274 
THE VOYAGE OF H.M.S. CHALLENGER. 
The maxillae (Fig. 34) are more arched than in the European examples. The left 
great dental plate has six teeth and the right seven. The left lateral paired plate has 
about eight teeth, while the unpaired plate of the same side has nine. The paired plate 
on the right has twelve or thirteen small teeth. The mandibles (Fig. 35) resemble those 
of the European species. 
The branchise commence on the third foot in each form. In the foreign example the 
branchia of the tenth foot has two divisions, that of the twentieth four (PI. XXXVIII. fig. 
2), the thirtieth four, and the fortieth none. Indeed the branchise generally cease about 
the thirty-eighth or thirty-ninth foot. The divisions of the branchise are well marked 
and rather long. In the Norwegian species the branchise on the tenth foot have four 
divisions, on the twentieth foot six, and on the thntieth four or five. In the branchise 
of the form procured by the Challenger are numerous circular concretions resembling 
ova ; their nature, however, is problematical. 
The bristles on the whole resemble those of the Norwegian species, though their 
proportionally larger size brings out certain features more clearly. The distal pieces of 
the jointed bristles (PL XIXa. fig. 14) show no decided difference when contrasted with 
the organs from the same foot (twentieth) of the European species (PI. XIXa. fig. 15). 
The brush-shaped bristles also correspond. 
The caudal styles present evident articulations in correspondence with the condition 
of the other processes. 
One example occurred in a chitinous tube strengthened with fragments of a Polyzoon 
like Cellaria Jistulosa, minute Mollusks, Lepralice and other shell-fragments, after the 
manner of the British Thelepus. 
The branchise of the small specimen from Station 49 cease about the fortieth foot, 
and have from eight to eleven branches. The maxdlse correspond with those of the 
previous example, and the left great dental plate similarly shows six teeth, the right 
seven teeth. The left lateral paired plate has eight, the left unpaired nine, and the same 
plate on the right nine or ten. 
Some of the specimens from Marion Island have well-developed ova. 
The food of the example from Station 45 (1240 fathoms) consisted of dark muddy 
material containing sponge - spicules, minute Globigerinse, and other Foraminifera, 
Radiolarians, and particles of sand ; while the pellets in some from Station 49 were 
composed of sandy mud less rich in sponge-spicules. Diatoms, and other organic structures. 
The intestines of those from Marion Island presented masses teeming with a series of 
beautiful Diatoms, various sponge-spicules, remarkable reticulated plates pertaining to an 
Echinoderm (somewhat resembling the anchor-plates of Synapta, but less regular), besides 
larger plates, closely arranged together, yet apparently belonging to the same group, 
and many other curious structures. 
This species in transverse section shows a large and wide nerve-area, somewhat like that 
