CONTENTS OF VOL. III. 



PAGE 



CLASS TUNICATA. 



ORDER I. SACCOBRANCHIATA. 



TRIBE 2. AGGREGATE . . .1 



FAMILY 5. POLYCLINID^E . 1 



GENUS 14. POLYCLINUM 2 



15. AMAROUCIUM 6 



1<>. PARASCIDIA . IS 



,, 17. APLIDIUM . 22 



18. SIDNYUM . . 29 



FAMILY fi. DIDEMNIDTE . . 31 



GENUS 19. DIDEMNUM . :!2 



20. DISTOMA . . 37 



21. LEPTOCLINUM 43 



FAMILY 7. BOTRYLLID^. . 52 



GENUS 22. BOTRYLLUS . . 52 



,, 23. BOTRYLLOIDES . . . .77 



INDEX OF SPECIES, ETC., DESCRIBED . . 89 



SUPPLEMENT. ADDITIONAL REFERENCES AND LOCALITIES. ETC. 91 



GENERAL INDEX TO THE THREE VOLUMES . . 105 



ERRATA AND CORRIGENDA 11:5 



3964 (} 



