BRYOZOA OF THE CAPE VERDE ISLANDS. 41 



Amathia Vidovici (Heller), Waters. 



Amathia Vidovici, Waters, " Marine Fauna of Brit. East Africa and Zanzibar," Cyclos, 

 Ctenos. & Endoprocta, Proc. Zool. Soc. London, 1914, p. 848, pi. 4. tigs. 1, 2, which see 

 for synonyms. 



This is growing on the same seaweed as A. tortuosa, T. Woods. There 

 are usually about 8-9 pairs of zooecia (about - 4 mm. long) in a short spiral 

 near the joint, with the lower part connate, the upper part free, as in 

 A. tortuosa; and this is the rule in A. Vidovici from other places, but a 

 specimen from Genoa has the zocecia more free — in fact, some of the zooecia 

 near the ends of the branches are quite free. From the stem there are a 

 few radicles with digitiform processes. The stem is about ()"14 mm. in 

 diameter, and there is a certain amount of variation in the thickness of the 

 stems, but the piece measured from Zanzibar must have been abnormally 

 compressed, as most are approximately the same as the present. I find that 

 the piece sent to me by Joliet as Serialaria semiconvoluta, from Roscoff, has 

 biserial zooecia arranged iu a spiral which is longer than that of Vidovici, 

 being somewhat like A. tortuosa, and the zooecia are much separated, so that 

 many are quite free, which led me to think it was a modified form of 

 A. Vidovici, but there is a little uncertainty as to what it should be called. 

 We have seen that A. tortuosa, Woods, A. distans, Busk, and A. Vidovici 

 are very closely related. I have a sketch of an Amathia iu the British 

 Museum, from the iEgean Sea, named Serialaria lend'ujera, 91. 71.4378, 

 which seems to be A. Vidovici. 



Loc. Mediterranean ; Bermuda (Chall.) ; Brit. East Africa ; N.E. Coast, 

 United States ; Cape Verde Islands, collected by Crossland. 



Zoobotryon pellucidum, Ehrenberg. 



For synonyms and localities see Waters " Bry. from Zanzibar," Proc. Zool. Soc. 1914 

 p. 849 ; and Journ. Linn. Soc, Zool. vol. xxxi. (1910) p. 243, pi. 24. figs. 12, 15. 



The specimens from Boa Vista, Cape Verde Islands, correspond closely 

 with those from Naples and the Bed Sea. 



As previously said, I think that Zoobotryon and Boioerbankia will have to 

 be united. Harmer does not agree, as he thinks the zoarial characters are 

 sufficient to warrant the separation, but the only difference is whether the 

 branching is usually with two new branches or three, whereas in a closely 

 allied genus, Amathia, there are considerably greater differences, without 

 new genera being made. For example, A. Wilsoni, Kirkpatrick, an un- 

 doubted Amathia, has also three branches at a joint. 



Bowerbankia pustulosa [Ellis $■ Sol.) Hinchs, var. alternata, var. nov. 



Specimens from Boa Vista, growing on Zoobotryon •pellucidum, Ehr., as 

 well as on the supporting seaweed, and others from St. Vincent Harbour, 



