BRYOZOA OF THE CAPE VERDE ISLANDS. 39 



British and North French coasts ; and Dr. Alice Robertson reports it from 

 California, but it has not been mentioned from the Atlantic or from the 

 Mediterranean. Hincks describes a form from Victoria as var. cylindrical,, 

 but judging from my specimens from Port Phillip I should certainly not 

 call it a variety of F. hispida, for it has spines regularly all round the 

 zooecium, which is not the case in the northern form, which also is a larger 

 and more solid form. 



Flustrella hispida has 23-27 tentacles. 



Harmer* considers that the geuus Flustrella should be retaiued. 



Loc. Northern Seas; California; Boa Vista, Cape Verde Islands, 5-20 

 fath., collected by Crossland. 



Amathia tortuosa, Tenison Woods (non Busk). 



For synonyms see Waters, " Mar. Biol, of the Sudanese Red Sea, Bryozoa," pt. ii. p .243, 

 pi. 24. fig. 5 (1910). 



Dr. Harmer | has doubted the determination of this species from the 

 Sudan, perhaps partly through my figures being merely outlines. I gave 

 three very small figures of forms believed to be three species, so that a 

 comparison could be made of the size and position, but merely to show 

 these characters in question. 



In Amathia the lower parts of the zooecia are usually connate, whereas the 

 upper part may be more or less free, varying in appearance according to the 

 condition of the specimen and of the mount. My figure 5 of A. tortuosa 

 (also figured by MacGillivray) is depicted looking down on the top of the zooecia 

 when the upper part is seen separated, giving naturally a short appearance, 

 but it was advisable to show it in this position. The length of the zooecia 

 from Cape Verde Island are about 04 mm., with the lower half of the 

 zooecia connate and the upper free. With regard to my figure of A. distans, 

 Busk, the scale was too small for it to be possible to show the ends in detail, 

 but it will be seen that in two or three cases projecting zooecia are shown, 

 and this was more distinct in the original drawings, for though taken from 

 actual specimens the size prevented their being more than diagrammatic in 

 most respects ; the length of the zooecia is relatively the same as figured by 

 T. Woods t, and surely if he had been speaking of the length of the zooecia 

 he would have said the length of the cells and not of "the pair- of cells," 

 and he meant the length of the group of the pair of cells. This unfortu- 

 nate sentence of T. Woods has misled several authors, but the figure does 

 not show long cells. My determination of the Sudan and Zanzibar 



* Polyzoa of the ' Siboga ' Expedition, p. 10 (1915). 



t Polyzoa of the ' Siboga' Expedition, Ent., Cteno?. & Cyclos. p. 68 (1916). 

 X "On the Genus Amathia," Trans. Proc. Roy. Soo. Victoria, vol. xvi. (1879) p. !i0, 

 fig. 6. 



