llV|ii;ii|l>S — HKKWJS. '.\9 



Many specimens ol' tliis species, tJic l.irgest 25 mm. in height, were 

 obtained. Tlie strnctuial details agree more closely with Warren's 

 figures of Natal specimens than with those by Marktanner-Turneretscher 

 and Nutting. In this I'espect the specimens differ f i om those I'ecorded 

 hv Ritclne from the East Indian Ocean. The characters agree in detail 

 with ^Varren's description, except that the hydrothecfe only very seldom 

 show ;i tendency to arrange themselves in gi'oups towards the distal ends 

 of the branches. As in Clarke's Perico Island specimens, some of the 

 stem internodes bear a branch and thi'ee hydi^othecse on one side, and two 

 hydrothecne on the other. In rare cases opposite instead of alternate 

 bi'auches ai'ise fiom the proximni stem-internode. iUynoxoiue n(»t present. 



Diiue)isioti>:.- — - 



Height of L-ol(iny ... ... ... ... ... ... up to 25 mm. 



Typical stem interuode, length ... ... ... lol mm. 



Stem internode, diameter ... ... ... ... 0-21-0-31 mm. 



Branch, length ... ... ... .. ... ... u}} to 10 mm. 



Hydrotheea, length of adnate portion ... ... 0-43-0-47 mm. 



Hydrotheca, length of free portion ... ... ... 0-14-0'17 mm. 



Hydrotheca, diameter ... ... ... ... ... O'14-O-lo mm. 



Sijiioiii/mij. — Pictet has ranked Lhjimiueiin tithulifninih, Marktanner- 

 Turneretscher, as a synonym of 'nminria reii(e, Thompson. The two 

 species, however, are quite distinct, as is shown by their different 

 gonangia. Pictet, moreover, has referred to T. rego' specimens from 

 Amboyna, which clearly belong to T. tuhidiformis ; his desci-iption and 

 figures of them agree exactly with T. tnbii1lforuii.'<, and the dimensions 

 correspond with those given by Marktanner-Turneretscher. 



HemurJis. — The range of this species must now be extended to 

 include the eastern coast of Australia, as I have recently collected 

 numerous specimens on the Great Bari-ier Reef, about the latitude of 

 Cooktown, where it appears to be the most frequently-occurring Hydroid 

 on the reefs. I have also examined specimens fiom Caloundra, 

 Queensland, and from Nelson's Bay, I'oit Stephens, New Soiith Wales. 



Lnr. — Middle Beach, Lord Howe Island. Common under stones. 



TJidrihiitio)} — Pi'eviously recorded from Dschidda, Red Sea (Mark- 

 tanner-Tiarneretschei') ; Amboyna, East Indies (Pictet, as Sertidana 

 i-egce) ; Gulf of Tadjourah (Billard) ; Bay of Bahia, Brazil ; Florida, 

 between Salt Pond and Stock Island ; Bahama Banks, 3-6 fathoms 

 (Nutting) ; Perico Island, Gulf of Panama (Clarke) ; St. Thomas Island, 

 Atlantic Ocean (Billard) ; Isipingo, Scottburgh, Park Rynie, Natal 

 (Warren) ; Suez Bay, 10 fathoms (Thornely) ; Flying-Fish Cove, 

 Christmas Island, Indian Ocean (Ritchie). 



Genus Pasythka, Lamoiirottx. 



Pasythea quadridentata (Ellis anrt Sulunder), 



var. OBLIQUA, Lamonroiix. 



Ihjiiniiiena dJiliijnn, Ijamouroux, Hist. Polyp. Cor. Flex., 1816, p. 179. 

 Pasythea (jiiadridentnta, Bale, Proc. Linn. Soc. N.S.Wales (2), iii., 1868, 

 * p. 770 (part), pi. xiv., tig. 6. 



