EURYSYLLIS PAPADOXA. 241 



The typical foot (Plate LXXXVII, fig. 13) Las dorsally a short cirrus of about 

 seven or eight segments, the thickest part in the preparations being a little above the 

 base, so that the organ is somewhat fusiform. The setigerous process forms a blunt cone 

 supported by a single strong spine and a fascicle of bristles having the distal ends of the^ 

 shafts enlarged, curved backward, and bevelled for the terminal piece (Plate LXXXVI, 

 fig. 14) which is rather short and boldly bifid, the front edge, moreover, being minutely 

 spinous. The ventral cirrus is comparatively large and lanceolate. 



Claparede first procured this species at Port-Vendres, and distinguished it from 

 8. Krohnii by the difference in coloration, though it resembles it in size, and in the 

 shortness of its tentacles and cirri. He noted especially the prolongation of the intestine 

 forward in front of the proventriculus, and its remarkably moniliform character. 



De St. Joseph found the species propagating in July by stolons which have the form 

 of Tetraglene. The nurse-stock is of a deep yellow and the stolon of a fine rose-colour, 

 the former consisting of thirty-five to forty-four segments, and the latter (female) of 

 thirty-five to forty-one with natatory bristles. As exceptions he has seen a nurse-stock 

 of only fifteen setigerous segments without proboscis, proventriculus, or stomach, and a 

 stolon of thirty-seven segments without swumming bristles. The male stolon with 

 natatory bristles may have thirty-five to thirty -nine segments with testes from the second 

 or third to the third or fifth from the posterior end. Its head is less deeply cleft, the 

 feet less elongated, the body less massive, and the coloration of a deeper rose-colour 

 than in the male of T. Krohnii. 



Genus LIV A. — Eurysyllis, 1 Elders, 1864. 



Head large, fused dorsally with the first segment, without palpi, bearing anteriorly 

 three flattened processes ; four eyes. First segment undifferentiated dorsally, without a 

 foot, but with two stumpy tentacular cirri, the basal process being cylindrical and the 

 terminal ovoid or almost globular, and the cirri which follow have a similar shape. The 

 body is comparatively broad. 



Eurysyllis paradoxa, Claparede, 1864. Plate LXXXVI, fig. 15 — bristle; Plate 



LXXXVII, fig. 3— head, and fig. 14— foot, 



Specific Characters. — Head small, transversely elongated, with two lateral processes 

 anteriorly. Eyes four, reddish, furnished with lenses, and occasionally an additional pair 

 of specks in front. The median tentacle is a broad, flattened truncate process, and the 

 lateral are rounded flattened processes. The palpi are flattened and ovoid. Two short 

 tentacular cirri, the cirrus being globular and attached to a basal ceratophore. The 

 ventral is considerably shorter than the dorsal. Body comparatively short and broad, 

 resembling Sphserosyttis, slightly tapered anteriorly and more so posteriorly, and ending in 

 two globular anal cirri with an intermediate point. Bristled segments about fifty-seven, 

 and the length 3 — 4 mm. Proboscis preceded by six large papillse and with ten denticles 

 on its anterior edge ; proventriculus short and ovoid, narrower in front ; stomach without 



1 Evpvg, broad, and Syllis. 



88 



