It is very generous of Igor Jirkov to provide this very comprehensive book for free in pdf, as I am sure you all agree.
If you don't know much about it go to the annelida archives, where you can find the publication announcement at:
Here is the abstract - because I was unable to find it online, Zoological Record does not seem to have an entry for the book, and it is not in Igor's pdf:
The monography is dedicated to the taxonomy and distribution within the Arctic Ocean of one of basic groups marine macrozoobenthos - Polychaeta. All depths of a water area from the south of the Norwegian Sea and the Greenland Sea up to Bering strait are enveloped. The book consists of two parts. In the general part the external morphology, technique of the collecting and storage the Polychaeta is described. Distribution of Polychaeta within the Arctic has been analyzed in details. In the taxonomy part the original pictorial friendly keys and description of species are included. Species descriptions are mainly based on original material and richly illustrated by original drawings and accompanied by maps of distribution within the Arctic based on original data. Nine new species: Brada streltzovi, Brada tzetlini, Micronephthys hartmannschroederi, Phyllochaetopterus bhaudi, Pista malmgreni, Polycirrus fedorovi, Spio malmgreni, Spio tzetlini, Trichobranchus sikorskii are described. Generic revision of Ampharetidae has been made.
Personal Author: Jirkov, I. A.
Title: Polychaeta of the Arctic Ocean / I.A. Jirkov.
Publication info: Moscow, Russia : Janus-K, 2001.
Physical descrip: 632 p. : ill. ; 30 cm.
Transliterated title: Polikhety severnogo Ledovitogo Okeana.
Note that the new species authorship may differ from the book author, eg spionids are by Sikorski, flabelligerids by Jirkov & Filippova
Geoff Read <g.read from niwa.co.nz>
NIWA is the trading name of the National Institute of Water & Atmospheric Research Ltd.