SCHIZOPORELLA LINEARIS. 251 



marks; South Devon; Ilfracombe, 8-10 fathoms; Corn- 

 wall, down to 60 fathoms (T. H.) : &c. Var. hastata : 

 South Devon; Guernsey (T. H.): Budleigh-Salterton, 

 very fine (Miss Jelly). 



GEOGRAPHICAL DISTRIBUTION. Roscoff (Joliet) : France, 

 S.W. (Fischer) : Mediterranean (M' Andrew) : Adriatic 

 (Heller) : Algiers, normal and var. mamillata (J. Y. J.) : 

 Scandinavia, on Ascidians and Algae, 10-20 fathoms 

 (Smitt) : Norway, from 200-300 fathoms, on Oculina 

 (Baron Uggla) : Bohuslan (Loven) : South Labrador, rare 

 (Packard). 



liANGE IN TIME. Austro- Hungarian Miocene deposits 

 (Reuss) : Pliocene beds, Calabria (Manzoni) . 



I have already referred incidentally to the curious rudi- 

 mentary cells bearing ooecia, which are developed abun- 

 dantly on this species. They occur on the front surface 

 of the ordinary zocecium, which they almost completely 

 cover. The upper portion presents the usual appearance 

 of the ovicell ; it is closely united to the wall of the cell, 

 ample, well rounded above, but contracted slightly towards 

 the arched opening in front, which is closed by a horn- 

 coloured operculum. Below the opening there is a semi- 

 circular calcareous wall, continuous with the sides of the 

 ovicell ; and between the top of this wall and the operculum 

 there is a space, which is usually filled in by a transparent 

 membrane. The area inclosed by the semicircular wall is 

 evidently an aborted cell. The whole structure consists 

 of an ooecium attached to the mere rudiment of a cell. 



These singular bodies are in most cases distributed 

 thickly over the surface of the zoarium, and occur indif- 

 ferently on cells which are furnished with the ordinary 

 ovicell and on those which are destitute of it. Occa- 

 sionally they are placed transversely. 



