ZOANTHARIA 



Section III. 



Description of the species. 



Family Macrocneminae Haddon & Shackleton 1891. 

 Genus Epizoanthus. Gray 1867. 



Macronemic Zoantharia with a single mesogloeal sphincter muscle. The body wall is incrusted. 

 The ectoderm is usually continuous but may be discontinuous; cell-islets and lacunae often in the 

 mesoglcea. Dioecious polyps connected by coenenchyme, which may be band-like, incrusting or greatly 

 reduced, as in the free forms. 



As Haddon and Shackleton have given a good diagnosis of the genus, I have used it 

 in the main here. Of the n Epizoanthus species described here 4 are new: lindahli, danielsseni, 

 beerenislandicus and koreni. E. incrustatus and paguruphilus have previously been described in detail by 

 Haddon and Shackleton (1891) but their description needs supplementing on several points. 

 Regarding E. norvegicus these authors also give some anatomical information and show that Mardazl 

 erdmanni Dan. is an Epizoanthus-species. The other species are described entirely from outer appearance 

 or the anatomical description is so bad, that it cannot be used for a characterization of the species. 



Four of the species E. incrustatus, pagiiriphilus, lindahli and koreni have been dredged by the 

 Ingolf-Expedition. 



Synopsis of the Epizoanthus-s^eue^ described here 



A. Species with carcinoecium 



a. Without ventral polyp. Ectoderm of the body wall continuous. 



b. The capitular region of the polyps in the contracted state truncate, disc-like, number of 



mesenteries 32 42 incrustatus. 



bb. The capitular region of the polyps in the contracted state not truncate, not disc-like, 



number of mesenteries about 46 abyssorum. 



aa. With ventral polyp. The ectoderm of the body wall discontinuous, except in the capitular 

 region ; number of mesenteries 64 80 paguriphilus. 



B. Species without carcinoecium 



a. The ectoderm of the body wall in the polyp discontinuous norvegicus. 



aa. The ectoderm of the body wall in the polyp continuous, 

 b. Single unattached polyps or free colonies. 



The Ingolf-Expedition. V. 4. 2 



