INVERTEBRATAj ORYPTOGAMIA, MICROSCOPY, ETC, 925 



has only as yet been collected by the ' Challenger ' (off the Azores 

 and near Brazil) was also met with. 



Most of the Mollnsca belong to the deep-sea fauna of the Xorth 

 Atlantic and of the Arctic Seas ; among the Mediterranean forms, 

 there were some which as yet have only been found in the fossil 

 state. The similarity of the deep-sea fauna at different latitudes is 

 very strikingly shown by this collection, Pteroj^oda were taken 

 from all depths ; indications of HeteroiJoda were not absent. A short 

 list of the more important Mollusca obtained is given by M. Milne- 

 Edwards in a foot-note.* 



ChaBtopod worms were abundant at all the stations ; a species of 

 the remarkable Chcetoderma was also taken ; two or three new genera 

 of Gei)hyrea were met with, and several of the forms had a resemblance 

 to the arctic species. 



A new species of Edwardsia (or Hyanthus), a beautiful red Adamsia, 

 a large Bunodes, and a new species of Flabellum represent the most 

 striking Zoantharia ; the Alcyonaria are reported to be very remark- 

 able, and among them was a specimen of the rare Umhellularia. 



The Echinodermata appear to form the most valuable part of the 

 collection ; there is a new species of Phormosoma, which is to be dis- 

 tinguished from P. placenta by the ornamentation of the plates, and 

 by its large sjiines on the oral surface ; Pourtalesia Jeffreysii, two 

 new and remarkable iSpatangoids make up the chief Ecliinid gains. 

 The Asterida were all interesting and rare ; but above all we have to 

 note the capture of Brisinga coronata, which was taken at several 

 stations. Among the Ophiurids, which were abundant, there was 

 found one which, not described, is said to be probably the represen- 

 tative of an absolutely new type. There are some new and fine species 

 of Holothurioida, Among the Crinoids we find only two examples of 

 an Aidedon, allied to A. Sarsi of the Northern Seas. 



Hyalonema, Holtenea, Farrea, &c., were among the Siliceous 

 Sponges, 



Large specimens of Orhitolifes ieniiisshna and a magnificent series 

 of arenaceous forms are to be noted among the Foraniiuifera. 



In some cases the dredge descended to 3000 metres, and, in addi- 

 tion to the zoological collections, there have been made observations 

 of very consideiablo importance on the hydrographical relations of 

 the sea-bottom of this region. 



Deep Dredgings in the Lake of Tiberias,t— The luvcrtebrata 

 obtained by M, Lortet in these dredgings include ten species of 

 Mollnsca, of which three are new to science. These are named by 

 M. Locard, Unio Lortdi, U. pictrl, U. Maris Galilai. The otbcr 

 species arc Unio tcrminalis and tijridis, Cyrcna flnminalis, Neritina 

 jordani, Melania tuherculata, MelanopHis prwmorsa and costala. Tho 

 three latter shells give the fauna a marine appearance ; and it is to bo 

 considered as a transition-fauna between salt and fresh water, tho 

 lake having probably been originally salt, and subsequently altered 



* See also tlio lists of Dr. J. Gwyn JefTrpys, 'Ann. niul M;ip. Nat Hi.-;t ' vi 

 (1880), pp. 31.') and 374. 



t 'Comptea Rendns,* xoi. (1880) p. r)no. 

 VOL. III. 3 Q 



