JAKIA. ^27 



are generally smooth and ever, but sometimes the crust is 

 blistered or raised into small nodules. In the axils of the 

 bi'anches there are often found calcareous tubercles which are 

 undoubtedly the seminal capsules. Some of these, after the 

 calcareous matter has been removed by an acid, may be seen 

 to contain a single blackish grain invested with a membranous 

 bladder; while others, probably more m iture, contain several 

 of an irregular shape, and arranged in an obscure spiral fashion. 

 The structure of the axis is decidedly vegetable, and very si- 

 milar to that of Corallina officinalis, but the reticulation of the 

 internodes is more regular, and the meshes are oblong. I did 

 not discover any vessels permeating the interior, but the con- 

 stricted poi'tions are colourless and fibrous. 



2. J. CORNICULATA, " summlts of the loioer joints of the 

 stem sub-compressed and produced on each side." 



White slender-jointed Coralline, Ellis, Corall. 50, no. 6, pi. 24, 



fig. d, D. 

 Corallina eorniculata, Lin. Syst. edit, x- 806. Pall. Elench. 424. 



Lin. Syst. 1305. Ellis and Soland. Zooph. 121. Berk. Syn. 



i. 2 J 5. Turt. Gmel. iv. 672. Tiirt. Br. Faun. 212. Stew. 



Elem. ii. 440. Lam. Anim. s. Vert. ii. 332 ; 2de edit. ii. 517. 



Risso, I'Europ. Merid. v. 323. Bosc, Vers, iii. 78. Hogg's 



Stock. 38. 

 Jania eorniculata, Latnour- Cor. Flex. 274. Corall. 123. Gray, Brit. 



PI. i. 339. Flem. Brit. Anim. 514. Bellamifs S, Devon, 267, 



ffab. Parasitical on sea-weeds. Found in plenty in Corn- 

 wall, Ellis. 



" This coralline is dichotomous ; the joints of the stems 

 have two horns ; those of the small branches are roundish." 



" I have lately examined some specimens of this coralline 



from Cornwall, and have found that they bear the same kind of 

 ovaries at the angles of their upper divisions in the same man- 

 ner with the two following species (viz. Cor. cristata et sper- 

 mophoros) ; so that it may be a variety of them, or perhaps one 

 of them in another state of growth." Ellis. 



