38 Proceedings of the Royal Irish Academy. 



(3) Colony delicate, blanched in one plane ; branches tending to 



arise from one side — J. racemosa Wright and Studer. 



B, Longitudinal main canals three in number. 



(4) Colony branched as in J. gemmacea —J. trilineata Thomson and 



Henderson. 



X. — Juncella juncea. 



Junci lapidci Pliny, Hist. Nat., p. 13, c. 2.5. 

 Palmijunctis albus, Eumph, Ami), vi, p. 12G. 

 Keratopht/ton simplex Seba, Thes. Ill, t. 105, fig. la. 

 Gonjonia juncea Pallas, xxviii, p. 180. 



„ „ Pallas, xxvii, p. 226. 



„ „ Esper, vii, ii, p. 26, PI. lii. 



„ „ Lamarck, xxiv, ii, p. 15, n. 34. 



„ „ Lamouroux, xxv, p. 419. 



„ „ Uana, iii, p. 664. 



Helicella „ Gray, xi, p. 481. 



Juncella „ Val., xvi, p. 14. 



Val., xlv, p. 182. 



„ „ Milne-Edwards and Hainie, xxvi, p. 186. 



„ „ Verrill, xlvii, p. 37. 



,. „ Gray, xii, p. 204. 



Kolliker, xNiii, p. 140, t. 18, f. 45, 46. 

 „ Thomson and Henderson, xxxix, p. 314. 



„ gemmacea Thomson and Henderson, xxxix, p. 313, PI. iv, figs. 4 

 and 5. 



„ juncea Eidley, xxxiii, p. 345. 



Gray, xii, p. 25. 



„ „ Hickson, xv, p. 820. 



„ „ Studer, xxxiv, p. 659. 



, „ Studer, xxxvii, p. 116. 



Wright and Studer, 1, p. 158, PL xxxiv, fig. 12 ; PL xli, 

 fig. 38. 



>, „ Kent Saville, xxi, p. 92. 



„ Jlexilis Studer. 



„ „ Germanos, viii. 



., „ Hickson, xv, p. 821. 



„ fragilis Pddley, xxxiii, p. 347, PI. XXXI, fig. D. 



,. „ var., xxxiii. 



:> „ Thomson and Henderson, xxxix, p. 314. 



