biological elmiactei' — the first " On the Position of the 

 Ampullaceous 8ac and the Function of the Water Canal- 

 System in the Spongicla ;"* and the second, " On the 

 Reproductive Elements of the Spongida."-|- The latter was 

 his last sponge paper in the Annals and Magazine of Natural 

 History, in which he had now been publishing for 41 years. 

 It was succeeded by his report on tlie sj^onges of the Mergui 

 Archipelago, in the Journal of the Liiinean Society of 

 London,^ which, however, Mr. Carter informs me was 

 written so far back as 1 883. 



As Ml-. Carter has at length been obliged by the state of his 

 health to cease working at his favourite subject, and as we 

 shall probably have no more papers on sponges from this 

 indelatigable and able naturalist, it has occurred to me that 

 I might perhaps benefit other naturalists as well as myself 

 by the ])ublication of a complete list of all the genera and 

 species which he has described. These are arranged in alpha- 

 betical order, with full references to the places where the 

 descriptions are to be found, and it is hoped that the list will 

 serve as an index to Mr. Carter's papers. 



The list of genera and species was compiled whilst I was 

 working in the Natural History Department of the British 

 Museum, and it contains 1)8.5 references, every one of which 

 was obtained fi"oni the original papei'. In addition to the 

 species described for the first time by Mr. Carter himself, 

 which are distinguished by tlie ]:)resence of his name attached 

 to them, the list contains a number of his more important 

 refeiences to the species of <jther authors. Care has been 

 taken to give all the names exactly in the form in which 

 they appear in Mr. Carter's works, and although subsequent 

 research will probably necessitate considei-able modification 

 in Mr. (barter's nomenclature, I have felt that it would be 

 out of place to attempt any such modification here. 



It may be of especial interest to Victorian Naturalists to 

 observe, that more than a quarter of the s])ecies and varieties 

 mentioned in the list are recorded by Mr. Cartel" fiom the 

 neighbourhood of Port Phillip Heads and Western Port. 



* A. M. N. H. Ser. 5. Vol. xix, p. 203. 

 t A. M. N. H. Scr. 5. Vol. xix, p. 350. 

 I Jour. Linn. Soc. Vol. xxi, p. 61. 



