116 SIDNEY F. HARMEE. 



? C. eburnea (pars). — 



(9) Smitt.— PI. xvi, figs. 12a, I2b. 



On p. 135 of Smitt's paper it is explained that these figures repre- 

 sent young ovicells (of C. eburnea), without tubular apertures. 

 It may, however, be remarked that au ovicell, with the contents shown 

 in fig. 12i, would probably have had a well-developed tubular aper- 

 ture if it had really belonged to C. eburnea; and, further, that there 

 is evidence (see above, No. 16) that Smitt has worked at the ovicells 

 of C. aculeata. Ibid., table of formulae, Nos. 2, 3 (see explanation 

 of the formulae), and probably some of the later formulae. 

 P C. denticulata (pars). — 



(8) Busk.— PI. iii, figs. 1—6. 



Notice the spine in fig. 6. In the other figures, the character of 

 the branching and of the basal internodes, and the small number of the 

 pores appear to me to prove that this plate does not refer to C. 

 denticulata, and that it probably refers to C. aculeata. 



C. ramosa, n. sp. PI. XI, figs. 10, 11. 

 Zoarium erect, often of rather straggling habit; the 

 average height of well-grown colonies about | inch ; the 

 branches (in well-grown specimens) arranged in fan-shaped 

 systems, owing to the large number of branches given off by 

 the terminal internodes, and with little or no tendency to curve 

 inwards. Internodes often much flattened, of very variable 

 length ; often very long, and consisting of numerous zooecia ; in 

 this case often with a well-marked double curve, as in 

 C. denticulata (and, to a less extent, in other species 

 Branches developed in greater numbers than in any of the 

 other British species ; even in the lower parts of the colony the 

 internodes commonly bear two branches, while the terminal 

 internodes, and especially those which bear ovicells, may give 

 rise to as many as four or five branches, which do not neces- 

 sarily come off alternately on opposite sides of the stem. The 

 lowest branch of an internode very commonly comes off from 

 the second zooecium of one side ; if the lowest branch arises 

 from the first zooecium of the internode, the next branch is 

 usually given off by the third zooecium of the opposite side. 

 Joints yellow, or colourless near the growing-points, never 

 black. Basis rami long, usually reaching the aperture of the 



