APPENDIX. 323 



Beneden, felt doubtful as to the identity of the two. The 

 following is his note on T. calamaris (Van Ben.) : " This 

 is not above half the usual size of T. indivisa, and of a 

 paler colour. It has rather the aspect of a different species; 

 but I should not like to decide without seeing something 

 further of it." 



Genus CORYMORPHA, Sars. 



C. NUTANS, Sars. 

 [ Vide p. 129.] 



THE small specimen of Corymorpha obtained at Fowey 

 Mr. Alder regarded latterly as distinct from C. nutans. 

 He had also found a species at Douglas, Isle of Man, 

 which he thought might be the C. Sarsii of Steenstrup. 

 It is not improbable that the other Norwegian species will 

 be obtained on our shores. 



Family Lafoeidse. 



Genus FILELLUM, Hincks. 



THE chitinous crust assigned to this genus is a very 

 doubtful character. In young specimens, and those which 

 are developed on shell, there is certainly no trace of any- 

 thing of the kind. Where the zoophyte spreads over the 

 stems of Sertularias, and the calycles are densely crowded 

 together, it has a spongy appearance ; but it is difficult to 

 say whether this is due to the presence of a " crust " or to 

 some other cause. 



The Australian genus Lineolaria (Hincks), so far as the 

 polypary affords the means of judging, seems to be nearly 

 related to Filellum. It is furnished with spinous, re- 

 cumbent capsules. 



