IDENTITY OF SOME MARINE ANNELIDS—-HARTMAN 117 
pared. Moore (1911, pp. 294-295) has already given a lucid descrip- 
‘tion, which agrees well with these individuals. The maxillary car- 
riers are about as long as broad, with a lateral constriction at about 
‘the middle, the free ends are broadly rounded. Forceps are falcate; 
maxilla II has five left teeth, 4 right; maxilla III has one broad, 
blunt tooth on each side; maxilla IV has a single point on each 
side. The mandibles are now very thin, translucent (the calcareous 
parts probably dissolved away); the anterior end is flaring, the 
posterior ends slender, the two parts widely separated for more than 
one-third the total length. 
- The distribution of setae is as first described; figure 12, a, shows 
the greatly elongate limbate area of the pointed setae in anterior seg- 
ments; hooded hooks are simple, with minutely denticulate distal 
end (fig. 12,-¢); in postmedian segments they are accompanied by 
very long, slender setae in the inferior part of the fascicle (fig. 12, 0). 
The soft parts of parapodia are now too macerated for identification ; 
the lobes were probably short. 
These specimens were first believed (Moore, 1911) to represent 
perhaps the epitokous phase of Lumbriconereis minuta Treadwell 
(above), but since they differ also in other characters (hooks, maxil- 
lary parts) they are now thought to be different. There have been 
several species of Lwmbrineris described from great depths, most 
‘of them characterized by the presence of long setae in a median 
region. This feature may be an adaptation to life at great depths 
or to a unique type of substratum. Z. punctata McIntosh (1885, p. 
252) from off New York, in 1,240 fathoms, blue mud, and Z. ehlersi 
var. tenuisetis McIntosh (1885, p. 253) from between New York and 
Halifax in 1,340 fathoms, blue mud, are both said to have long, nar- 
rowly limbate setae in a region at about the thirtieth segment. 
L. punctata is different in that maxilla IT has only two teeth on the 
left side and three (or four?) on the right; in Z. eAlersi var. 
tenuisetis maxilla II has five teeth on each side and maxilla III has 
two teeth. Z. abyssorwm McIntosh (1885, p. 250) from off the west- 
ern coast of South America, in 2,225 fathoms, blue mud, was described 
from very fragmentary materials in which the hooks had been lost; 
the longest setae, however, are much shorter than in LZ. moorei. 
Two other species of Zumbrineris with long setae have been 
described from shallower depth—Z. neo-zealandiae McIntosh (1885, 
p. 248) off New Zealand, in 700 fathoms, blue mud, and LZ. kerguelensis 
McIntosh (1885, p. 246) from off Kerguelen, in 110 fathoms, vol- 
canic mud. The first was seemingly based on several species de- 
scribed as “varieties A, B, and D,” of which only “variety A” sup- 
posedly has long setae; “varieties A and B” have dark acicula, 
“variety D” has yellow acicula. The second has composite setae in 
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