THE VOYAGE OF H.M.S. CHALLENGEK. 



Genus Stephanotrochus, 



Stephanotrochus diadema, 

 „ discoid es, 



„ platypus, 



,, nobilis, 



Genus Oyathoceras, 

 Cyathoceras cornu, 

 „ rubescens, 



Genus Sphenotrochus, 



Sphenotrochus rubescen -. 

 Genus Pleuroeyathws, 



Pleurocyafh us brunneus, 

 Genus Desmophylhnii, 



Desmophyllum ingens, 



„ eburiieum. 



„ rililleti, 



Genus Flabellum, 

 Notes on the structure of the soft parts 

 Flabellum angulare, . 

 „ conuis, 



„ patagonichvm, 



,, apertum, . 



„ japonicurn, 

 „ alabastrum, 



„ patens, 



„ stohesi, 



„ australe, . 



,, transversale, 



„ cvrvatum, 



Genus EMzotrochus, 



Rhizotroch us fro.gilis, 

 Family Oculinioe, 



Genus Cyathohelia, 



Gyathohdia axillaris, 

 Genus Neohelia, . 



Nedhelia porceUana, . 

 Genus Bathelia, . 

 Bathelia Candida, 



of species of the genus 



Flabellum 



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