2 Proch . 
XIII. Prochordata. 
[1920] 
1.— TITLES. 
Dufrenoy, J. L*excr6tion des color- 
ants vitaux et la d6g6n6rescense chez 
les Ascidies. Paris C.R. Acad. Sci. 171 
1920 (52-55). 1 
Fulton, J. F. The blood of Ascidia 
atra Lesueur ; with special reference 
to pigmentation and phagocytosis. 
Acta Zool. Stockholm 1 1920 (381-431) 
2 pis. 2 
Hartmeyer, R. Eine wiedergefundene 
Ascidie. Berlin Sitzb. Ges. natf. 
Freunde 1918 (385-396). 8 
Hartmeyer, R. Poly ci tor ruber (Sav.). 
Berlin Sitzb. Ges. natf. Freunde 1919 
(285-295). 4 
Julin, C. et Robert, A. Sur Porgano- 
gen&se dans les blastozo'ites de Pero- 
phora. Paris C.R. Acad. Sci. 171 1920 
(936-939). 5 
Michael, E. L. Differentials in 
Behavior of the two Generations of 
Salpa democratica relative to the 
Temperature of the Sea. Berkeley 
Univ. Calif. Publ. Zool. 18 1918 (239- 
298) pis. ix-xi. 6 
Michaelsen, W. Zur Kenntnis dor 
Didomniden. Hamburg Abh. natw. 
Ver. 21 pt. 1 1919 (1-44). 7 
Michaelsen, W. Expedition S. M. 
Schiff “ Pola ” in das Rote Meer 
nordliche und sudliche halfte 1895/96- 
1897/98 zoologische Ergebnisse. xxxii. 
Ascidia Ptychobranehia und Dictyo- 
branchia des Roton Meoros. Donkschr. 
k. Ak. Wiss. Wien 95 1918 Berichte 
Komm. Ozean. For. 120 pp. 1 pi. 8 
Mikhailoff, S. Influence de l’ablation 
des centroa nerveux sur la regeneration 
des organes innerves par ces centres. 
Monaco, Bull. Inst. Ocean. 376 1920 
8 pp. 9 
Pax, F. Phoronidea. Boitrage 
Kenntnis Meer. Westafrikas 3 1920 
(34-35). 10 
Ridewood, W. G. Cephalodiscus. 
British Antarctic (Terra Nova) Exped. 
Zool. 4 No. 2 (11-82) 6 pis. 1918. 11 
Ridewood, W. G. A Key for the 
Ready Identification of the Species of 
Cephalodiscus. Ann. Mag. Nat. Hist. 
London Ser. 9 5 1920 (407-410). 12 
Robert, A. vide Julin, C. 
Van Name, W. G. Ascidians from 
the Philippines and Adjacent Waters. 
Washington Smithsonian Inst. U.S. 
Nat. Mus. Bull. 100 1918 Vol. 1 
(49-174) pis. xxiii-xxxiii. 13 
Wernicke, W. Uber die Eibildung 
der Ascidien. Zool. Jahrb. Jena abt. 
f. Anat. 41 1919 (113-174) pis. 10-12. 14 
Wijhe, J. W. van. De anatomie der 
larve van Amphioxus lanceolatus in de 
Verklaring van hare asymmetrie. [On 
the Anatomy of the larva of Amphioxus 
lanceolatus and the explanation of its 
asymmetry.] Amsterdam Versl. Wis. 
Nat. afd. K. Akad. Wet. 27 1919 (581- 
592) (Dutch) ; Amsterdam Proc. Sci. 
K. Akad. Wet. 21 1919 (1013-1020) 
(English). 15 
II.— SUBJECT INDEX. 
STRUCTURE. 
Hartmeyer, 3, 4 ; Michaelsen, 7 ; 
Ridewood, 11 ; Van Name, 13. 
PHYSIOLOGY. 
Dufrenoy, 1 ; Fulton, 2 ; Mikhailoff, 
9. 
DEVELOPMENT. 
Eggs ; Wernicke, 14 : Larvae ; Wijhe, 
15 : Organogeny ; Julin and Robert, 5. 
ETHOLOGY. 
Michael, 6. 
DISTRIBUTION. 
Rod Sea : Michaelsen, 8. Atlantic : 
Pax, 10. Antarctic : Ridewood, 11. 
Philippines : Van Name, 13. 
