56 THREE CRUISES OF TUE “BLAKE.” 
point. The Diopatra (Fig. 270) group begins near the hun- 
dred-fathom line; it becomes particularly numerous at about 
ToS hus 
y LL a MOR 
Fig. 270. — Diopatra glutinatrix. 25, 
500 fathoms, and still has one representative at a depth of nearly 
1,000 fathoms. 
In connection with the important part here taken by the 
Eunicide in the faunal combination of a marine area, it is in- 
teresting to remark that among the annelids of the lithographic 
shales of Bavaria the Eunicide are those which, in various 
forms, are most richly represented. 
One of the most interesting of the deep-water types collected 
WV 
Fig. 771. — Buskiella abyssorum. 4. (MeIntosh.) 
by the * Challenger ” is the eminently embryonie Buskiella (Fig. 
271), which bears the closest resemblance to a chatopod larva. 
Of other families found in deep water, the Polynoide and 
the Aphroditide may be especially mentioned. But as they 
never live in communities, and do not, as a rule, build large 
tubes, they are, lil the Opheltide, less characteristic of the 
localities to which they belong than the Maldanide, or the 
Ampharetide ; their large tubes, built of mud, and sometimes 
associated with those of the Eunicide, must, judging from 
the masses in which they are found, be a marked feature of 
certain localities. 
