2o6 Papers from the Marine Biological Laboratory at Tortugas. 



back, occasionally behind the orifice. The zooecia are swollen about as in 

 unicornis, the punctures are similar to that species, and the form of the 

 orifice (with the sinus) might readily pass for that species. No oral spines 

 have been observed. In the very young stage a low, raised margin separates 

 the cells, but this is soon obscured by the secondary calcification. An 

 umbo is developed below the orifice, apparently only by secondary calci- 

 fication. In young colonies, where the vicarious avicularia are not yet 

 developed, this species may readily be mistaken for S. unicornis, but the 

 more anterior position and the curved form of the avicularia will serve to 

 distinguish it even in this condition. 



The ooecium differs from that of any Schizoporella with which I am 

 acquainted. It is comparatively small, very short (about two-thirds as 

 long as wide), very high and prominent, smooth, and imperforate. 



This well-marked species, which appears to be undescribed, was dredged 

 in 15 to 18 fathoms, incrusting shells and hard sponges, and, in one case, 

 forming an erect nodular growth nearly an inch in height and about half 

 an inch in diameter around some foreign matter as a center. The color 

 ranges from pure white to dark purplish-red. 



Fig. 17. — Schizoporella floridana n. sp. Details of young zooecium. 



Fig. 18. — The same. Highly calcified condition, showing ovicells and the long, independent avicularia 

 mounted on large, swollen cells. 



Schizoporella sanguinea (Norman). 



Norman, 1868, p. 222 (Hemeschara sanguinea). — Jelly, 1889, p. 233, synonymy. 

 Taken at 15 fathoms on a Vermetus shell; one colony with ovicells. 

 Reported by Smitt from Pourtales's collections at 60 fathoms, southwest 

 of Tortugas. 



