SCHEME OF THE CLASSIFICATION ADOPTED 

 IN" THIS BOOK 



Order. 

 ENTERO- 

 PNEUSTA 



(p. 5) 



PTERO- 



BRANCHIA 



(p. 21) 



PHORONIDEA 



(p. 27) 



Order. 



LARVACEA 



(p. 64) 



The names of extinct yroups are printed in italics. 

 CHORDATA (p. 3). 



I. HEMICHORDATA (p. -3). 



Family. 



( Glandicipitidae(p. 17). 



I Ptychoderidae (p. 17). 



(_ Harrimaniidae (p. 17). 



II. UEOCHORDATA= 



Sub-Order. 



ASCIDI- 

 ACEA 



(p. 70) 



TUNICATA (pp. 4, 35, 63). 



Fiiiiiily. 

 i Kowalevskiidae (p. 68). 

 \ Append iculariidae 

 \ (p. 68). 



Clavelinidae (p. 71) 



Sub-Family. 



Ascidiae 

 Simplices 



(p. 71) 



Ascidiae 

 Compositae - 



(p. 80) 



Ascidiae 

 Luciae 



(p. 90) 



Asoidiidae (p. 72). 



C Hypobythiinae 

 I (p. 72). 



\ Asoidiinae (p. 72). 

 [ Corellinae (p. 73). 

 rStyelinae (p. 74). 

 Cynthiidae (p. 74). -j Cynthiinae (p. 75), 



Merosomata 



(p. 85) 



Holosomata 



(p. 88) 



[ Cyclomyaria 



/ nef 1 Hernimyaria 



(P- 95) [ (p. i5i) 



Molgulidao (p. 77). 



(Distomatidae (p. 85). 

 Coelocorniidae (p. 86). 

 Didemnidae (p. 86). 

 Diplosomatidae (p. 87). 

 Polyolinidae (p. 87). 

 f Botryllidae (p. 88). 

 \ Polystyelidae (p. 89). 



Pyrosomatidae (p. 91). 



Doliolidae (p. 96). 



/ Salpidae (p. 101). 



^ Oetacnemidae (p. 108). 



( Bolteninae (p. 75). 



