SCHEME OF THE CLASSIFICATION ADOPTED 
IN THIS BOOK 
The names of extinct groups are printed in rtalies. 
CHORDATA (p. 3). 
I. HEMICHORDATA (p. 3). 
Order. Family. 
ENTERO- Glandicipitidae(p. 17). 
PNEUSTA Ptychoderidae (p. 17). 
(p. 5) Harrimaniidae (}. 17). 
PTERO- 
BRANCHIA 
(p. 21) 
PHORONIDEA 
(p. 27) 
II. UROCHORDATA=TUNICATA (pp. 4, 35, 63). 
Order. Sub-Order. Family. Sub-Family. 
LARVACEA | Kowalevskiidae (p. 68). 
Amani + Appendiculariidae 
(p. 64) PI : 
ae (p. 68). 
( Clavelinidae (p. 71). 
( Hypobythiinae 
are sea on (p. 72). 
ae Ascidiidae (p. 72). - Neettiins (p. 72). 
(p. 71) < _Corellinae (p. 73). 
Bios ( Styelinae (p. 74). 
Cynthiidae (p. 74). + Cynthiinae (p. 75). 
| Bolteninae (p. 75). 
ASCIDI- _Molgulidae (p. 77). 
ACEA 4 ' Distomatidae (p. 85). 
(p. 70) M t Coelocormidae (p. 86). 
Ascidiae naa @ | Didemnidae (p. 86). 
Compositae- |) | 5) | Diplosomatidae (p. 87). 
(p. 80) _ Polyelinidae (p. 87). 
Holosomata /{ Botryllidae (p. 88). 
\  (p. 88) \ Polystyelidae (p. 89). 
Ascidiae 
Luciae Pyrosomatidae (p. 91). 
(p. 90) 
THALI- f Cyclomyaria Doliolidae (p. 96). 
Groh (ae ee ae 
(p. 95) | Hemimyaria f{ Salpidae (p. 101). 
é epi) \ Octaenemidae (p. 108). 
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