MARINE ZOOLOGY 



17. Cellaria sinuosa, Hassal. 



A much stouter species than the last, and 

 consequently there are a greater number of 

 zooecia in the circumference. The upper 

 margins of the zooecia are curved, not 

 straight as in C. fistu/osa, and the segments 

 of the stem are much longer. The colour 

 is a light buiF. From deep water ; rare. 

 Hastings. 



Flustrid^ 



18. Flustra foliacea, Linnaeus. 



Colonies forming long, flat, branching 

 expansions, of a horny consistence, and 

 with zocecia arranged in lines and covering 

 both surfaces. The zooecia are coffin- 

 shaped and carry two spines at either of 

 the upper corners. The whole face of the 

 zooecium is membraneous. Very common 

 upon shells, rock, etc. Hastings. 



1 9. Flustra papyracea, Ellis and Solander. 

 This species occurs in the form of rather 



close tufts or rosettes about 2 inches in 

 height. Zooecia oblong, with only one 

 spine at either upper corner. Colour buff ; 

 not uncommon. Hastings. 



Membraniporid^ 



20. Memhranipora lacroixii, Audouin. 

 Aperture of zooecia oval, margin more 



or less beaded. It occurs upon rocks and 

 stones at low tide, also upon shells, in three 

 forms, viz. one producing considerable and 

 uniform patches of stone ; secondly, it 

 forms dendritic, and rather radiating pat- 

 terns ; and, thirdly, there is a form with 

 spines around the apertures, and producing 

 colonies of a more or less close outline. 

 Common. Hastings. 



21. Memhranipora monostachys^ Busk. 

 Aperture of zooecium oval, not occupy- 

 ing the whole width ; generally with one 

 short and stout spine at the bottom, and 

 often one or more on either side in the 

 upper part ; occasionally there are none. 

 The form of the colony is characteristic 

 and might be expressed as erratically den- 

 dritic. Upon rock along the beach. Not 

 very common. Hastings. 



22. Memhranipora catenularia, Jameson. 

 Zooecia in single series, branches being 



given off at an open angle and uniting 

 with others, thus forming reticulated pat- 

 terns. The zooecia are pear-shaped with 

 oval and moderate sized apertures. Upon 

 old shell of Cardium norvegicum from deep 

 water. Rare. Hastings. 



23. Memhranipora piloia^ Linnsus. 

 Zooecia glassy, perforated, with oval 



aperture occupying the full width of 

 zooecium, and armed with spines of which 

 one at the bottom is very long and of a 

 horny nature. Very common upon almost 

 every object. 



Memhranipora pilosa var. dentata^ hav- 

 ing a short spine instead of a long one at 

 the bottom of the aperture, is also common. 

 Ranging from shore to deep water. Hast- 

 ings. 



24. Memhranipora memhranacea, Linnaeus. 

 Covering rock and weed at low tide. 



Zooecium coffin-shaped, brown, leathery, 

 wrinkled, with a long spine upon the upper 

 margin on either side, and occasionally one 

 between them. Common. Hastings. 



25. Memhranipora spiniferay Johnston.* 

 Hastings. 



26. Memhranipora dumerillii, Audouin. 

 Zooecia form pearly patches upon rocks 



and stones at low water, also upon shells. 

 They are oval to sub-triangular, with two 

 spines on either side of aperture ; in some 

 specimens the spines are abnormally long. 

 Common. Hastings. 



27. Memhranipora solidula. Alder and 



Hincks.* 

 Hastings. 



28. Memhranipora aurita, Hincks. 

 Forming patches upon stone at low tide. 



Zooecium ovately oblong ; margin finely 

 beaded, with a spine upon one side only, 

 below the aperture. Not uncommon. 

 Hastings. 



29. Memhranipora fiemingii, Busk. 

 Zooecium ovate, aperture sub-triangular 



and occupying rather more than half the 

 front area, the other portion forming a 

 calcareous wall. There are three spines 

 upon either side of the upper half of the 

 aperture. Upon scallop shells ; rather 

 rare. Hastings. 



30. Memhranipora rosse/ii, Audouin. 

 Zooecium coffin-shaped, margin strongly 



beaded, aperture sub-triangular and occupy- 

 ing barely half the length of the zooecium; 

 colonies forming patches upon rock and 

 shells. From moderately deep water; rather 

 rare. Hastings. 



31. Memhranipora savartii, Audouin. 

 Forming considerable patches upon old 



shells of oyster, Lutrarta, etc. The zocecia 



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