62 EITLALIA (PTEEOCIRRUS) MACROCEROS. 



anteriorly, more distinctly so posteriorly, where the great elongation of the feet and the 

 lamellae give a character to the region. Posteriorly it terminates in two thick cylindrical 

 cirri (De St. Joseph). 



The proboscis has fine conical papillae at the basal region in extrusion, but they 

 increase in size and become coarse towards the tip, which has a series (12 — 15 ?) of 

 papillae. Forty-eight large blunt papillae surround the entrance to the stomach (De St. 

 Joseph). The last-named author found fragments of Fuci and often gregarines in the 

 alimentary canal. 



The foot has a prominent lanceolate dorsal cirrus (Plate LXVII, fig. 12) with a 

 pointed extremity. The setigerous process beneath tapers towards the tip, which is 

 slightly bifid, the superior division being the more prominent and acute. The bristles 

 are pale and comparatively short with a very slight curvature. The distal end of the 

 shaft is a little dilated and bevelled, but only shows traces of spikes at the end, the 

 translucent region being otherwise structureless, except for a single oblique striation. 

 The somewhat long terminal blade tapers rather abruptly to a fine tip, and has delicate 

 oblique lines and serrations (Plate LXXVII, fig. 3) which slope distally. The process 

 at the tip of the bristle is certainly longer than Claparede shows in his E. limbata. 

 Unfortunately, he has figured neither feet nor bristles in the other species. He describes 

 the dilated end of the shaft as having asperities, and the terminal piece in his figure l 

 is poorly represented. The serrations, though not easily seen, come considerably further 

 downward, beyond the split at the articulation, and the tip is longer and more tapered. 

 This author gives an interesting account of the mucus-glands and bacilliporous follicles 

 of the dorsal and anal cirri. The inferior lamella (cirrus) is also somewhat lanceolate, 

 the tip extending a little beyond that of the setigerous region. 



Reproduction. — Marenzeller (1874) found that the females had in August dark bluish 

 green eggs — occupying all the segments except a few anteriorly and posteriorly. De 

 St. Joseph describes the eggs as green. 



Grube's original description and figure (1860) are, as De St. Joseph observes, fairly 

 accurate, and could scarcely refer to any other form, though the reniform outline of the 

 eyes has not since been observed. The Eulalia volucris of Ehlers is a synonym for the 

 same form according to De St. Joseph, though Ehlers describes the third pair of 

 tentacular cirri as having the ventral cirrus leaf -like as well as that in front. Ehlers (1864) 

 gives a careful account of the structure of the proboscis, which has about forty short 

 papillae at the opening into the stomach. He also describes the leaf -like anal cirri which 

 were absent in Grube's example. 



Claparede in 1868 distinguished the group to which this form belongs, charac- 

 terizing it by the foliaceous condition of the ventral tentacular cirrus of the second 

 segment, and making it a sub-genus under the name of Pterocirrus. 2 He described three 

 species, but he had apparently overlooked the description of Grube, so that his Eulalia 

 (Pterocirrus) velifera is synonymous with Grube's E. macroceros. It may be questioned, 

 indeed, whether the other species — viz. Eulalia (Pterocirrus) limbata and E. marginata — 

 have not a closer connection with his velifera than at first appears. Marenzeller points 



1 Op. cit., pi. xii, fig. 170. 

 3 < Annel. Nap.,' 248, and Suppl., p. 98. 



