The Bryozoa of the Tortugas Islands, Florida. 191 



The colony appears to be very loosely attached to the Cupularia by 

 processes from the dorsal sides of the cells. The species occurred at various 

 depths— in fact, wherever this species of Cupularia was found, at from 10 

 to 22 fathoms, but was found nowhere else. Usually only a single colony 

 was found on one Cupularia, but occasionally on a large specimen two or 

 three colonies would occur. 



Genus Synnotum Hincks, 1886. 



Synnotum aviculare (Pieper). 



PiEPER, 1881, p. 43 (Gemmellaria avicularis). — Hincks, 1886, p. 2S7 — Robertson 

 1905, p. 286. *^ -" ' 



This well-known species is abundant about the islands, growing espe- 

 cially on shells and sponges at a depth of 8 to 10 fathoms. It has not before 

 been recorded from North America, except on the Pacific coast, where Miss 

 Robertson found it at San Pedro and San Diego, Southern California. 

 Hincks (1886) described the sessile avicularia as alternating on Adriatic 

 specimens. Robertson states that they appear on every pair in specimens 

 from California. In the Florida material in my collection the alternate 

 condition is the rule, but occasionally sessile avicularia appear on successive 

 pairs of zocecia. Besides the above localities the species is now known from 

 the Mediterranean and Red Seas, South Africa, Australia, and the Andaman 

 Islands. 



Genus Nellia Busk, 1852. 

 Nellia oculata Busk. 



Busk, 1852, p. 18.— Lamarck, 1816, p. 135 (Cellaria teneUa).—SmrT, 1873, p. 3,— 

 Jelly, 1889, p. 94 {Farcimia ienella, references and synonymy). — Waters, 

 19091 P- 167 {Farcimia oculata). — Levinsen, 1909, p. 120 {Nellia tenella). 



Abundant at 10 to 18 fathoms, frequently attached to sponges or 

 occasionally to shells. The usual height of the colonies is 0.5 to i inch. 

 One large, branched colony was taken, measuring 4 inches across and of 

 equal height. Smitt recorded the species from 13 to 138 fathoms. It has 

 also been recorded from Texas and St. Thomas, West Indies (Levinsen), 

 and is widely distributed in the Atlantic, Pacific, and Indian Oceans down 

 to a depth of 550 fathoms. 



Waters (1909, p. 167) objects to the use of Lamarck's name tenella on 

 the ground that the short description given by Lamarck is not diagnostic 

 and "might be applied to several species or even genera." 



Genus Scrupocellaria van Beneden, 1844. 



Scrupocellaria cornigera (Pourtales). 



Pourtales, 1867, p. Ill {Cauda cornigera). — Smitt, 1872, p. 14 {Cellularia cornigera)..— 

 Jelly, 1889, p. 61 {Cellularia cornigera). 



One small specimen of this species was taken at 10 fathoms and several 



others at 15 fathoms. The radical fibers are characteristically armed with 



stout, retrorse spines, as figured by Smitt. This alone is not sufficient for 



determining the species, as Busk has noticed serrate radicals in S. ferox 



