REPORT ON THE ANNELIDA. 
231 
lanceolate, and its tip is rather within the line of the former. The ventral cirrus extends 
about three-fourths the length of the inferior margin of the ventral lobe. 
At the thirty-seventh foot (PL XXXVI. fig. 3) all the lobes are more elongated, more 
slender, and more acute, except the inferior setigerous, which is considerably larger than 
in front. The tips of the inferior bristles of the superior lobe are absent, but judging 
from the size of the shafts they are probably falcate. 
The most marked change in the fifty-fourth foot is the increase in the superior lobe, 
especially at its base, where the glandular masses are. It also projects further outward 
than in front. 
The setose dorsal bristles (the “ aretes homogomphes ” of Claparede) have somewhat 
short tips (PL XVIIa. fig. 3). The transverse markings in the centre of the shaft are 
broken up in a curious manner, so that they have a coarse appearance.’ The tips of the 
falcate bristles (PL XVIIa. fig. 4) have a slightly convex anterior margin. They are the 
“ serpes heterogomphes ” of Claparede. 
The intestine is filled with dark brownish masses containing triradiate and other 
sponge-spicules and a few Diatoms. 
This species comes near Nereis herguelensis. The lobes of the feet, however, are 
longer. It closely agrees with its allies in the structure of the bristles, except in the 
incomplete condition of the transverse bars in the centre of the shaft. The paragnathi 
also diverge from those of other forms, and their absence from the basal ring places it in 
Kiuberg’s genus Ceratonereis. . It approaches especially Ceratonereis mirabilis and 
Ceratonereis vulgata, Kinberg,^ both of which come from the Brazilian coast ; but it is 
distinguished by the length of the cephalic appendages from the former, and by the size 
of the eyes from the latter. The Nereis albicans of Grube, also from Brazil, differs in 
the structure of the feet and bristles. On the other hand, the feet somewhat resemble 
those of Stimpson’s Nereis abyssicola ^ from Long Island, but the want of precision in 
his description leaves room for doubt. 
Family Statjrocephalida;. 
The representatives of this family seem to be as comparatively few in most latitudes, 
as they are small in size. . Grube mentions three sj^ecies from St. Croix and Costa Rica in 
his Annulata OErstediana, under the generic name of Anisoceras, but the latter lapses in 
favour of Staurocephalas, which he had adopted the previous year. In his account of the 
Annelids collected by the German exploring ship “ Gazelle” no example of the genus is 
mentioned. Two, however, are given in his Annulata Semperiana, viz., one from 
Singapore, and the other from Bohol, one of the Philippines, a male with the reproductive 
1 Annulata Nova, op. cit., p. 170 {Ofversigt k. Vetensk.-Akad. Fdrhandl.). 
^ Marine Invertebrata of Grand Manan, p. 33. 
