. Maxillae with 

 the terminal lappet rather produced, and forming at the base a slight expansion 

 edged with small denticles; palp comparatively small, trisetose. Anterior 

 maxillipeds with the apical lash less abruptly bent at the base than usual, and 

 edged with rather slender spinules rapidly diminishing in size distally. Posterior 

 maxillipeds with the dactylar joint short and provided outside with a well- 



