122 W. M. Bale: 



Nfit SerfiiUirld Jori/Josa . liusk. Vide Serf iiJar/a iiirhitiain 



(Laiuomoux), !>. 124. 

 Not DjiiiaiiK'nd t iirhlitdtd . LaiiKiiiioux, Vide p. 124. 



Hydroeaulus about lialf an iiicli in lieight, often coiitiinicd into 

 a stolon, unl)iaii(li('d. Hydrotliecal internodes mostly a little 

 shoi-ter tlian the widtli across the hydrothecae, one or two at the 

 siinuuit often nuieli elongated, nodes sometimes single and trans- 

 verse, often doul)U'. Avitli the lower transverse and the upper con- 

 spicuously ol)li(jur and slender, the latter occurring at irregular 

 intervals. 



Hydrothecae opposite, a paii- on each internode, divergent, but 

 with the lower prtrtions in contact or approximate in front, 

 separated behind; mostly short and s(piat in form, Avith a distinct 

 oblique fold or ridcfe crossing them about the middle; aperture look- 

 ing outwards and upwards, with two lateral teeth, generally blunt 

 and rounded, but in some specimens more pointed, a third tooth 

 often developed above. 



Gonothecae ovate, truncate, not compressed, with several strong 

 annular ridges; summit witl: a wide operculate opening; borne on 

 the lower part of the shoots. 



Colour, brown, pale to very dark. 



//rt^,._Q,ieenscliff ; Port Phillip; Portland (Mr. Maplestone) > 

 Natal Coast, common (Warren). 



Undei- the name of S. loculosa Busk, I included in the " Cata- 

 logue of the Australian Hydroid Zoophytes," along with Busk's 

 type, two or three forms which I had observed in collections from 

 Port Phillip. One of these, of pinnate habit, is probably identical 

 with S. inrflata (Versluys), and, Avitli tliat species, is referred in the 

 present paper to the Di/iKiniciia nuini'niata of Kirchenpauer. The 

 other varieties differ considerably from Busk's, and 1 have long 

 been doubtful whether they should not be separated, though reluc- 

 tajit to propose a new name on grounds perhaps insufficient. 



In 1009 Billavd announced, as a result of liis examination of 

 Laniouroux' types, that the B. turhinata of that autlior is the same 

 as Busk's .S". lorvlosd. corresponding in all respects, as Dr. Billard 

 informs me, Avith Jiusk's draAving. 1 now propose, Avhile accepting 

 the original name, N. hirhiiuitd, lor Busk's species, to separate the 

 common short-celled forni, and to retain for it the name of S. 

 loc/ilosa, under Avhich it is already generally knoAvn. The grounds 

 of Reparation will be liriefiy stated. 



In S. loculosa, as restricted, the liydrothecae are short and squat 

 in form, slightly divergent throughout, so that the two constituting 



