88 The Genera of the Flumulariidce, 



borne on the pliylactogonium itself, or on the stem, or in 

 both positions. They do not take the place of the mesial 

 nematophore of the proximal hydrotheca, though in one or 

 two cases these hydrothecse are destitute of a mesial nema- 

 tophore ; but it is suggested that they may represent the 

 nematophores of hydrothec?e which are suppressed. They 

 are usually^ but not always^ branched and antler-like. 



Several species of Cladocarpus are noticeable for being 

 of a more slender and flexuous type than the Statoplea 

 generally, and for having much elongated hydro thecse, v^ith 

 even margins. In one or two species the anterior sarcotheca 

 does not touch the hydrotheca. 



Aglaophenopsis, Feiukes. 



Trophosome as in Aglaophenia. 



Gonangia protected by special ramuli, each of which is a 

 modification of the mesial sarcotheca of the proximal nydro- 

 theca on a pinna. 



The characters relied on by Mr. Fewkes to distinguish this 

 genus from Cladocarpus are the unbranched and jointed 

 condition of the phylactocarp ; but Professor AUman has 

 described a species of Cladocarpus with jointed phylactogonia, 

 and does not consider the branching essential. The phylac- 

 tocarps of Aglaophenopsis, however, are modified from the 

 mesial nematophores of the proximal hydrothecse, while in 

 Cladocarpus they are independent structures, and the genus, 

 if retained, must rest on this distinction. 



Pleurocarpa, Fewkes. 



Trophosome as in Aglaophenia. 



Corbula formed from part of a branch, of which the other 

 portion bears hydrocladia. 



Mr. Fewkes regards the gonosome in this genus as 

 undoubtedly formed from a branch, which seems proved by 

 the presence of the ordinary pinnge on the distal portion; he 

 also considers it homologous with the corbula of Aglaophenia, 

 but this view cannot be correct, as the corbula in that genus 

 is formed from a pinna. The arched ribs forming the corbula 

 are supposed by Professor Allman to represent the phylacto- 

 gonia of Cladocarpus, the pinnee which in that genus support 

 them being here entirely suppressed. Mr. Fewkes, on the 

 other hand, seems to regard them as altered pinnae. If the 



