REPORT ON THE ANNELIDA. 
839 
Hyalincecia tubicola, 0. F. MiiJler, var. papuensU. 
Habitat. — This variety was dredged at Station 186 (Torres Strait), September 8, 1874; 
lat. 10° 30' S., long. 142° 18' E. ; depth, 8 fathoms; 
sea-bottom, coral mud. 
The dorsal cirri as well as the branchiae are short. 
The latter commence on the twenty-fifth foot. The pro- 
portions of the feet also differ. Thus the dorsal cirrus 
of the tenth foot has a larger base, and is shorter than 
in the typical form, and the boss or knob of the 
setigerous region is round. The bristles are similar, 
but the posterior hooks in var. papuensis have shorter 
and thicker forks. 
The left great dental plate (Fig. 91) has eleven 
teeth, the right nine ; left lateral paired plate six and 
a few crenations ; unpaired ten. The right lateral 
has about nine and a few crenations at the inner end. 
The mandibles are not ankylosed. 
In minute anatomy this agrees with the typical 
, . ^ • j' Fig. 91.— Maxillre and dental jilates of Hyalincecia 
examples, the great transverse muscle passing trom tubicoia,o.Y. papuensis; x 24 dia- 
, . . . meters. 
Side to side over the nerve-area being conspicuous. 
This approaches the HyalincEcia brevicirris of Grube^ from Eastern Australia, though 
no eyes are present, and the serrations of the dental plates slightly diverge. 
Hyalincecia benthaliana, n. sp. (PI. XL. fig. 3; PI. XXIa. figs. 15, 16). 
Habitat. — A small specimen (dried) was trawled at Station 158 (a point con- 
siderably south of Australia), March 7, 1874; lat. 50° 1' S., long. 123° 4' E. ; depth, 
1800 fathoms; bottom temperature 33°'5, surface temperature 45°'0; sea-bottom, 
Globigerina ooze. 
Unfortunately its condition is such that little can be said about it further than that 
its posterior hooks differ materially from those of Hyalincecia, tiihicola in having the 
upper fang much less produced, and the angle between the two acute and narrow. A 
specimen from one of the posterior feet is figured in PI. XXIa. fig. 15. It cpproaches 
Kinberg’s Onuphis intermedia in regard to the shape of this process. No evidence of 
branched branchiae, however, is noticeable. These organs are simple. The grejdsh-white 
intestinal pellets are chiefly composed of Diatoms. 
1 Monatsber. d. k. preuss. Akad. d. JFiss. Berlin, 1877, p. 527. 
