109 



B. dissimilis (Busk). 



Carbasea dissimilis Busk, Catalogue of Marine Polyzoa, Part 1. 

 Cheilostomata pag. 51, PI. 50, figs. 4 — 7. 



— — Busk, Challenger, Zoology, Vol. X, Part I, 



pag. 56. 



Flustra dissimilis Waters, Journ. R. Micros. Soc. 1896, pag. 282. 



(PI. V, flg. 2 a-d). 



The zooecia elongated, quadrangularly tongue-shaped, with as a rule a much 

 narrower proximal half, of which a larger or smaller part is calcified. Three 

 pairs of spines may occur, of which frequently only a smaller number is devel- 

 oped. In colonies without ocecia only the first pair is generally present, but even 

 these may be lacking or rudimentary in many zooecia. In colonies with ocecia, 

 it is rather difficult to find this pair of spines from the surface of the colony, 

 as they are placed in a hollow on each side of the ooecium. The marginal 

 zocEcia which are longer than the others, are drawn out into a plump corner- 

 spine. The distal wall, which is furnished with two multiporous rosette-plates, 

 is much bent angularly, and has besides a distinct saddle-shaped cui've from the 

 front to the basal side (fig. 2 b, 2 c). Each lateral wall is furnished in its distal 

 half with two multiporous, strongly projecting rosette-plates. The basal surface 

 of the zooecia is coarsely striated transversely (flg. 2 b). 



The avicularia which are placed in the middle of the proximal, calcified 

 portion of the zooecia are attached by means of a rather wide proximal part 

 and the tips are turned in different directions. 



The ocecia are not as free as they are in Bagula, rather a large part of 

 their basal wall being firmly connected which the higher zocecium. They are 

 very large, furnished with an uncalcified ectoooecium, and the endoooecium besides 

 a distinct double striation also has a characteristic system of lines bounding 

 triangular or square apparently impressed meshes. 



Cornucopina nov. gen. 



Bicellaria p. p. 



(PI. IV, figs. 4 and 5). 



The zooecia widening from a long, tube-shaped proximal end obliquely up- 

 wards, funnel-shaped, with a ring-shaped constriction at a greater or less distance 

 from the distal wall. The ocecia, which are not placed between two zooecia in 

 the same longitudinal row but on the zooecial distal margin, which is directed 

 outwards from the middle of the colony, are surrounded by kenozocecia. In most 



