The Bryozoa of the Tortugas Islands, Florida. 189 



bugula) intermediate between Bugula and Bicellaria on account of its articulated spines or 

 vibraculum, and related to Stirparia by its jointed stem. It may be named Bugula (Cauli- 

 bugula) armata. Its zooecia are oblong and biserial, alternate. The pedicellariae are on 

 short pedicels, large, lateral not numerous. 



Verrill in the above description overlooked some interesting and im- 

 portant points. He makes no mention of radical fibers which originate 

 at the lower ends of the internodes of the stalks. He does not mention the 

 Goecium, which is subglobose with a rather wide opening directed toward the 

 zooecial axis. The ooecium is attached by a narrow stalk to the outer edge 

 of the zooecial aperture near the distal extremity and is turned sidewise at a 

 right angle to the zooecial axis. 



The avicularia ("pedicellariae" of Verrill) show a peculiar distribution. 

 The basal zooecium bears no avicularium, but the zooecia immediately above 

 have the avicularia situated on the side about half-way along the aperture. 

 The next few cells in order have the avicularium farther and farther removed 

 toward the distal end, and in all zooecia farther out on the branches the 

 avicularium is on the distal outer edge of the aperture. This is a feature 

 which I have never seen exhibited by any bryozoa. There are one or two 

 ong spines, jointed at the base, on the distal end of the zooecium (sometimes 

 wanting). Verrill errs in calling these "vibracula," a term which should 

 be applied only to modified avicularia with elongate mandibles. The basal 

 zooecium of the main branches arising from the stem differs from the others 

 in having usually 6 spines surrounding the aperture, 4 on the outer, 2 on the 

 inner edge, a feature exhibited by Stirparia occidentalis (Robertson, 1905, 

 pi. XIII, fig. 73). 



I can see no reason for erecting a new genus for this species. The 

 jointed stalks, swollen at the nodes, seem sufficient to place it in Stirparia 

 if that name were to be maintained for the Bugulas with jointed stalk. 

 The jointed spines do not necessarily relate the species to Bicellaria, as this 

 feature is present in some species of Bugula and Stirparia. 



Taken on a number of occasions at 8 to 10 fathoms, growing in a sprawl- 

 ing fashion over sponges. Found also on the legs of spider crabs at 10 to 

 18 fathoms, and dredged on a bottom of coral mud at a depth of 18 fathoms. 



Genus Beania Johnston, 1838. 

 Beania mirabilis Johnston. 



Johnston, 1847, p. 372.— Jelly, 1889, p. 17, for further reference.— Robertson, 

 1905. P- 276. 



Several fragments of colonies on the legs of a crab {Hyas sp.) taken at 

 18 fathoms. This striking and well-known species has not before been 

 noticed on the American side of the Atlantic. 



Beania intermedia Hincks. 



HiNCKS, i88ia, p. 133 {Diachoris intermedia).— Waters, 1906, p. 15; 1909, p. I37. 

 At 5, 10, and 15 fathoms, sprawling over hydroids and other bryozoa, 

 and on shells. Very small colonies consisting of only a few cells. The 



