366 EEPOET— 1891. 



direct attention to the remarks made by Mr. Bles upon the special advan- 

 tages to be derived from working at the Naples Zoological Station. 



Tlie FuliUcations of the Station. — The progress of the various works 

 undertaken by the Station is here summarised : — 



1. Of the 'Fauna und Flora des Golfcs von Neapel ' no monograph 

 has been published since the last report. The jjrcparation of the mono- 

 graphs compi"ised iu this sei'ies requires, on account of the complete and 

 exhaustive manner in which the subjects arc treated, a considerable length 

 of time, which can only rarely be estimated beforehand. It becomes on 

 this account very difficult to publish regularly a yearly set of monographs. 

 The comparatively small number issued lately will, however, soon be 

 balanced by the publication of an increased number of works, as the 

 following monographs are now in hand, and the three or four first named 

 will soon leave the press : — 



Prof. Delia Valle of Modena, on ' Gammarini.' Prof. Spengel of 

 Giessen, on ' Balanoglossus.' Dr. Giesbrecht of Naples, on ' Pelagic 

 Copepoda.' Dr. Jatta of Naples, on 'Cephalopoda.' Dr. Vosmaer of 

 Utrecht, on ' Spongia.' Prof. Falkenberg of Rostock, on ' Rhodomelese.' 

 Prof. Apathy of Klausenburg, on ' Hirudinei.' Dr.. Biii'ger of Giessen, on 

 ' Nemertini.' Prof. Chun of Breslau, on ' Siphonophora.' Dr. v. Davidoff 

 of Munich, on ' Appendiculaiia.' Dr. Miiller of Greifswald, on ' Ostra- 

 coda.' Dr. Schiemenz of Naples, on ' Pteropoda.' Prof. v. Koch of 

 Darmstadt, on ' Alcyonario..' 



2. Of the ' Mifctheilungen aus der Zoologischen Station zu Neapel,' 

 vol. ix., part iv. with 10 plates, has been published. 



3. Of the ' Zoologischer Jahresbericht ' the whole ' Bericht ' for 1889 

 has been published. 



4. Of the ' Guide to the Aquarium,' a new German and a new Fi'ench 

 edition (illustrated) have been published. A new English edition (illus- 

 trated) is being prepared. 



Extracts from, the General Beport of the Zoological Staiion. — The officers 

 of the Station have courteously fnrnislied lists (1) of the naturalists who 

 have occupied tables since the last report, (2) of the woi-ks published 

 during 1890 by naturalists who have worked at the Zoological Station, 

 (3) of the specimens sent out b}^ the Station during the past year. These 

 details, which will be found at the end of this Report, are the most con- 

 vincing evidence of the growth and efficiency of the institution. 



I. Beport on the Occupation of the Table. By Mr. William R. Mellt. 



I arrived at Naples on October 28, and was most kindly received by 

 Professor Dohrn. 



I worked at the Station every day until December 7, when I was 

 unfortunately taken ill with rheumatic fever, and remained so unwell for 

 the rest of my stay in Naples that I was able to do veiy little work. 



I left Naples on Saturday, January 3, as my doctor advised me to 

 return to England. 



Specimens of various sponges, chiefly Esperia Lorenzil containing 

 Spongicola, were obtained for me almost every day during the first part 

 of my stay. But as this animal lives in fairly deep water, it was unob- 

 tainable except in calm weather, and unfortunately during the last three 

 weeks of my stay the weather was so bad that none were procured. 



I kept my specimens in aquaria, through which a constant stream of 



