STRETHILL WRIGHT, ON THAUMANTIAS INCONSPICUA. 221 



received the last published part of Claparede and Lach- 

 mann's work,"^ and find that my Ophryodendron is altogether 

 a different species from that described by those authors, 

 although their former specific descriptionf applies to both. 

 It will, therefore, be necessary to describe the genus and 

 species more distinctly, which I propose to do as follows : 



Ophryodendron, Claparede and Lachmann. — Generic de- 

 scription: — ''Body attached to Sertularias and Campanularias, 

 furnished with an extensile proboscis, terminated by a brush 

 of moving tentacles." 



1. Ophryodendron abietintmi, Claparede and Lachmann. — 

 " Body turbinate, attached by a suctorial disc at its lower ex- 

 tremity. Trunk conical, arising from a deep excavation in 

 the upper sm'face of the body. Body covered with thread- 

 cells." 



Found on Campanularia — ? 



2. Ophryodendron sertidaria, T. S. W. 



Corethria ser'tularia, T. S. W.J — " Body oblong, cushion- 

 shaped, attached by its side. Trunk, when extended, a flat 

 nbbon more than twenty times as long as the body, attached 

 within a slight depression on the upper surface of one end of 

 the body. Body destitute of thread-cells." 



Found on Sertidaria pumila. 



On the Reproduction of Thaumantias inconspicua. 

 By T. Strethill Wright. 



I HAVE for several years taken much interest in the repro- 

 duction of the naked-eyed Medusse, and have endeavoured to 

 obtain the polypoid larvae of these creatures; hitherto, how- 

 ever, with very indifferent success, having only succeeded in 

 hatching two, jEquorea vitrina and Turris neglecta. Various 

 species of Thaumantias swarm in the Firth of Forth, near 

 Edinburgh, but when confined they almost invariably ''^cast" 

 their ova, which never become developed into planuloid larvae. 

 This summer I have succeeded in obtaining the polyps in the 

 following manner. 



Three glass vessels, each containing about two gallons, 

 were filled with clean sea-water, and carefully examined for 

 two or three days. On the fourth day six individuals, two 

 males and four females, of T. inconspicua were placed in 



* Op. cit., livraison iii. 



t Op. cit., livraison ii, p. 394. 



X 'Ediub. New Phil. Jour.,' July, 1859. 



