area occupies a considerable proportion of the length of 

 the cell) as the most primitive, and those in which the 

 upper extremity is modified (as in A. anguina and the 

 Australian A. dilatata) as the younger in the series. 



AETEA ANGUINA, Linnaeus. 

 Plate I. figs. 4, 5. 



SNAKE CORALLINE, Ellis, Corall. 43. no. 11, pi. xxii. figs, c, C, D. 



SERTULARIA ANGUINA, Linn. Syst. (ed. 10) 816, (ed. 12) 1317. 



CELLULARIA ANGUINA, Pall. Blench. 78: Ellis, Phil. Trans. Ivii. 434, 



pi. xix. fig. 10 (in paper on Actinia sociatd). 

 CELLARIA ANGUINA, Ell. $ Sol. Zooph. 26. 

 AKTEA ANGUINA, Lamx. Bull. Soc. Phil. 1812; Pol. Corall. flex. 153, pi. iii. 



fig. 6: Busk, B.M. Cat. i. 31, pi. XT. fig. 1 : Smitt, Kritisk 



Forteckn. iii., (Efvers. Vetensk.-Akad. Forhandl. 1867, 



No. 5, 280 & 2%, pi. xvi. figs. 2-4. 

 FALCARIA ANGUINA, Oken, Lehrb. Naturg. Abth. ii. 91. 

 SERTULARIA MOLLIS, D. Chiaje, An. s. Vert. Nap. iv. 147. 

 ANGUINARIA ANGUINA, Flem. B. A. 542: Lister, Phil. Trans. 1834, 385, 



pi. xii. fig. 4. 

 ANGUINARIA SPATULATA, Lamk. An. s. Vert. (ed. 2) ii. 1% : Johnston, B. Z. 



(ed. 2) 290, pi. i. figs. 7, 8 : Busk, Trans. Micr. Soc. for 



1849, 123, pi. xxvi. : Gosse, DOT. Coast, 141. 



Zocecia white and glossy, more or less bent, spatulate at the 

 upper extremity, ringed, with the exception of the cla- 

 vate portion at the top, which is minutely punctate ; area 

 occupying from about a quarter to a third of the length of 

 the cell ; creeping fibre sinuous, punctulate, swelling out 

 at intervals ; a cell originating from each enlargement. 



RANGE OF VARIATION. The chief variation seems to be in 

 the length of the spatulate extremity, and of the curved 

 anterior portion of the cell. The enlarged spoon-like head 

 is sometimes elongate, sometimes short and regularly 

 oval in form. There are also differences in the degree in 

 which the upper extremity of the cell is bent and the 

 point at which the curvature commences. But I have not 



