30 ME. A. W. WATERS ON THE MARINE 



which became agglomerated. At first it was thought to be C. eburnea, and 

 probably the variety laxa, Busk. 



The lower branches usually start from below the aperture of the first 

 zooecium — that is, from the side of the first zooecium, — while in older parts the 

 new branch arises above the aperture of the first zooecium. In C. eburnea, 

 Hincks, there is some irregularity as to the branches starting from the first or 

 second zooecium, though it is most frequently from the first. 



In C. vincentensis there are usually 7 zooecia in an internode, the zocecial 

 aperture is 0'05-0 - 06 mm., the ooeciopore is O03 mm. without any funnel; 

 the branches are about 012 mm. wide, the distance from zooecium to zooecium 

 is about 0"26 mm., the base of a new branch is about O07 mm., and the joints 

 are light. The basis rami differs from that of C. eburnea in being longer, 

 sometimes reaching to the next zooecium, or it may stop a little short of 

 this, whereas generally the basis rami in eburnea is short with what I should 

 call the graft character. A 'Challenger' specimen of C. eburnea, var. laxa, in 

 the British Museum from the Busk collection has a large, long, adnateovicell 

 much raised at the distal end with the ooeciostome contracted, so that it is 

 much wider than deep as in the C. eburneo-denticulata figured by me * from 

 West Greenland, and on this account the present form is not placed under laxa. 



Harmer t, with a query, places C. eburnea, var. laxa, as a synonjm of 

 C. kerguelensis, Busk, but the specimen alluded to in the British Museum, 

 with the attached ovicell, proves that it is not the C. kerguelensis, which 

 Harmer figures with a free ovicell, having a tubular ooeciostome on the dorsal 

 surface. 



A new name is given with considerable hesitation to the present Cape 

 Verde specimens. 



C. vincentensis has about 12 pores in each square 0"1 mm., C. eburnea and 

 C. fistulosa have fewer, C. ramosa about 5. 



Tubulipora pulchra, MacGillivray, var. nov. (Plate 3. figs. 8, 9.) 

 Tubulipora pulchra, MacG., " Descr. of new or little-known Polyzoa," pt. vii. Trans. & 



Proc. Pt. Soe. Vict. vol. xxi. (1S85) p. 95, pi. 2. fig. 1 : Robertson, "Cyclost. Bry.," Univ. 



of California, Pub. Zool. vol. vi. (1910) p 250, pi. 23. figs. 32-35. 



Tubulipora fimbria, var. pulchra, Waters, Ann. Mag. Nat. Hist. ser. 5, vol. xx. (1887 



p. 258, pi. 7. figs. 1-3. 



The Cape Verde Islands specimens have the zooecial tube much larger 

 (014 mm.) than those from Port Jackson, Australia (07 mm.), and it may 

 be necessary to consider them as a variety. Apparently the specimens 

 examined by Dr. Alice Robertson are coarser than those from Australia, but 

 not so large as the present form. 



* Ann. Mag. Nat. Hist. ser. 8, vol. xviii. (1916) pi. 16. figs. 4, 5. 



t "Polyzoa of the 'Siboga' Expedition," Ent, Ctenost. & Cyclost. p. 105 (1915). 



