102 Tlie Genera of the PlumulariidcB, 



IV. Remaeks on Eecent Publications. 



The Australian Hydromedus^. — By R. von Lendenfeld, 

 Ph.D. (from the Proceedings of the Linnean Society of 

 New South Wales, Vols. IX. and X.). 



Dr. von Lendenfeld's work is an important contribution to 

 tlie histor}^ of the Australian Hydroida, containing a detailed 

 S3^stem of classification, a list of previously-described species, 

 with references and descriptions of many new species, most 

 of which are illustrated by admirable figures. The life 

 histories of some of the species have been worked out, and 

 their histology carefully studied and illustrated. 



The species cited or described in Dr. von Lendenfeld's work 

 belong to a wider area of distribution than that which is repre- 

 sented in the "Catalogue of the Australian Hydroid Zoophytes." 

 From the author's remark regarding a New Zealand species, 

 to the effect that I appeared to doubt its habitat, as I had 

 omitted it from the " Catalogue," it is evident that he has 

 overlooked the remarks on distribution, which show that 

 the Australian region, as represented in the " Catalogue," 

 comprises only the continent and the seas immediately 

 adjacent, not including New Zealand. Dr. von Lendenfeld, 

 on the other hand, includes " within the Australian area the 

 south coast of New Guinea, Fiji, New Zealand, Australia, 

 and Tasmania, and the islands south-west of Fiji;" but in 

 enumerating the species which have been described, he has 

 omitted several which are found within these limits, and 

 which are included in the following list : — 



Thuiaria ononilifera, Hutton, sp. Sertularia monilifera, 

 Hut., T.N.Z.I., v.; Coughtrey, T.N.Z.I., YIL; D'A. W. 

 Thompson, An. and Mag. Nat. Hist., Feb., '79; Thuiaria 

 cerastium, Allman^ Journ. Lin. Soc. Zool., XII. 

 N. Zealand. 



Thuiaria subarticulata, Coughtrey, T.N.Z.I., VII.; D'A. W. 

 Thompson, An. and Mag. Nat. Hist., Feb., '79 ; T. articu- 

 lata, Hutton, T.N.Z.I., Y. (not Johnston); T. hidens, 

 Allman, Journ. Lin. Soc. Zool., XII. N. Zealand- 



Thuiaria dolichocarj^a, Allman, Journ. Lin. Soc. Zool., XII.; 

 D'A. W. Thompson, An. and Mag. Nat. Hist., Feb., '79; 

 T. Zelandica, Gray, Dief., N.Z.; Quelch, An. and Mag. 

 Nat. Hist., April, 1883. N. Zealand. 



Sertularella rohusta, Coughtrey, sp. Sertularia simplex, 

 var. (?), Coughtrey, T.N.Z.I., VII.; 8. rohusta, Coughtrey, 

 T.N.Z.L,VIII., An. and Mag.N.H, Jan. 1876. N. Zealand. 



