Textfig. B. 

 1. Heterodens gegenbauri. 2. Eupterotrachea hippocampus, var. apunctata. 3. Do. do. var. punctata. 4. Eupterotrachea rninuta, a. enlargement like 



figs. 1-5, b. part of the latter, further enlarged. 5. Eupterotrachea coronata. 



