POLYCLAD FLATWORMS — HYMAN 



577 



12 _^Jl 



Figure 11. — a, Pseudoceros tristriatus. b, c, Nymphozoon bayeri: b, female copulatory 

 apparatus, sagittal view; c, sagittal view of male copulatory apparatus. (Explanation 

 on page 597.) 



present species differs from it only in that the lateral orange stripes 

 do not reach as far posteriorly, hence are not confluent behind the 

 median stripe. This appears an insignificant difference. Stummer- 

 Traunfels' specimen was part of the Semper material collected in the 

 Philippines and the Palau Islands and not^yet published ; the colored 

 figure was made from life by Mrs. Semper. 



