534 REPORT ON ZOOLOGY, MDCCCXLIV. 



under the name Crinomorpha ; the animal is said to multiply 

 by gemmation and ova. 



Krohn (Froriep's 11. Notiz, Nr. 533, p. 70) has drawn 

 attention to the remarkable bird's-head-shaped organs of 

 Ccllaria amcularis [Cellularia avicularia], Bicellaria ciliata, 

 and F/ustra avicularis, and, like Nordmann, is unable to 

 throw any light upon the pendulum-like oscillations of these 

 organs. In Retepora celhilosa, and in some Discopori, he 

 met with nipper-like (pincettenformige) organs, but which 

 did not oscillate ; whilst, in the Telegraphina he observed 

 only articulated spines and setre, which were alternately 

 elevated and depressed. Darwin (Voyage of the Beagle, 

 1844,Part 1, p. 252) who instituted experiments on the birdV 

 head organs of various Flustrse, observed, than when the 

 polypes were cut off from the polypidom or destroyed, these 

 organs still continued to move as before. 



Allman (Annals Nat. Hist, xiii, 1844, p. 328) has men- 

 tioned as Irish Arm-polypes, Hydra vulgaris, fusca, and 

 rlridls, [ib. p. 330, is given a synopsis of the genera and 

 species of the fresh-water Zoophytes of Ireland.] A very 

 complete enumeration of all works on fresh-water Polypes, 

 published since 1703, has been undertaken by Van Beneden. 

 (Nouveaux Memoires de 1' Academic cles Sciences et Belles- 

 Lettres de Bruxelles, t. xvi, 1843.) 



A new Sea- Anemone, Actinia (Isacmcea] clavata, disco- 

 vered on the coast of Norway, has been described by Eathke. 

 (Nov. Act. Acad. Nat. Curios, t. xx, P. i, 1813, p. 147.) It 

 has a ferrugineous mantle, a cylindrical body with rounded 

 posterior extremity; and, when extended, presents an elon- 

 gated neck; its sixteen filamentous tentacles, with ochreous 

 spots, are placed in a single series. In another Norwegian 

 Sea- Anemone, with the tentacles arranged in three circles, 

 Kathke recognised the Actinia (Isacmcea} viduata, Mull. 

 According to Thompson (Annals Nat. Hist, xi, 1843, p. 103), 

 Payurus Prideauxii, on the British coast, always occurs 

 associated with Actinia maciihita, Adams. A new Polype, 

 probably intermediate between Actinia and Lucernaria, has 



