1907.] FROM THE CAPE VERDE ISLANDS. 503 



arise. Frequently the branches end in blind stolons. The 

 hydrothecaj are alternate and are borne at the distal ends of the 

 internodes on short pedicels marked by four or five annulations, 

 the base of the internode above that from which the pedicel 

 springs bearing a like number of rings. The calycles are short 

 and subtriangular, with a rather wide aperture and an almost 

 even, delicate rim. The whole colony is of delicate texture, the 

 perisarc being remarkably clear and hyaline. 



Gonosome not present. 



The form described above seems to be a young stage of 

 0. dichotoma Linn. Its much smaller size, its lack of horn- 

 colour, its branches arising from the side of a pedicel,^ and the 

 shorter subtriangvilar shape of its hydrothecse, are differences 

 insufficient to distinguish it specificalty from the older form. 



Loccdity. On the carapace of a small crab found crawling on 

 the bottom of a lighter : St. Vincent, Cape Yerde Islands ; 30th 

 July, 1904. 



GoNOTHYRiEA GRACILIS (SarS 1851). 



A few small specimens of this beautiful species occur growing 

 upon a fragment of calcareous material. The colonies are only 

 8 mm. in height, and differ from those described and figured by 

 Hincks (1868) in that the hydrothecse are somewhat less slender. 

 The remaining characters — the peculiar origin of the branches, 

 stuck on, one would almost think, as an afterthought, the gradual 

 tapering of the hydrotheca towards its base, the number of the 

 long pointed teeth, the ringing beneath the hydrotheca and at the 

 proximal end of the branches — agree with previous descriptions. 



Two long slender gonangia, with traces of a marginal collar as 

 in Hincks's figures, are present, one arising from the hydrorhiza, 

 the other from a peduncle. 



Loccdity. St. Yincent, Cape Yerde Islands, 10 fathoms ; 

 27th July, 1904. 



Oampanularia caliculata Hincks 1863. 



Typical examples of this species, with crenated pedicel, distal 

 spherical segment, and thick-walled, smooth-rimmed hydrothecae, 

 occur creeping on a seaweed. In our specimens the pedicels 

 average 0-5 mm. in length and are marked by about 10 crenations. 



The gonangia are absent. 



Locality. Porto Grande : creeping on seaweed in a shoi'e-pool. 



Campaxularia ptychocyathus Allman 1888. 



Numerous crowded, pedunculate hydrotheca^, and gonangia 

 springing from a creeping stolon have been found on a polyzoon. 

 The specimens agree closely with All man's description and figures, 

 especially characteristic being the delicate, frequently collapsed, 

 distal portion of the hydrotheca, which in our specimens bears 

 10 long teeth; the stem with a few rings (generally two) beneath 

 the hydrotheca and with several at the base ; the smooth 



