ACTINIJi}. 11 



agree generally with the typical cmssicornis, so I have concluded to place " them all 

 under Ehodactinia cvassicornis, probably more nearly approximating to the variety 

 spitzhergensis. 



MEMOIRS EEFEREED TO IN TEXT. 



1. Caelgren, 0.— Zoaiitbarien ; Hamburf;. Ma.walhaens. Sammelreise, Hamburg (1899). 



2. Carlgren, 0. — Die Actiniarien der Olga-Espedition, Wissensch. Meeresunter. Nene Folge, v. Band. 



Abt. Helgoland (1902), Heft 1. 



3. Clubb, J. A. — Actinire. Report on the ' Southern Cross ' Antarctic Expedition. London (1902). 



4. Dana, J. D. Zoophytes. U.S. Exploring Expedition (1838-1812) ; Philadelphia (l.siG). 



5. DuERDEN, J. E. — On the genus Alicia (Cladactis), with an anatomical description of A. costcc. Pane. 



Ann. Mag. Nat. Hist. (G), Vol. xv. (1805). 



6. GosSE, P. H.— On the British Actiuiai. Ann. Mag. Nat. Hist. (3), Vol. i. (1858). 



7. KwiETNiEWSKi, Casimar R. — ' Actiniaria von Ost-Spitzbergen,' Zoologische Jahrbiicher (Syst.) xi. 



(1898). 



8. McMuRRiCH, J. Playfair. — Actinia} of ' Albatross ' Explorations. Proc. United States National 



Museum, Vol. xvi. (1893). 



9. McMurrich, J. Peayfair. — Report on the Hexacfcinite of the Columbia University Expedition to the 



Piiget Sound during the Summer of 189G ; Annals New York Acad. Sci., Vol. xiv., No. 1 (1901.) 



10. McMurrich, J. Playfair. — Zoolog. Jahrb. Supp., vi. (Fauna Chiliensis iii.) ; The Actinias of the 



Plate Collection (1905). 



11. Teale, T. p. — On the Anatomy of Actinia coriacea ; Trans. Phil. Soc. Leeds, i. (1837). 



EXPLANATION OF PLATES. 



b.c. brood chambers, 



c. coelenteron. 



(1. directive mesenteries, 



ec. ectoderm, 



em. embryos, 



en. endoderm. 



in. ec. invagiiuited ectoderm, 



in. en. invaginated endoderm. 



in. mg. invaginated mesogloea. 



in. 0. opening to brood chamber. 



1. m. longitudinal muscle. 



1. m. m. longitudinal muscle of mesentery. 



1. m. t. longitudinal muscles of tentacle, 



mes. mesenteries. 



2 A 



