A HISTORY OF SUSSEX 



79. Cellepora ramulosa, Linnaeus. 

 Partially encases the stems of corallines. 



The zocecia are ovate to tubular, with a 

 stout prominence beneath the aperture but 

 not so vertical as in C. pumicosa, and with 

 a rather large avicularium at the base, and 

 upon the inner surface. Very common 

 from the coralline zone. Hastings. 



CYCLOBTOMATA 

 CRISIID/E 



80. Crisia cornuia, Linnaeus. 



Colonies forming erect, feather-like 

 growths upon seaweed and corallines. The 

 zocecia are tubular and curved, giving off 

 other zocecia from behind in single series. 

 Near the base of each zocecium there is a 

 horny joint ; and in many cases at the side, 

 and a little way below the aperture, there 

 occurs a long, tapering, curved spine also 

 having horny joints. Common from 

 moderately deep water. Hastings. 



A variety without spines, but not of 

 Hincks' geniculata type, also occurs some- 

 what rarely at Hastings. 



8 1. Crisia eburnea, Linnaeus. 



Of similar habit to the last species. The 

 zocecia are biserial and alternate with only 

 the ends free. Horny joints occur at 

 intervals along the stem and branches, but 

 always at the commencement of each 

 branch. The ocecia are pear-shaped, and 

 occupy the position of a zocecium. 



Crisia eburnea var. acu/eata, Hassall, with 

 a long jointed spine upon the off-side of the 

 aperture, also occurs, together with the 

 type, at Hastings, both being rather 

 common. 



82. Crisia denticulata, Lamarck. 



Much like the last species, but the zocecia 

 are more compact, not so elongated, aper- 

 tures not so distant, more opposite, and the 

 space between the two lines of zocecia is 

 greater ; the habit moreover is straighter. 

 Not very common. Hastings. 



TUBUUPORID.S: 



83. Stomatoporagranulata,M.i\ne-}Ldwa.rds.* 

 Hastings. 



84. Stomatopora major, Johnson. 



A species forming little straggling, 

 irregularly-branching colonies upon rock, 

 shells, etc. The zocecia are tubular and 

 number in the widest part as many as seven 

 abreast, the number increasing with the 

 length of the branch. The anterior ends 

 of the zocecia curve upwards and are free, 



showing a circular aperture. This occurs 

 either irregularly or, as is often the case, 

 in rows. Not uncommon from mode- 

 rately deep water. Hastings. 



85. Entolophora c/avata, Busk.* 

 Hastings. 



86. Tubulipora lobulata, Hassall. 



Encrusting shells, and forming somewhat 

 radiatingly lobed or branching colonies, of 

 a mauve colour. The tubular zocecia are 

 enlarged in the upper part, but contract 

 toward the aperture which is upturned and 

 free. The primary tubes multiply rapidly, 

 producing fan-like expansion of the lobes. 

 From deep water ; somewhat rare. Hast- 

 ings. 



87. Tubulipora flabellaris, Fabric ius. 

 Forming thin, flat, fan-like colonies upon 



scallop and other shells. Apertures slightly 

 enlarged and raised. The ocecia are seen 

 as oval expansions occupying the width of 

 three or four zocecia. From deep water ; 

 common. Hastings. 



88. Idmonea serpens, Linnaeus. 

 Exquisite, mauve or purple coloured 



colonies, upon corallines, flustra, etc. The 

 upturned anterior ends of the tubular zocecia 

 occur mainly in rows, upon either side of 

 a central parting. Colonies branch by 

 dividing. Not uncommon from moderately 

 deep water. Hastings. 



89. Diastopora patina, Lamarck. 

 Colonies forming little white discs of 



radiating tubular zocecia, upon stone, 

 corallines, etc. Occasionally colonies take 

 a concave form. Around a small area in 

 the centre the anterior ends of the zocecia 

 are erect and free, but outside remain 

 horizontal and do not rise above the common 

 matrix. Around the edge of the colony is 

 seen the white border of a fine calcareous 

 carpet, spread around for the due reception 

 of the dainty polypides. Rather common 

 from moderate to deep water. Hastings. 



90. Diastopora obelia, Johnston. 

 Encrusting shells, etc. The zocecia 



radiate from a centre, the apertures being 

 barely elevated above the colonial crust. 

 Lines forming the boundary between the 

 adjacent rows of zocecia, sinuous and 

 distinctly marked. Dotted here and there 

 between the apertures are small tubular 

 orifices, reproducing in miniature the zoce- 

 cial apertures. Very common from deep 

 water. Hastings. 



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