CflAP. IX. 



TABULAR VIEW. 



355 



Tiaropsis Agass. 



T. diademata xig. See p. 308. — Nuhant, 3Iassac/msc/ts Bay (Agassiz). 

 T. multicirrhata Ag. — Thaumautias multicirrhata 8ars, Beskr., PI. 5, 

 fig. 12. — Norway (Sars). 

 Orthopyxis Ag. — Clytia Lamx., see p. 297. — Silicularia Megeni 

 0. poterium Ag., PI. 28. — Massachusetts Bag (Agassiz). 

 Campanularia volubiliformis, S'ars ; Gegenb., Generat., PI. 1, fig. 8, 

 and Laomedea iutegra Johmt, PI. 28, fig. 2, belong also to 

 this genus. 

 H i n c k s i a Ag} — Campanularia Ilincks. 



H. tincta Ag. — Campanularia tincta Hincks, Ann. and Mag. Nat. 

 Hist., 1861, Vol. VII. PI. 12. — Austmlia (Hincks). 

 8 til Family. Sertularid.e ^ Johnst. 



Dynamena Lamx? (restricted). — Sertularia Lin., Lmlc. 



D. pumila Lamx. See p. 326. — On the European and American 

 shores of the Atlantic (Ellis, Agassiz). 

 Diphasia Ag.^ — Dynamena Lamx. (p.p.). — Sertularia Lmk. (p.p.). 

 D. rosacea Ag. — Sertularia rosacea Lin., Johnst. — Europe (Ellis). 

 Sertularia fallax Johnst.; S. tamarisca Lin.; S. pinaster Ellis and 

 Sol ; 8. margareta Hass. ; S. pinnata Pall ; S. nigra Pall. ; 

 S. fusca Johnst. ; belong also to this genus. 

 Amphisbetia Ag. — Dynamena Lamx. (p.p.). — Sertularia Lmk. (p.p.). 

 A. operculata Ag. — Sertularia operculata Lin. — Europe (Elhs). 



' The genus Ilincksia is characterized by its 

 one-sided, ringled, fertile li^dra. Bimeria vestita 

 Wrigld^^^ltmiceWa. fusca Allm., seems, to belong to 

 this family ; while Reticularia immersa T/iomps. 

 (Campanularia serpens //assaW= Thalia pra;tenuis 

 Allm.), and Coppinia arcta Hassall, apjjear more 

 closely related to Trichydra, p. 351, and through 

 this to Lafcca. Campanularia fruticosa is unques- 

 tionably closely allied to Lafiea. Thus all the 

 known types of Campanulariaus are now referred 

 to known types of Meduste ; they prove to belong 

 to three different families of Medusa^, and they 

 represent three diiferent types of Hydroids. See 

 p. 307. 



^ Hydras in two rows, on opposite sides of the 

 main stem and branches ; ealyeles always sessile, 

 more or less flask-shaped or tubular, with a ten- 



dency to a bilabiated aperture. It is superfluous 

 to fill the references to the works of Ellis and 

 Johnston, which must be in everybody's hands 

 who would study this family. 



^ See p. 326. As here limited, the genus Dy- 

 namena embraces those species the sterile hydra; 

 of which are opposite one another, in successive 

 pairs, with distinctly bilabiate calycle, and the fertile 

 hydra; fusiform, with simple aperture. In the ge- 

 nus Diphasia the fertile hydra; are deeply dentated ; 

 in Amphisbetia the sterile hydra; are slender, the 

 outer edge extending to a prominent point, and 

 the fertile hydras fusiform, with simple aperture. 



* The American representatives of this and the 

 following genera, which are about as numerous as 

 the European ones, will be described on another 

 occasion. 



