INDEX. 



[References to anatomical ^structures as "alimentary canal," etc., will be found under each form 

 and thev are not included in this index.] 



Page. 



agassizi, Pyrosoma 205, 



206, 213, 215-219, 262, 264, 266; pis. 16-18 



aherniosium, Pyrosoma 200, 



212, 213 234-235, 236, 264: pi. 24, figs. 24 and 25 



Albatross 195 



Albatross Philippine Expedition 195 



alimentary canal 205 



ambulata, Pyrosomata 195, 



197, 201, 203, 204, 206, 207, 213, 215, 223, 258 



Arctic Ocean 195 



Argynnis 1 97 



ascidiozooids 202, 21U 



atlanticum, Pyrosoma 197, 



198,201,204,206,226,236, 

 237, 258, 260, 264; pi. 15 



atlanticum , Pyrosoma 199, 



238, 239-246, 261, 

 265, 266; pis. 26- 

 28 (fig. 33), pi. 34, 

 figs. 45 and 46. 

 XP. atlan- 

 ticum for- 

 ma dipleu- 

 rosoma. . . 246-258 

 XP. atlan- 

 ticum para- 



doxum 251 



XP. verticil- 

 latum cyl- 

 indricum 258,266 

 forma diplatrosoma Pyrosoma 197, 



249-251,258,264-266; 

 pis. 32-34, fig. 47 



giganteum, Pyrosoma 200, 



237, 251-255, 257, 264, 265 



hawaiiense, Pyrosoma . . . , 237, 



246-248, 264-266; pi. 



28, fig. 34, pi. 35, fig. 49 



"intermedium", Pyrosoma.. 197,252,266 



paradoxum, Pyrosoma 208, 



248-249, 264, 265; pi. 29, fig. 35 



subspecies (?), Pyrosoma 246; 



pi. 36, figs. 50-53 



atrial aperture 206, 215 



muscles 203, 215 



atrium 202, 205, 215 



Bell 214, 260, 267 



blood-forming organ 207, 214 



Bonnier 223, 264, 266 



branchial basket 203 



lamellae 204, 205 



sac 203 



Brooks 237, 249, 264, 266, 272 



7911—19 6 



Page. 



buccal chamber 203 



siphon 201 



budding 209,213,223 



Bureau of Fisheries, United States 195 



Burghouse 204, 206 



Byxbee 215,216,264,268,270 



Carnegie Magnetic Expedition 247, 266 



ciliated funnel 206 



circulatory system 206 



cloaca 203, 205, 215 



cloacal aperture 206, 215 



tentacle 206 



Coelocormus 280 



color of Pyrosoma 200, 257 



Compound Ascidians 260 



coordination of movement 202 



cross fertilization 196 



Cyatf cormus 260 



cyathozooid 208, 210 



cylindricum , P. verticillatum 225, 



232, 264, 266; pi. 22, 

 figs. 14 and 15, pi. 33, 

 fig. 43. 

 XP. atlanticum 



atlanticum 258 



Deep-Sea Expedition 195, 225, 234, 256 



denticles (test) 201 



diaphragm 200,202,214 



"Dipleurosoma ellipticum " 237, 



249; pi. 32, pi. 34, fig. 47 



dipleurosoma, P. atlan ticum forma 197, 



249-251, 258, 264, 265, 266; pi. 32, pi, 34, fig. 47 



Distomidae 260 



distribution, geographical 259, 263-266 



Doliolidae 260 



Doliolum 203, 204, 210 



dorsal languets 204 



echinatum, Pyrosoma atlanticum 237, 



257-258, 264, 266; pi. 31, pi. 33, fig. 48 



Ehlers 200, 203, 267 



"elegans", Pyrosoma 200,201,235,241,257,260 



"ellipticum, Dipleurosoma" 237; pi. 32 



ellipticum, Pyrosoma 229, 



231-233, 239, 249, 264, 265; pi. 

 23, figs. 18-20, pi. 33, fig. 44 



em bry o 215 



embryology 208, 210 



endosty le 204 



epidermis 202 



asophagus 205 



eye 206 



Farran 266 



films, connecting 202, 203 



273 



