11 N 



2003-2031. Brachiopoda. Polyzoa (or Bryozoa). 



2003 Braceiiopoda. Polyzoa. Compreiiensiye and General 

 Works. 



2007 Brachiopoda. Polyzoa. Structure. 



[For sub-divisions, see 0207.] 



2011 Brachiopoda. Polyzoa. Physiology. 



[For sub-divisions, see 0211.] 



2015 Brachiopoda. Polyzoa. Development. 



[For sub-divisions, see 0215.] 



2019 Brachiopoda. Polyzoa. Ethology. 



[For sub-divisions, see 0219.] 



2023 Brachiopoda. Polyzoa. Variation and Etiology. 

 [For sub-divisions, see 0223. J 



2027 Brachiopoda. Polyzoa. Geography. 



[For sub-divisions, see J, 1 and 2.] 



2031 Brachiopoda. Polyzoa. Taxono:my and Systematic. 



It should be stated on the sHp v/hether it i elates to 



Brachiopoda or Polyzoa, or both. 

 Polyzoa includes Ectoprocta and Entoprocta. 



2203-2231. Mollusca. 

 2203 Mollusca. Comprehensive and General Works. 



2207 Mollusca. Structure. 



[For sub-divisions, see 0207.] 



2211 Mollusca. Physiology. 



[For sub-divisions, see 0211.] 



2215 Mollusca. Development. 



[For sub-divisions, see 0215.] 



2219 Mollusca. Ethology. 



[For sub-divisions, see 0219.] 



2223 Mollusca. Variation and Etiology. 



[For sub-divisions, see 0223.] 



2227 Mollusca. Geography. 



[For sub-divisions, nee J, 1 and 2.] 



2231 Mollusca. Taxonomt and Systematic. 



Lamelhbranchiata (or Pelecypoda). Scaphopoda. 



Amphineura. 

 Gastropoda, includes Prosobrauchiata, Nucleobranchiata 



(or Heteropoda), Opisthobranchiata, Pteropoda, Pul- 



monata. 

 Cephalopoda, includes Nautiloidea, Ammonea, Di- 



branchiata. 



