A HISTORY OF SUSSEX 



Cellulariid^ 



5. Scrupocellarla scruposa^ Linnaeus. 

 Growing in little white branching tufts 



upon rock, etc. The branches consist of 

 two rows of alternating zooecia, both rows 

 facing in the same direction. The zooecia 

 are ovately tubular, but taper downwards 

 slightly, and the apertures are armed above 

 with three or four spines. Upon the outer 

 side of each zooecium is a prominent 

 avicularium with beak upturned. No oper- 

 culum. From moderate to deep water. 

 Common. Hastings. 



6. Scrupocellarla scrupea. Busk. 



Similar to the last species, but with a 

 non-foliated operculum, and with a flagel- 

 late chamber situated between and rather 

 behind the zooecia. Upon sponges, etc. 

 From moderate depth. Hastings. 



7. Scrupocellarla reptans, Linnaeus. 



A species of prostrate, straggling habit, 

 and of a dull bufF or grey colour. Around 

 the upper margin of the aperture there are 

 three or four spines, and guarding the open- 

 ing there is a foliated operculum. An 

 avicularium is situated sometimes in front, 

 and sometimes there is a smaller one be- 

 hind the spines upon the outer side. Not 

 uncommon upon Jlustra, etc. Hastings. 



BlCELLARIID^ 



8. Bicellaria ciliata, Linnaeus. 



Colonies form plumose tufts of about 

 I inch in height, of a dull grey colour, 

 and hang pendent, like little tassels, upon 

 the sides of the rocks, at low water. The 

 stem and branches consist of biserial, alter- 

 nating, glassy zocecia, with many and long 

 spines around the apertures, below and 

 rather on the outer sides of which is situ- 

 ated a highly formed avicularium. The 

 zoarium is a very beautiful object under the 

 microscope. Common. Hastings. 



9. Bugula avicularia, Linnaeus. 



Stem about 2 inches in height, giving 

 off branches forming a delicate and beauti- 

 ful spiral. The zooecia are biserial and 

 have a spine at the outer and upper corner, 

 but only a very rudimentary one at the 

 inner corner. The avicularia are longer 

 than in B. turhinata^ but not so prolonged 

 as in Hincks' figures, and are placed mid- 

 way down the aperture. Not uncommon 

 upon rocks at low tide. Hastings. 



10. Bugula turbinata, Alder. 



Growth very much resembling the above 



species, but there are from two to five zooecia 

 abreast in a division, with a large spine at 

 each of the upper corners of the aperture, 

 and the aperture extends to the zooecium 

 below. The avicularia are shorter and 

 wider than in B. avicularia and are placed 

 just below the spines. Washed ashore. 

 Hastings. 



1 1 . Bugula Jiaiellata, Thompson. 



A short, brown, truncate-looking growth. 

 In some parts the zooecia number seven in 

 a row. There are two spines at each of 

 the upper corners of the zocecia, and often 

 there is an avicularium half way down the 

 side of the aperture. Common upon 

 Flustra foliacea. Hastings. 



12. Bugula calathus, Norman. 



This species resembles very closely B. 

 JtahellatOy but the habit is more compact 

 and shorter. There are five or more 

 zooecia in a row, and in many cases three, 

 but generally two spines in each of the 

 upper corners. Hincks calls attention to 

 the difference in colour between this 

 species and the last. His observations hold 

 good as regards the Hastings specimens, 

 they being of a very pale buff colour. 

 Washed ashore. Hastings. 



13. Bugula plumosa, VaWas,.* 

 Not uncommon. Hastings. 



14. Beania mirabilis, Johnson. 



A minute and delicate species creeping 

 over rock, etc. The zooecia are somewhat 

 spoon-shaped, laterally compressed, with 

 numerous spines around the margin, and 

 connected together by prolongations from 

 the preceding zooecia. Common upon 

 rock from the Diamond Ground. Hast- 

 ings. 



NoTAMIIDil 



15. Notamia bursar ia, Linnaeus. 



This exquisite little species throws up 

 plume-like stems, much curled, and branch- 

 ing. The zooecia are arranged in biserial 

 and opposite order. Above each of these 

 there projects from the stem a pedunculated 

 avicularium. Upon weed ; rather rare. 

 Hastings. 



CELLARIIDiT 



16. Cellaria fistulosa, L'\nn?e\is. 



Zooecia lozenge-shaped, arranged around 

 a branching, jointed axis. The zoarium is 

 white, and often occurs in dense bush-like 

 masses. From moderate to deep water ; 

 rather common. Hastings. 



86 



