IM |ll;^||>^ — l;i;h;iiS. 8S 



Serliiluriii iiiiiiiiiin, Tlioiiipsoii Serl ularia luiin'ma, 'J'lioiiipKoii. 



Hdliconntn'a, syt. nov.? ... ... Aglaophenia howeims, \h'\^^s. 



Hall cor niu'itt, sp. iiov. V . ... Thecocarims h'evirostrix (BiiKk). 



FIhiii idiwid, iil). nov. ? ... ... Flninulan'a halei, }ii\vt]vi\ . 



Pliimnlaria '<i)iitot<((, Bale... . Plu)niilari(( spiniilosK, Bale. 



(^anipaiialaria thicta, Hiiicks (Uniipati ularia tincta, Uiiicks. 



Whitelegge's list is ol inicTi'st as being tVie first contiibu(i<iii (o tlic 

 study of the Hydroid Zoupliytes of Lord Howe Island, although uo 

 serious woi'k was attempted on the specimens with the exception of those 

 of Solaiiden'a fvi^ca (rJray), which Aveiv fully described and figured by 

 Prof. BaldAvin 8p»ncer'. 



During a visit to the island in November, lUl;'), I collected a 

 nunibei' of Hj'droids, and these, in conjunction with Whitelegge's 

 specimens, form the basis of the present paper. Although the 

 collection is a small one, consisting of twenty sjiecies belonging to 

 twelve genera, it foims a useful addition to our veiy meagi'e 

 knowledge of the Hydroid fauna of this island. The collection, 

 moreover, shows the relationship which the Hydroids bear to those of 

 neighbouring seas. Nineteen of the twenty species here recorded liave 

 previously been recognised from the Australian coast. On the other 

 hand, only two species ai'e common to the Kennadec Islands and Loi'd 

 Howe Tsland. Considering the /oo-geogra])liieal relationships of these 

 two islands, the lack of similarity in their respective Hydroid faunas is 

 A^eiy striking, especially as Hilgendorf^ has recorded eight species from 

 the Kermadecs, and I have been able to examine — through the kindness of 

 Mr. W. R. B. Oliver, of Auckland, New Zealand — a number of additional 

 forms from the same locality, as well as duplicates of Hilgendorf's 

 specimens. Of the eight species recorded by Hilgendoi-f, only one 

 (Sertidaria luiniiiui, Thompson) is common to the two islands ; and, with 

 additional material at my disposal, I have only been able to add a second 

 species, Tltt'cocurpiis hrevirostrls (Busk), from Sunday Island, Kermadecs. 

 The same species appears in Whitelegge's list as " Halicornaria, 

 sp. nov. ? " 



In an addendum I have been able to assign to their (correct positions 

 Hilgendorf's Aylaupkenia .'' x and A[ilaophe}iiti ! y, fjom Denham Bay, 

 Sunday Island, Kermadec Islands. 



The complete list of the species in the collection from iiord Howe 

 Island is as follows : — 



Family SOLANDERID^. 



Sulanderia fusca (Gray). 



Family CAMPANULAKlDJi. 



(J ainjyau ularia tiiictu, Hincks. 



Silicularia campanidaria (Lendenfeld). 



Family LAFOEID^. 

 Uebella calcarata (L. Agassiz), A'ar. cunioria, Marktanner- 

 Turneretscher. 



^ Spencer— Trans. Roy. Soc. Vict., ii., 2, 1891, pp. 8-24, pi. ii., fi<,'. l-3a, pi. iii., 



fiff. 4-8, pi. iiia., fig. 9-14. 



" Hilgendorf— Trans. N.Z. Inst., xliii., lOlU (IQH), IT- om-bV6. 



