The Bryozoa of the Tortugas Islands , Florida. 195 



Recorded by Smitt for 29 fathoms and also in 7 fathoms off the mouth of 

 the Cape Fear River. Smitt regarded C. johnsoni Busk (syn. C. dotna 

 d'Orbigny) as a highly calcified form of C. lowei {umbellata) , but later inves- 

 tigations do not support this view. 



Verrill (1, c.) recorded the species with doubt from one worn specimen 

 taken at Fort Macon, near Beaufort, North Carolina. As the writer has taken 

 specimens at the same locality, Verrill's record may be considered good. 



Genus Cribrilina Gray, 1848. 

 Cribrilina floridana (Smitt). 



Smitt, 1873, p. 23 (Cribrilina figularis and local variety floridana). — Jelly, 1879, 

 p. 66 (calls attention to fact that C. figularis of Smitt is not Johnston's species, 

 and lists C. floridana as a distinct species). 



A number of small colonies of this species taken at 5 to 15 fathoms on 

 shells. Smitt recorded it from 29 to 42 fathoms. It is not known to occur 

 outside of the Florida region. 



No ooecia nor avicularia are developed on my specimens. The posterior 

 margin of the orifice is straight, and the orifice is completely filled by the 

 semicircular operculum, which is well chitinized and of a brownish color. 

 There are two short, stout oral spines and in young zooecia there is fre- 

 quently a third median spine. 



There is a possibility that this species may belong to the genus Puellina 

 of Jullien as amended by Levinsen (1909, p. 159), but the immature colonies, 

 in my collection seem rather to belong to Cribrilina in the strict sense. 



Genus Arachnopusia Jullien, 1888. 

 Arachnopusia monoceros (Busk). 



Busk, 1854, P- 72 (.Lepralia monoceros). — Jelly, 1889, p. 67, synonymy. — Levinsen"^ 

 1909, p. 160 (discusses relationship and adopts Jullien's genus Arachnopusia. 

 with emendations). 



A single specimen of this widely distributed species was taken at 5. 



fathoms, incrusting a shell. The colony was small, measuring only 0.125. 



inch across, but the zooecia ranged in development all the way from the- 



ancestrula to adults with ovicells and from these to marginal individuals 



in various conditions of calcification. The species has not before been 



taken in North American waters. 



Genus Smittipora Jullien, 1881. 

 Smittlpora abyssicola (Smitt). 



Smitt, 1873, p. 6 (Vincularia abyssicola). — Jelly, 1889, p. 253, synonymy and refer- 

 ences. — HiNCKS, 1881, p. 155; 1887, pp. 161 and 164. 



Found at low water and down to 15 fathoms on shells, bases of gorgonias, 

 etc. Smitt recorded two specimens taken by Pourtales, one at 68 fathoms, 

 the other at 450 fathoms. The bathymetrical range of the species, from low 

 water down to nearly 0.5 mile, is worthy of note. 



Only the incrusting phase was seen, with no evidence of the erect stems 

 described and figured by Smitt in one colony. The family relations of this 



