Tesch J.J. - Thiele J,, — Pteropoda + Solenogastres

1913. Berlin, De Gruyter. In 8vo, red cloth, pp.154 with 108 figs. + 55 with 28 figs. Das Tierreich vol. 36 and 28 bound together. Original wrappers preserved. This series started in 1896 was completed with volume 113 (1999). Each volume is a high-level monograph on a particular group or species. Volumes are rare and hard to find.