Kalischewskij, M. — Zur Kenntnis der Echinodermenfauna des sibirischen Eismeeres.

St.-Petersbourg, l'Académie Inpériale des Sciences de St.-Pétersbourg, 1907. Large 4to (33.5 x 24.5 cm). 67 pp.; three text figures, several tables, three plates (one in fine chromolithography, two with photos). Original printed wrappers. = A rare and important monograph on Arctic echinoderms, mainly starfish and holothurians, and including new forms (to be regarded as of subspecies-level taxa). Published in the Academy's Mémoires. Uncut. Old stamp on the front wrapper, otherwise a fine clean, unmarked copy.