16G THOJIAS WHITELEfWiE.— MAKIXE AND FRESH-WATER 



thus offering a fit subject for study to the student, in which the 

 various stages of development can be easily observed and specimens 

 may be obtained in abundance for at least eight months in the year. 



The Echinoidea are represented by 29 species, a few being con- 

 fined to Port Jackson, five may be said to be fairly common, and 

 the rest are more or less rare. For our knowledge of the Echini 

 we are indebted to the late Rev. J. E. Tenison-Woods and Dr. E. P. 

 Ramsay. The Holothurioidea have only been partially worked, 

 and it is probable that there are many more species than the 1 6 

 herein mentioned. 



The Marine Worms have been partly dealt with by Dr. Haswell, 



somewhat neglected class. I have to thank him for much valu- 

 able information relating to the fauna of Port Jackson generally, 

 and the worms in particular, also for his having kindly revised 

 the MS. and at the same time added many species to the list. 



The Crustacea have also been worked out by Dr. Haswell in a 

 catalogue pul)lished by the Trustees of the Australian Museum : 



additions iiKide chiefiy througli the collections of the "Challenger" 

 and ot the ■• Ah^rt," together with some few added by myself . The 



r Repo, 



rts and th 



e total numbei 



• of species 



To Dr. 



Haswell, 



indebtedness 



is due for 



the Pyc 



mogonida 



or sea-spiders, 



four out of 





ang been 



described by 1 



him in the 



'aVul I'd 



esire to thank Mr. A.'S, 



, Olliff and 



The Mollusca appear to have had more attention paid to them 

 than any of the other invertebrates. It would have been almost 

 impossible for me to have done justice to this section, had I not 

 had the assistance of Mr. John Brazier of the Australian Museum, 

 who has afforded very great help in the way of books and papers, 

 as well as in allowing me to use his notes relating to synonyms, 

 habitats, ttc, in addition to which my thanks are due to him for 

 his kindness in undertaking the revision of the list of shells, and 

 for information regarding many other branches of marine zoology. 



The Molluscoidea are fairly represented, but there still remains 

 much to be done in this group. The Polyzoa have to a great 

 extent been worked out by Mr. A. W. Waters, chiefly from 

 material collected by Mr. Brazier. 



The Tunicata are not well represented considering the number 

 of forms to be seen on our rocky shores. The species enumerated 

 are taken chiefiy from the list contained in the "Voyage of tlie Chal- 

 lenger," by Prof. Herdman, who has in hand a large collection 



