BRYOZOA OF THE CAPE VERDE ISLANDS. 23 



widely open in front, and at one side of the zooecia near the aperture there 

 is a small acute avicularium ; in a few cases there is one on each side, with 

 occasionally an avicularium in other positions. Generally there is no mucro 

 to the ovicells, though in one specimen many of the ovicells are mucronate, 

 or even might be said to support a long spinous process, and the frontal 

 projection, as figured by Calvet, has been seen. There was no ovicell to the 

 specimen from Madeira. The surface of the zooecia and of the ovicell is finely 

 granular, and there are a few large pores round the border of the zooecia. 



The aperture measures about 0"08 mm. 



Loc. Florida, 9 fath. (Smitt) ; Madeira ; He Brancot, Cape Verde Is., 

 20-25 met. (Calvet) : St. Vincent Harbour, Cape Verde Islands, 10 fath., 

 collected by Grossland. 



Holoporella aperta (Hincks), Waters. 



For localities see Waters, "Marine Fauna of Brit. E. Africa," Proc. Zool. Soc. 

 1913, p. 522. 



There is only one small colony, growing on a piece of coal, so that no 

 preparation could be made, but there seems no doubt as to the identity. 



Loc. Singapore or Philippines ; Ceylon ; Indian Ocean ; Zanzibar and 

 Brit. E. Africa ; Cuba ; St. Vincent Harbour, Cape Verde Islands, 10 fath., 

 collected by Crossland. 



Microporella ciliata (Pallas), Harmer. 



For localities see Waters, " Marine Fauna of Brit. E. Africa," Proc. Zool. Soc. 1913, 

 p. 523, and for synonyms add: Lepralia ciliata, Barrois, Embryologie des Bryozoaires, 

 p. 119, pi. 7. figs. 4, 6, 7, 1-5, 19 (1877). 



Microporella ciliata, Harmer, " Morph. Cheil.," Q. Journ. Micr. Sc. vol. xlvi. (1902) p. 316 ; 

 Waters, "Mar. Biol. Sudanese Red Sea," Journ. Linn. Soc, Zool. vol. xxxi. (1915) p. 443; 

 Osburn, " Bry. of Woods Hole Region," Bull. Bur. of Fisheries, vol. xxx. (1912) 

 p. 233; Osburn, Sumner & Cole, "Biol. Survey of tbe Waters of Woods Hole," Bull. Bur. 

 of Fisheries, vol. xxxi. (1913) p. 601. 



Loc. Cosmopolitan ; Cape Verde Islands, collected by Crossland. 



Adeonella contorta (Michelin), Waters. (Plate 4. figs. 10-15.) 



Laminopora contorta, Mich. Magasin de Zoologie, 1842, pi. 3 ; Waters, " On some Recent 

 Bryozoa in d'Orbigny's Collection," Ann. Mag. Nat. Hist. ser. 7, vol. xv. (1905) p. 10. 



Schizoporella contorta, Calvet, Eiped. Sc. du ' Travailleur ' et du 'Talisman,' 

 Bryozoaires, vol. viii. (1907) p. 420. 



? Gemellipora arhuscula, Calvet, loc. cit. p. 426, pi. 27. figs. 16-19. 



Adeonella contorta, Waters, " A Structure in Adeonella {Laminopora) contorta, Mich. 

 . . . together with Remarks on Adeonidie," Ann. Mag. Nat. Hist. ser. 8, vol. ix. (1912) 

 p. 489, pis. 10 & 1J. 



A common character is frequent branching at right angles, often forming 

 but very short branches, as figured (fig. 15) from a colony, collected by f'ross- 

 land, from St. Vincent, Cape Verde Islands. In some specimens these branches 



