io6 



specimen consist of three zooecia each, and the number then rises to a much larger one. The 

 formula of this fragment is as follows: — 



(i) + (i) + (i)+(i)+(i) + (3) + ( 3 + k) + (ii +r, + 2 r + r 5 + x). 

 Another, on the same slide, is: — 



(3) + (5 + i' + r,) + (6 + r, + 2>-) + (2 + ;-, + x). 

 In hg. 10 it will be noticed that two of the internodes have an even number of zooecia 

 (4), and that the first of these two has no branch, while the second produces a branch from 

 its lowest zooecium. One of these internodes shows the elongated peristomes, angulated at their 

 base, which seem to be characteristic of the present species. The formula of the fragment 

 from Stat. 321 is: — 



(6 + ir + r 2 ) + (6 + v + r,) + (6 + v + ;-.,) + (1 + v + x) 



(9 + 2') + (3) 



(*) 



(5 + 2'- + *) 

 (6 + ;- 2 ) + (.v) (2H 



The single ovicell (fig. 11) is of the same general type as in C. cuncata, but it is 

 considerably smaller. It is seen from the side, a position which shows the free character of its 

 inflated region to aclvantage. The ooeciostome is short but distinct, and it is produced into a 

 point beyond the ooeciopore. 



M easuremen ts , in fj.: — 



Diameter of orifices, 60 ; 



Distance apart of zooecia, of the same side of the branch, 300 — 400 ; 



Width of branch, 100 — 150; 



Length of ovicell (projection from frontal side of branch), 335; 



Width of ovicell, 170. 



4. Crisia geniculata Milne Edwards. (PI. VIII, fig. 12). 



Crisia geniculata Milne Edwards, 1838, "Mém. Crisies", Arm. Sci. Nat., Zool., (2) IX, p. 197, 



PI. VI, figs 1— ie. 

 Crisia geniculata Harmer, 1891, "Brit. Spp. Crisia", Quart. J. Mier. Sci., XXXII, p. 172, 



PI. XII, figs 7, 8. 

 Crisia geniculata Duerden, 1S93, "New and rare Irish Pol.", Proc. R. Irish Acad. (3) III, 



p. 126. 

 Crisia geniculata Jullien & Calvet, 1903, "Rés. Camp. Prince de Monaco", XXIII, p. 1 10. 

 Crisia geniculata Robertson, 19 10, "Cycl. Bry. W. Coast N. America", Univ. Calif. Publ., 



Zool., VI, N° 12, p. 235, PI. XVIII, figs 6, 7; PI. XIX, fig. 8. 

 Filicrisia geniculata D'Orbigny, 1853, "Pal. Frang. Terr. Crét." V, p. 604. 

 Crisidia cornuta, var. geniculata Busk, 1S75, "Cat. Mar. Pol. Brit. Mus.", III, p. 3, PI. I, 



figs 1—4. 

 Crisia cornuta, var. geniculata Hincks, 1SS0, "Hist. Brit. Mar. Pol.", p. 419, PI. LVI, fig. 4. 

 Crisia cornuta, var. geniculata Calvet, 1902, "Bry. mar. Cette", Trav. Inst. Zool. Montpellier, 



(2) Mém. n, p. 71. 



(Mus. Zool., Cambridge.) Torres Straits, 88, A. C. Haddon Coll., Reg. Feb. 24, 1898 (now 

 transferred to the British Museum). 



106 



