TABLE A: SUBDIVISIONS OF 



-5918 Histology. 

 5" 9 Geographical Zoology 



^ "' [divided as in Table C]. 



*59 2 -'599 Systematic Zoology. 



592 Invertebrates. 



5931 Protozoa. 



'5933 Coslenterata. 



5934 Sponges, Porifera. 



5935 Cnidaria. 



5936 Corals. 



5937 Hydrozoa. 



5938 Ctenophora. 



5939 Echinodermata. 



594 Mollusca. 



*5947 Bryozoa, Polyzoa. 



5948 Brachiopoda. 



*5949 Tunicata. 



595 Articulata. 



5951 Worms. 



"595 1 8 Rotifera. 



5 9 5 2 Arthropoda. 



*5953 Crustacea. 



5954 Arachnida. 



-5957 Insecta. 



59571 Thysanura. 



*5957 2 Orthoptera. 



59573 Pseudoneuroptera. 



'59574 Neuroptera. 



'59575 Hemiptera. 



'59576 Coleopbera. 



59577 Diptera. 



59578 Lepidoptera. 



'59579 Hymenoptera. 



'596 Vertebrates. 



597 Fishes. 



5976 Amphibia. 



5981 Reptiles. 



'5982 Birds. 



599 Mammals. 



5999 Man [see also "573]. 



21 



