BRTOZOA OF THE CAPE VERDE ISLANDS. 31 



In the colonies from the Cape Verde Islands the young branches are 

 narrow with only a few zooecia and frequently anastomose, (hough ultimately 

 forming a wide spreading growth. They have evidently grown on a 

 calcareous seaweed. T. organizans, d'Orb., sent to me by Jullien from Cape 

 Horn, has similar attachments, and Harmer mentions them in T. plumosa, 

 W. Thomp. It is possible that the species under consideration should be 

 called T. organizans, d'Orb. 



Loc. Victoria (MaeGiUivray) , Port Jackson ( Waters) ; Southern California, 

 San Diego shore, 11-32 fath. (Hubertson) ; St. Vincent Harbour, Cape Verde 

 Islands, 10 fath., collected by Crossland. 



Tubulipora Lamourouxii (Audouin cy Savigny), Waters. (Plate 3. figs. 4, 

 5, 6, 10, 11.) 



Proboscina Lamourouxii, Aud., " Descrip. de l'Egypte," Hist. Nat. p. 230, pi. 6. tig. 5 

 (1826). 



This occurs as a narrow band, with very long zooecia on each side, showing 

 a certain amount of regularity as in Idmonea, or it may spread in opposite 

 directions with two oval subcolonies (figs, la & 10a), or even spread out in a 

 flabelliform manner, and in one of these the ovicell has a distinct purple 

 colour in the dry state, so that at first it was taken for T. liliacea (Pall.), 

 Harmer. 



The zooecia are very exceptionally small, having the aperture about 0'5 mm., 

 and the projecting portion of the zooecial tubes show no pores. The ovicell 

 is central, forming a raised inflation with a simple ooeciostome tube, about 

 0"03 mm. The dorsal surface is very characteristic, having raised ridges 

 curved from the median line, and along these ridges there is a row of small 

 pores for the attachment (fig. 5). 



No Tubulipora has been described with so small an ooeciostome tube, and 

 in all the cases referred to by Harmer, with the exception of T.fiabellaris, 

 Fabr.j the ooaciopore is larger than the zooecial orifice, whereas here it is 

 smaller. Harmer * says the ooeciostome in T. liliacea is larger than the 

 orifice of a zooecium, mentioning T. phalangea, Couch, as about the same size, 

 in T. aperta, Harmer, as larger than the zooecial orifice, in T. plumosa, "W . 

 Thomp., as also larger, while in T.flabellaris it is somewhat less than the diameter 

 of the zooecial orifice. Dr. A. Robertson t says that the ooeciostome in 

 T. occidentalis is smaller than the aperture of a zooecium. 



I met with a few cases of some very delicate tubes, three or four starting 

 from near the same centre, and these were taken at first for an unknown 

 form (PI. 3, fig. 7 juv.), but some young' forms of T. Lamourouxii, with 

 primary, convinced me that young forms with long erect tubes give much 



* "On the Development of Tubulipora," Quart. Journ. Micr. Sc. vol. xli. n. s. p. 91. 

 t "Cycl. Bry. of the West Coast of X. America," CJniv. of California, Pub. Zool. vol. vi. 

 (1910) p. 249, pi. 22. figs. 29-31, 



