478 RECORD OF SCIENCE FOR 1886. 



The bibliography which has been heretofore given with these reports 

 is omitted from the present, as it has been thought that the space which 

 wouhl be occupied b}' it might be more profitably used for recording 

 new discoveries. A partial bibliography is of little or no use to either 

 the general reader or the investigator. The former rarely looks at it, 

 and the latter seeks for iuformation in the very full bibliographies or 

 records of progress that are especially devoted to the subjects in ques- 

 tion. For the current literature the " Zoologischer Anzeiger," published 

 by W. Engelmann, of Leipzig, is available, and for the past years "The 

 Zoological llecord," hereafter to be published by the Zoological Society 

 of London, the "Archiv filr iNTaturgeschichte," published in Berlin, and 

 the " Zoologischer Jahresbericht," also published in Berlin, are indis- 

 pensable for the working naturalist. The compiler desires to make 

 special acknowledgment for most material assistance to the Journal of 

 the Eoyal iMicroscopical Society, whose abstracts of investigations have 

 been freely drawn upon in the preparation of those for the present 

 report. 



synopsis of arrangement. 



General Zoology. 

 T. Protozoans. 

 Ti. PoRiFERS. Sponges. 



III. CcELENTERATES. Polyps; Acalcphs. 



IV. EcHiNODERMS. Pelmatozoaus ; Asterioids. 



V. Worms. Platyhelminths ; Nematelminths ; Annelids. 

 VL Arthropods. Crustaceans; Arachnids; Insects. 

 VII. MoLLUSKS. Acephals; Pteropods ; Gastropods; Cephalopods. 

 VIII. Protochordates. Tunicates. 

 IX. VERTEBRATES. Fish like Vertebrates; Selachians; Fishes; 

 Amphibians; Eeptiles; Birds; Mammals. 



GENERAL ZOOLOGY. 



Revivification of animals after desiccation. — It has been repeatedly as- 

 serted, and with but little contradiction, that certain low types of the ani- 

 mal kingdom are capable of being revived after having been completely 

 dried up or desiccated. Those who have questioned the statements 

 have been comparatively unheeded. But the subject has been recently 

 again investigated, practically, by Professor Zacharias, and it appears 

 that the dissent expressed by the few is justified by the new experi- 

 ments. Near Professor Zacharias's residence is a large granite block, 

 which has lain there for two hundred years, having a cavity which 

 holds from two to three liters of water that evaporates in from two to 

 six days, according to the weather. In the water resulting from rain, 

 which is heUl in this cavity, "a characteristic fauna was found to exist, 

 notwithstanding the periodical desiccation." A peculiar variety of the 

 rotifer named Fhilodina roseola, a tardigrade, and various protozoans 



