PLATE y>lA — Continued. 



Fig. 27. Collar seta turned, showing upper surface. 



28. Uncial plate from thorax, in profile. 



29. Collar seta, in profile. 



30. Odd seta of third thoracic fascicle, end spread open. 



31. Spirorbis asperattis sp. nov., p. 245. Uncial plate; apparent aspect. 



of front surface. 



32. Uncial plate from thorax, in profile. 



All figures by the author, X 355. except 11 and 31, more enlarged. 



(340 



