94 SIDNEY P. HARMER. 



are indicated by the following list of measurements of the 

 transverse diameter : 



The average of this series of measurements is 360 ju. 



T. phalangea, Couch (figs. 5, 6). 



Tubulipora phalange a, Couch (5, p. 106, pi. xix, fig. 7 [figure bad]). 



Johnston (20, p. 273 [part], pi. xlvi, figs. 1—4). Busk (2, p. 25, 



pi. xxiii, fig. 2). 

 Tubulipora flabellaris, Hincks (18, p. 446, pi. Ixiv, figs. 1 — 3). 

 Tubulipora verrucaria and T, verrucosa, Milne Edwards (29, pp. 



337, 328, 323, pi. xii, fig. 1). 



Zoarium entirely adnate, variously lobed, sometimes consisting of a series 

 of divaricated lobes, sometimes almost circular in outline, and then reaching a 

 maximum diameter of at least 15 mm. In stunted specimens the terminal 

 membrane may not divide, but gives rise to a single small fertile lobe, the 

 whole colony being pear-shaped. Zooecia serially connate, the series alternate 

 near the base of elongated branches, but becoming radial in fertile lobes. 

 The series are commonly resolved above into their component elements, the 

 zooecia having a longer or shorter free cylindrical portion ; but they may 

 remain entirely connate to their ends. Zooecia narrow and long compared 

 with those of most other species. Ooeciostome (fig. 5) about as large, at its 

 widest point, as an orifice, averaging 150 /i in diameter, the tube bent com- 

 pletely round, so that the ooeciopore (fig. 6), which averages only 120 /* in its 

 longer diameter, looks down on to the roof of the ovicell, and can rarely be 

 seen without dissection of the colony. Tlie tube of the ooeciostome is adnate 

 to a series of zooecia, and its upper exposed surface is convex. The primary 

 zooecium diverges from the plane of attachment to a greater extent than in 

 most species, and the proximal part of the colony is usually rather deep and 

 narrow. 



Common (in Devonshire) on red seaweeds, shells, and stones from about 

 three fathoms to moderately deep water. I have seen one specimen from the 

 Outer Hebrides. 



The reasons for maintaining that this species is distinct 



