8 MR. A. W. WATERS ON THE MARINE 



similar scuta. There are about seven zocecia in an internode. There is no 

 separable operculum, the ovicell is perforate, the radicles are serrate, and 

 the smooth vibracular setae are about three times the length of a zocecium. 

 hoc. Boa Vista, Cape Verde Islands, 20 lath., collected by Crossland. 



Beania hirtissima, Heller. (Plate 1. fig. 2.) 



Diachoris hirtissima, Heller, "Die Bryozoen des Adriat. Meeres," Verhand. der k.k. 

 zool.-bot. Gesellsch. Wien. vol. xvii. (1867) p. 9-1, pi. 1. figs. 6, 7 ; Busk, Rep. of the Voyage 

 of H. M.S. ' Challenger,' vol. x. Polyzoa, p. 61 (1884). 



Chaunosia hirtissima, Busk, Q. Journ. Micr. Sc. n. s. vol. vii. (1867) p. 241, pi. 36. 

 figs. 12-14. 



Beania hirtissima, Waters, " On the Use of the Avicularian Mandibles in determination 

 of the Cheil. Bry.," Trans. Micr. Soc. ser. 2, vol. v. (1885) pi. 14. fig. 5 ; "Bry. from 

 Rapallo, &c.," Journ. Linn. Soc, Zool. vol.xxvi. (1896) p. 17; " Bry. from Madeira," Journ. 

 R. Micr. Soc. 1899, p. 15 ; Calvet, " Bry. Mar. de la Reg. de Cette," Trav. Inst, de Zool. 

 de l'Univ. de Montpellier, ser. 2, Mem. 11, p. 24 (1902) ; Exped. Sc. du ' Travailleur ' et du 

 'Talisman,' Bryozoaires, vol. viii. (1907) p. 392; Norman, "Polyzoa of Madeira," Journ. 

 Linn. Soc, Zool. vol. xxx. (1909) p. 286. 



In the specimens from the (Jape Verde Islands there are no radicle-tubes, 

 and none seem to occur in the typical form of this species from other localities, 

 so far as examination has gone, but there are, in these Cape Verde specimens, 

 delicate spines which sometimes are entire, but more often they bifurcate 

 near the base, and usually there are two such spines on the dorsal surface of 

 each zocecium. Busk, in describing his Chaunosia the same year as Heller 

 with the same specific name, refers to the bi-trifureate dorsal spines. The 

 zoarium of Busk's Chaunosia is like the form of cylindrical, of Hincks. In 

 looking carefully through some specimens from Naples and Rapallo a few 

 such spines, similarly bifurcating, were found, but only in isolated cases, 

 whereas they are very numerous in the Cape Verde specimens, which in most 

 respects correspond fairly closely with the Mediterranean specimens. On the 

 anterior border there are about nine delicate spines on each side, while further 

 away from the border, with no great regularity, there are a number of much 

 stouter spines. Round the distal part of the aperture there are usually 

 seven fairly stout spines with other spines nearer to the dorsal surface. 



The variet}' robust a, Hincks, which I think might well be separated as a 

 species, has long thin dorsal tubes or radicles ; B. conferta, MacG., has 

 numerous long dorsal spines ; B. spinigera, MacG., has no dorsal spine or 

 tube; B. elongata, Hincks, has a small dorsal tube near the distal end; 

 B. magellanica, Busk, has a wide radicle-tube near the distal end, thus 

 showing the value of the dorsal surface in determination. 



Loc. Adriatic, Naples, Capri, Rapallo, Villefranche-sur-Mer (Waters), 

 Ajaccio, [Calvet); Madeira ( Waters 8f Norman) ; New Zealand (var. robusta); 

 St. Vincent, Cape Verde Islands (Chall.); St. Vincent Harbour, Cape Verde 

 Islands, 10 fath., collected by Crossland. 



