342 
THE VOYAGE OF H.M.S. CHALLENGER. 
angle alone slightly projecting. The bristles of this division (PI. XXIIa. fig. 9) resemble 
those of the European species. The superior or setigerous lobe of the inferior division 
differs from the latter in having three well-marked papillae at the tip, and, as also in front, 
the tips of the bristles are perhaps more slender. 
In transverse section this species agrees for the most part with the type observed in 
Eone nordmanni, though certain characteristic differences are present. Thus there is a 
marked median raphe dorsally, covered only by hypoderm and cuticle, while a very thick 
layer of circular fibres spreads out on each side, as far as the bases of the feet. Moreover, 
the dorsal longitudinal muscles have no fold externally as in the British species. The 
nerve-area, however, is similar in position and relations, though it is proportionally larger 
and less tapered superiorly. 
There is no special objection to the view of Ehlers^ that the genus Eone, Malmgren, 
should be merged in that of Goniada, Aud. and Ed., but it should be remembered that 
the structure of the dorsal division of the foot, both in soft parts and bristles, shows a 
decided difference, and the same may be said of the teeth. Further, Ehlers does uot 
mention that between the body- walls of the common forms, Goniada macidata and Eone 
nordmanni, there is this divergence, viz., that in the latter the dorsal longitudinal 
muscles have a well-marked fold inferiorly, while in the former such is not the case. 
Too much weight, however, need not be put on this feature, and the present example is 
devoid of this fold. Wiren^ follows Ehlers in including Eone under Goniada. 
Family Glycertd.®. 
All the Glyceridae in the Challeuger collection occur at moderate depths, none going 
beyond 470 fathoms. In the “Porcupine” Ehlers found several species at considerable 
depths, for instance the ubiquitous Glycera capitata, QErsted, at the 630 fathoms’ line. 
The number of species is six, four of which are new, and this compares fairly with 
the results of other voyages. Thus Gfrube in his Annulata CErstediana gives three 
new species, two in the collection made by the “ Gazelle,” and three in Semper ’s Philippine, 
series. Kinberg again has three new species in the voyage of the “ Eugenie ” ; while 
Schmarda describes no less than eight, but the majority of these were found between 
tide-marks. 
The discrimination of the Glyceridm in spirit is less easily accomplished than in most 
forms, considerable care being necessary. 
As a rule the intestinal canal is empty, a condition either arising from the great 
muscularity of the animal, and its spasmodic contractions on immersion in spirit, or from 
the brief sojourn of the food (sandy mud) in the tract. 
’ Die Borotemviirmer, ii. p. 703. 
^ Vega Exped., Bd. ii. p. 403. 
