216 TRICHYDBJD^E. 



the tentacles. He also states that the polypites show no 

 disposition to hold the tentacles in a double row ; but Van 

 Beneden's testimony is to the opposite effect*. He ranks 

 the species under Eudendrium, with which genus, as now 

 defined, it has little in common. 



Allman includes Tricky dr a amongst the Campanulariidts; 

 but it has no affinity with the typical forms of this family. 

 Any position assigned to it at present can only be regarded 

 as provisional. 



The polypites in many points resemble those of the 

 Lafoeidce and Campanulinidce, and are wholly retractile 

 within the tubular thecae. The latter, though remarkable 

 for their minuteness, exhibit the simple cylindrical form 

 which is met with in some of the Lafoeidte. In the 

 absence of all trustworthy information f respecting the 

 gonosome, I shall make Trichydra the type of an allied 

 family. 



T. PUDICA, T. S. Wright. 



TRICHYDKA PUDICA, Wright, Edinb. New Phil. Journ. (N. S.) for Jan. 1858, 



6, pi. iii. fig. 1. 

 ?EuDENDRit'M PUDICUM, Van Bcneden, Faune Litt. de Belg. Polypes, 116, 



pi. viii. figs. 1, 2. 



Woodcut, fig. 26. 



CffiNOSARc enclosed in a transparent, membranous poly- 

 pary; HYDROTHEC^E cylindrical, even-rimmed, of un- 



* It may perhaps be doubtful whether Van Beneden's zoophyte is iden- 

 tical with the present form, since he represents the polypary as a delicate 

 and transparent covering, which extends over a great part of the body of the 

 polypite, rising much higher than in Wright's figures. In other points it 

 agrees with it. 



t Wright figures a meclusoid (Micr. Journ. iii. 50, pi. vi.) which he found 

 in the vessel containing Trichydra, and fancied might be its sexual zooid ; 

 but he could detect no trace of gonophores on the zoophyte, and we must 

 therefore wait for further evidence. 



