BRYOZOA OF THE CAPE VERDE ISLANDS, 29 



queried specimens may have influenced him to make a comparison with my 

 elonyata. 



The variety verdensis has comparatively short regular internodes, few 

 branches in the internodes where there is no ovicell, black joints, base of 

 branch about O08 mm., most of the bases rami are wedged in, while others 

 are longer ; though, as some of these characters may not be very important, 

 verdensis and elongata may be moderately closely allied. On the other hand, 

 the Cape Verde Islands specimens of verdensis are much like C. sinclairensis, 

 Busk. At any rate, verdensis has not the long straight internodes with one 

 branch to each, as in what Busk and I have considered to be elongata, M. Edw. 



Loc. Boa Vista, Gape Verde Islands, 5-20 fath., collected by Grassland. 



Crisia sigmoidea, Waters. 



Crista sigmoidea, Waters, Ann. Mag. Nat. Hist. ser. 8, vol. xviii. (1916) p. 476, pi. 16. 

 figs. 9, 10. 



Crisia denticulata, Waters, " Bry. of the Bay of Naples," Ann. Mag. Nat. Hist. ser. 5, 

 vol. iii. (1879) p. 269, pi. 23. fig. 2. 



There is one piece, from the Crossland Gape Verde collection, which I think 

 is this species. The zoarium is broad, with the ends of the zooecia free 

 projecting upwards, the ends of the zooecia are about 0'28 mm. apart, and 

 the zooecial apertures are about 0"06-0"07 mm. wide. The joints are light, 

 and the base of a branch is about O'l mm. wide, occurring after the second 

 or third zooecium on that side, with another branch on the other side a few 

 zooecia further up. Unfortunate^ there is no ovicell, and the C. sigmoidea and 

 C. conferta, Busk, are very similar, so that without an ovicell determination is 

 difficult, but the type-specimen of C. conferta is slightly wider than C. sig- 

 moidea and at the same time the basis rami is wider, being about 0'13 mm. 

 in conferta. The ovicells of the Mediterranean sigmoidea do not show any 

 tubular ooeciostome, whereas the funnel-shaped ooeciostome is very marked 

 in conferta. 



This differs from C. denticulata and the C. elongata, Harmer, in having 

 light joints, but the position of the branches is very similar to Harmer's 

 elongata. 



Loc. Naples, Rapallo, Villefranche-sur-Mer, Oran (Algiers). Gape Verde 

 Islands, collected by Crossland. 



Crisia vincentexsis, sp. nov. (Plate 3. figs. 2, 3.) 



This is a form which has been difficult to place, for although there are 

 several small specimens an ovicell was only found in one case, and of such an 

 unusual form as to raise the question as to whether it is abnormal. It is 

 broad throughout, as though two zooecia mighl have been forming ovicells 



