GONOTKYR^EA LOVENI. 181 



carried upwards by the growth of the axial column, and 

 at length is pushed beyond the orifice of the capsule, and 

 remains attached externally until the contents are matured 

 and discharged, when it withers away. The gonozooid in 

 this genus combines to some extent the characters of the 

 free and fixed forms; it links the one to the other, and 

 shows the impossibility of separating them structurally by 

 any hard line of demarcation. 



1. G. LOVENI, Allman. 



" SEA-THREAD CORALLINE," Ellis, Corall. pi. xii. C, and xxxviii. B. 



CAMPANULARIA DICHOTOMA, Lister, Phil. Trans. 1834; Van Beneden, Faune 



Litt. de Belg. Polypes, 156, pi. xv. figs. 1-4. 



,, GENICULATA, Lovhi, Wiegmann's Arcbiv, 1837; Schultzc, 



Muller's Archiv, 1851 ; Van Beneden, Mem. sur les Cam- 

 pan. 34, pi. iii. figs. 1 & 6V 



LAOMEDEA DICHOTOMA, T. Strethitt Wright, Edinb. New Phil. Journ. (N. S.) 



for Jan. 1859. 

 ., LOVENI, Allman, Ann. N. H. for August 1859. 



GONOTHYK.EA LOVENI, Allman, Ann. N. H. for May 1864. 



Plate XXV. fig. 2. 



STEM erect, flexuous, irregularly branched, annulated above 

 the origin of the branches and polypiferous rarnuli; HY- 

 DROTHECjE alternate, deeply campanulate, narrow, the 

 margin with 10 small and blunt denticles, borne on short 

 ramuli, which are ringed throughout; GONOTHEC^E broad 

 and truncate at the top, tapering off to the base (obconic], 

 supported on short annulated stalks, axillary, carrying 

 on the summit, when mature, from 2 to 5 of the extra- 

 capsular sporosacs. 



THE history of this species is interesting. Its peculiar 

 mode of reproduction was noticed by Ellis, who has' given 

 an excellent figure of it, but identifies it with his Sea- 

 thread Coralline. Lister, in his well-known paper in the 

 'Philosophical Transactions' (1834), described the male 



