TUBULIPORIDyE. Ill 



starting point may be described as centrical. In Biastopora and Berenicea the growth is 

 also excentric, the former being distinguished from Tuhulipora by the discoid, margined 

 polyzoary in which the cells are immersed quite or nearly to the extremity, and the latter 

 by the polyzoarium forming a series of superimposed layers. Whilst its near ally Alccto 

 is mainly distinguished by the creeping, irregularly branched polyzoary, whose cells are 

 deeply immersed, and do not ascend in the same way as do those of Tubulipora. 



1. Tubulipora phalangea, Couch. PI. XVIII, fig. 6. 



Adnata, Integra, vel sublobata. Cellulis suberectis, seriatis, e linea longitudinali 

 media ad utrumque latus curvatis. 



Polyzoarium adnate, entire or sublobate, with a mesial division down each lobe ; tubes 

 slender, erect, serial. 



Tubulipora phalangea, Couch, Corn. Faun., iii, p. 106, pi. xix, fig. 7 ; Johnston, Brit. 

 Zooph., p. 273, pi. xlvi, figs. 1, 2. 

 — VERRUCARIA (?), M. Edwards. 



Phalangella phalangea. Gray. 

 Tubulipora palmata, S. Wood. 



Habitat. — C. Crag, S. Wood. {Becent) Britain. 



Mr. Couch's account of this species conveys so good an idea of it that it will be suffi- 

 cient to quote what he says of its distinction from T. serpens, the only other species with 

 which it could be confounded : " It is encrusting, circumscribed, oval, and the oval is 

 divided at the margins into from two to five lobes or festoons. Through the centre of 

 each lobe runs a fine or depression from which the tubes diverge on either side, as in 

 Tubulipora serpents. The tubes are comparatively long, and are not in contact with each 

 other as viewed from above. They are numerous, and arranged in perpendicular rows ; 

 each row is formed of a single series of tubes, which are in contact with each other. This 

 arrangement presents the appearance of a number of Pan's pipes placed perpendicularly, 

 the sets being separated from each other. Tubulipora serpens is a branched species, and 

 is generally parasitical on other corallines, while this is an encrusting species and never 

 branched." 



2. T. FLABELLARIS, (?) Fab. {sp.) PI. XVIII, fig. 3 ; PI. XX, fig. 9. 



Crustacea, flabelliformis, adnata ; ceUulis e puncto unico irregulariter radiantibus. 

 Polyzoarium crustaceous, fan-shaped, adnate ; tubes radiating irregularly from a single 

 point. 



