70 ANAITIS. 



The differences of Webster's Eumida maculosa, 1 dredged on shells in 5 — 10 fathoms 

 off the Virginian coast, seem to be very slight — indeed only of coloration. 



A variety with a larger ventral cirrus was procured in Gal way in 1868 by Professor 

 B. P. Wright, of Dublin, the main feature being the size of the lanceolate ventral cirrus, 

 the pointed tip of which projected considerably beyond the setigerous process. The 

 minute structure of the bristles agreed with that in E. sanguinea. Malmgren gives Sige 

 fusigera a lanceolate and pointed ventral cirrus like the foregoing, but there is no reason 

 for separation in the present case. 



The points of distinction claimed by Gravier (1897) for his Eumida communis, viz., 

 coloration, rounded form of the dorsal cirri, great development of the setigerous lobe 

 next the ventral cirrus, and the condition of the bristles, do not seem to form stable 

 grounds on which to base separation from E. sanguinea. 



The foot of Eidalia (Ptero cirrus) microcephala, Claparede, 2 as subsequently shown 

 by De St. Joseph, 8 would readily be taken for that of Eumida sanguinea or one of 

 its many varieties. 



Several varieties of Eumida sanguinea occur in the deeper water of St. Andrews 

 Bay, the eyes being larger in one, the setigerous lobe of the foot more prominent in 

 others, the dorsal cirri smaller than usual and the ventral varying in length, but the 

 median tentacle remains shorter than the lateral and the bristles do not differ from the 

 type. One specially soft form shows slight differences in the structure of the end of the 

 shaft of the bristles, which are more abruptly truncated. 



Genus XXXIII. — Anaitis, Malmgren, 1865. 



Head broad, rounded anteriorly, slightly sinuous posteriorly, somewhat indistinctly 

 separated from the first segment. Four short tentacles. Two eyes of moderate size. 

 Four tentacular cirri on each side, the first, second, and third fixed to the first segment, 

 the fourth to the second segment. Superior cirri of the feet large and imbricate back- 

 wards. Ventral cirri compressed, a little longer than the setigerous part of the foot. 

 The latter is ovate, diminishing at the tip, and slightly bifid. Bristles numerous, 

 compound, terminal sabre long and tapered, minutely serrated on the edge. Two 

 sub -globose anal cirri. 



I have some hesitation in adopting this genus — the species included in it requiring 

 more exhaustive examination. 



Grube (1879) described the posterior border of the head in Anaitis as arising from a 

 median arch, whilst Levinsen thought it was soldered with the first segment. There are, 

 it is stated, three pairs of tentacular cirri. Grube places Phyllodoce Paretti, Blv., here. 

 Anaitis rosea, McL, he ranges under the group b 2 , in which segment 2 is smaller. 



Claparede (1868) notes that the essential distinction between this and Phyllodoce is 



1 ' Trans. Albany Instit./ ix, p. 15, pi. iv, figs. 38—41, 1879. 



2 ' Annel. Nap., Suppl./ 1870, p. 98, pi. ix, fig. 3. 



3 c Ann. Sc. Nat./ 9 e ser., t. iii, p. 225, pi. v, figs. 99—103, 1906. 



