106 SIDNEY F. HARMER. 



Tubulipora flabellaris, Johnston (20, p. 274, pi. xlvi, figs. 5, 6 [imma- 

 ture]). Busk (2, p. 25 [part], pi. xxiv, figs. 1 — 3 ; pi. xxv, 6g. 2). 



P Tubulipora flabel laris, Busk (3, p. 23, pi. v, figs. 1, la—lc). 



The locality given in tlie text is Station 315 [Falkland Islands], and 

 the specimens figured presumably came from that locality. On this 

 account I regard the determination of the species as uncertain, in the 

 absence of any description of the ooeciostome. 



Tubulipora fimbria, Hincks (18, p. 448, pi. Ix, figs. 3, 3« [immature]). 



Zoarium completely adnate, variously lobed, reaching a diameter of an inch 

 in the finest specimens. The serial, connate arrangement of the zooecia is 

 strongly marked, the series becoming radial in fertile lobes. Zocecia large. 

 Ooeciopore much larger than an ordinary orifice, averaging about 355 /i, in its 

 greatest diameter. The tube is funnel-shaped, and the ooeciopore opens 

 directly or obliquely upwards, one of its edges being usually soniewbat 

 indented. Tentacles containing (homogeneous) excretory vesicles (see p. 113). 



Common in the cavities and on the outside of the remarkable nodular 

 rooting bulbs of Laminaria (Saccorhiza) bulbosa, where it reaches its 

 greatest size, and on red seaweeds from shallow water. 



I have examined large numbers of specimens of this species from Salcombe, 

 Devonshire, and from Plymouth. I have also obtained typical specimens 

 from Guernsey and from Roscoff. 



This well-marked species appears frequently in the literature 

 of the subject in its immature form, in which condition it has 

 been supposed to be adult. Its real adult condition has been 

 presumably mistaken for T. liliacea (T. serpens, auctt.) 

 by most writers; but it is clearly alluded to by Johnston (20, 

 p. 273), who quotes Mr. Peach as the authority for stating 

 that it luxuriates in the bulb of Laminaria bulbosa, and 

 that it reaches the diameter of nearly an inch. It is there 

 given as a form of T. phalange a, while on the next page 

 Johnston describes the species in its young state as T. fla- 

 bellaris. 



These specimens were sent to Johnston as T. plumosa by 



K. Acad, Wien,' xxxviii, Abth. 2, 1878, p. 20, sep. copy) ; it has, moreover, a 

 considerable resemblance to Thompson's species. The specific names pluma, 

 plumula, and plumosa are similar in meaning, but they are sufficiently 

 distinct in sound. I think there is no practical inconvenience in reviving 

 Thompson's name, and in a group where the synonymy is so involved it is 

 advisable to retain any name that can possibly be used when it is moderately 

 certain what was originally meant by it. 



