Mr. S. V. Wood^s Catalogue of the Zoojihytes from the Cray. 17 



Cor. Crag. Red Crag. Recent. 



5. Eschara foliacea, Johnston {Brit. Zoopli. p. 297. t. 40). 



Sutton. I I Britain. 



6. — porosa .'' M. Edw. An. des Sci. Nat. vol. vi. pi. 11. f. 7. 



Sudbourn. | | 



The cells of this are found open. 



1 . Ulidium Charlesworthii (Melicertina Charlesworthii, Ehrenh. 

 Melicerita Charlesworthii, M. Edw. An. des Sci. Nat. vol. vi. 

 pi. 12. f. 19). 



Sutton. I I 



Melicerta has long been used as a genus in the class Crustacea, 

 Melicertum in Acalepha. Melicerita as stated by Ehrenberg is 

 not correct. Melicertina is objectionable, as the ina is generally 

 used for a family termination. I therefore propose the name 

 Ulidium [ovkihiov, a scar), from its close connexion with Eschara. 



1. Cellaria fistulosa (Tubularia fistulosa, Linn. Cellaria salicornia, 



Lamx. Exp. Meth. des Polyp, p. 5. Farcimia fistulosa, Flem, 

 Brit. An. p. 534). 



Sutton. I Walton Naze. ] Britain. 

 Articulations cylindrical ; cells elongato-rhomboidal, immersed ; 

 sides elevated, sharp ; larger opening transversely lunate, unarmed ; 

 smaller opening above transverse, semilunate; surface of cells porous. 



The cells occasionally vary in shape upon different articulations 

 of the same specimen, like those represented by Ellis, Coral, pi. 23. 

 D., some being of a subhexahedi'al form with nearly parallel sides. 

 The lower part of the larger opening (the operculum) is elevated 

 in the centre, projecting outwards ; this in the fossil is occasionally 

 separated into denticulations : the smaller opening above is gene- 

 rally transverse, sometimes lunate, and often orbicular in worn 

 specimens. In those most perfect the smaller opening is a nar- 

 row transverse fissure close to the partition, as may be seen in 

 dead specimens of the recent species, and is probably accidental 

 in all. Fragments of this fossil are abundant, but the articulations 

 are generally separated. 



2. — crassa, n. s. 



Sutton. I Sutton. | 

 Articulations ovate ; cells rhomljoidal, immersed, plain ; sides ele- 

 vated, sharp; aperture transverse, sublunate. 



The cells in some are hexagonal, and the aperture appears as 

 if armed with four teeth, two proceeding from the upper edge 

 pointing downwards, and two from the lower, more obtuse, point- 

 ing upwards ; these are probably produced from decomposition : 

 the smaller opening above the mouth varies in shape, being some- 

 times orbicular, sometimes lunate, and is also in all probability 

 accidental. 



Ann. ^ Mag. N. Hist. Vol. xiii. C 



