Illaenus sp. 1 .

Figs 14.9, 10

1915 Illaenus aff. portlocki Reed, pl. 7, figs 8,9.

Material. Pygidium from Hwe Maung Beds (uppermost Katian) at Hwe Maung, Fig. 14.9 (Reed, 1915, pl. 7, fig. 8), GSI 11539; cranidium from Upper Naungkangyi Beds at Man Ngai, Fig. 14.10 (Reed, 1915, pl. 7, fig. 9), GSI 11540.

Remarks. These two sclerites may not belong to the same species. The internal mould of the cranidium shows evidence of carrying raised transverse ridges anteriorly which may have been strong on the dorsal surface. The same feature is seen on Illaenus sp. 3 from Yunnan, but not enough is known of either species to prove they are the same species.