196 



2. Linnean Society of New South Wales. 



28th January, 18S5. — 1) A Monograph of the Australian Sponges 

 Part IV. The Myxospongiae. By R. von Lendenfeld, Ph.D. In this 

 paper the Australian species are described. (The author partly adopts the 

 view of SoUas regarding the separation of the Halisarcidae and Gumminae.) 

 The structure of Bajalus, a new Genus of Halisarcidae, is described. The 

 subdermal cavities are remarkably developed. Amoeboid wandering cells 

 were found in a dense layer beneath the outer skin. Gland cells are descri- 

 bed. Sexual products mature only in the innermost part. The gastral cavity 

 serves as a marsupium. The anatomy of Choncb-osia Ramsay i n. sp., Chon- 

 drilla papillata n. sp., and corticata n. sp., shows some points of interest. 

 Peculiar subdermal cavities are described in the former. The two latter 

 possess a special cortical skeleton. The classification used is the following : 



II. Ordo : Myxospongiae Hœckel. Sponges without Skeleton or with 

 Polyactinellid Flesh spicules. 

 I. Subordo Myxinae von Lendenfeld. Myxospongiae, with structure- 

 less mesodermal groundsubstance. Exceptionally few and distant 

 fibrills. Identical with Halisarcinae O. Schmidt. 



8. Familia. Oscarellidae von Lendenfeld. Mj'xinae, with spherical 

 ciliated chambers, for Halisarca lobularis O. Schmidt, Oscarella 

 Vosmaer. No Australian species. 



9. Familia. Halisarcidae von Lendenfeld. Myxinae with sac-sha- 

 ped elongated ciliated chamber. New genus Bajalus. 1 species. 



II. Subordo. Gumminae O. Schmidt. Myxospongiae with a fibrillous 

 Mesodermal ground substance. 



10. Familia. Ohondrosidae F. E. Schulze. Characters of the Sub- 

 order. 



I. Subfamilia. Chondrosinae von Lendenfeld. Chondrosidae without 

 flesh spicules. 1 species. 



11. Subfamilia. Chondrissinae von Lendenfeld. Chondrosidae with 

 flesh spicules. 4 species. 



2) The method of Section Cutting with some improvements. By 

 R. V. Lendenf eld, Ph. D. In this Paper the author gives a very detailed de- 

 scription of this method, and adds some small improvements. The author com- 

 bines Caldwell's and F. E. Schulze's methods of preventing sections from 

 curling up. — 3) Amoeba parasitica. A new Parasitic Protozoan infesting 

 Sheep. By R. von Lenden fe Id, Ph. D. The author d\\'ells in this Paper 

 on the interesting parasite which he exhibited at the last Meeting of the 

 Society. He has since succeeded in breeding the parasite artificially in an 

 Aquarium, from the scurf of a sheep affected by the disease. The Amoeba 

 which has been thus produced is described. — (4. 5. 6. not zoological.) — 

 7) On aNew Snake from the Barrier Ranges. By William Macleay , F.L.S., 

 etc. The description is here given of a species of Furina to which the 

 specific name of Ramsayi is affixed. Some specimens of it were exhibited, 

 as well as specimens of Vermicella, Typhlops, and D^hnn. from the same 

 localitv. 



Druclc von Hreitkopf & Hârtel in Leipzig. 



