79 



occurring at the end of the tail between these lamellae, but transferred far in 

 front on the dorsal face of the body, on which account the posterior part of the 

 intestinal canal forms a peculiar coil within the caudal part. Antennas and oral 

 parts very imperfectly developed and densely crowded. Only 4 pairs of rudimentary 

 legs present, the 5th pair being wholly absent. Ovisacs not yet observed. 



Remarks. This is one of the many genera established by Hesse for the 

 peculiar parasites obtained by him from compound Ascidians. Indeed some of 

 the characters distinguishing the present genus are so strange, that it could seem 

 somewhat questionable if it might be included in the same family with the 2 

 preceding genera. Yet, some points of agreement are found to exist with the 

 genus Euteropsis of Aurivillitis, which is regarded as a true Enterocolid. The 

 genus as yet only comprises a single species, to be described below. 



28. Mychophilus roseus, Hesse. 



(PI. XXXVI, 2) 



Mycliopliilus roseus, Hesse, Recherches sur les Crustaces rares ou nouveatix des cotes de France. 



Ann. d. sci. nat. Zoologie, Ser. 5, Vol. IV. 



Syn : Enteropsis warare/isls, Scott. 



Specific Characters. Female. Body slender, cylindrical in form, though 

 having its posterior part always strongly curved dorsally. Cephalic segment 

 comparatively small and somewhat contracted in front, terminating in a very 

 minute knob-like rostral prominence. Trunkal segments only faintly marked, 

 the last one confluent with the tail. Caudal part of body nearly occupying 

 half the entire length, and scarcely at all narrower than the anterior division, 

 its extremity bluntly rounded and carrying 2 very small blade-like caudal rami. 

 Anal orifice occurring nearly in the middle of the dorsal face of the body, 

 and defined by 2 distinctly projecting lips. Posterior part of the intestine rather 

 narrow and forming a more or less deep coil within the tail, ascending along 

 its dorsal face to the anal orifice. Anterior antennae very small, and apparently 

 only composed of 2 joints. Posterior antennas with the distal joint abruptly 

 recurved and terminating in an acute point. Maxillae of a somewhat similar 

 shape, but provided with a small lateral appendage (palp). Maxillipeds poorly 

 developed, imperfectly articulate, and terminating in a very small hook-like 

 point. Legs of uniform appearance, forming simple conical prominences extend- 

 ing laterally and each terminating in 2 very minute chitinous pieces (rudiments 

 of rami). Ovisacs not yet observed. 



Colour of the living animal pale rosy. 



