478 RECORD OF SCIENCE FOR 18SG. 



The bibliography which has been heretofore giveu with these reports 

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

 woukl be occupied by it might be more profitably used for recording 

 new discoveries. A i)artial 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 information 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. Eugelmaun, of Leipzig, is available, and for the past years "The 

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

 of London, the "Archiv fiir jSTaturgeschichte," 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 Royal j\Iicroscopical Society, whose abstracts of investigations have 

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

 report. 



synopsis of arrangement. 



General Zoology. 

 I. Protozoans. 

 II. Porifers. Sponges. 



III. Ccelenterates. Polyps; Acalephs. 



IV. ECHINODERMS. Pelmatozoans ; Asterioids. 



V. Worms. Platyhelmiutbs ; Xematelminths ; Annelids. 

 VI. Arthropods. Crustaceans; Arachnids; Insects. 

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

 VIII. Protochordates. Tunicates. 

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

 Amphibians; Reptiles; Birds; Mammals. 



general zoology. 



Bevivijication 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 u[) or desiccated. Those who have questioned the statements 

 have been comparatively unheeded. Bat 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 held in this cavity, "a characteristic fauna was found to exist, 

 notwithstanding the periodical desiccation." A peculiar variety of the 

 rotifer named ThUodina roseola^ a tardigrade, and various protozoans 



