ILLUSTRATIONS 



PLATES 



The Salpidae: A Taxonomic Study 



By Maynard M. Metcalf, with the assistance of Mary M. Bell 



Page 



1, 2. Cyclosalpa pinnate 182 



3. Cyclosalpa affinis 182 



4. Cyclosalpa affinis, C. floridana 182 



5, 6. Cyclosalpa floridana 182 



7. Cyclosalpa bakeri, solitary form 182 



8-10. Cyclosalpa bakeri, aggregated zooid 182 



1 1 . Cyclosalpa virgula 182 



12, 13. Cyclosalpa virgula, aggregated zooid 182 



14. Traustedtia multitentaculata, subspecies bicristata, solitary form.. 182 



Pyrosoma: A Taxonomic Study Based upon the Collections 

 of the United States Bureau of Fisheries and the United 



States National Museum 



By Maynard M. Metcalf and Hoyt S. Hopkins 



1 5. Pyrosoma atlanticum 272 



16-18. Pyrosoma agassizi 272 



19, 20. Pyrosoma spinosum 272 



21. Pyrosoma spinosum, P. verticillatum 272 



22. Pyrosoma verticillatum and its subspecies cylindricum 272 



23. Pyrosoma hybridum and P. ellipticum 272 



24. Pyrosoma operculatum and P. aherniosum 272 



25. Pyrosoma ovatum 272 



26, 27. Pyrosoma atlanticum atlanticum 272 



28. Pyrosoma atlanticum atlanticum and P. atlanticum fiawaiiense 272 



29. Pyrosoma atlanticum paradoxum and P. atlanticum triangulum.. 272 



30. Pyrosoma atlanticum giganteum 272 



31. Pyrosoma atlanticum echinatum 272 



32. Pyrosoma atlanticum, form dipleurosoma 272 



33. Pyrosoma agassizi; P. verticillatum cylindricum; P. ellipticum.. 272 



34. Pyrosoma atlanticum atlanticum; P. atlanticum form dipleuro- 



soma 272 



35. Pyrosoma atlanticum echinatum; P. atlanticum fiawaiiense 272 



36. Pyrosoma atlanticum, subspecies doubtful; P. atlanticum atlan- 



ticum; P. fiybridum 272 



Silicious and Horny Sponges Collected by the U. S. Fisheries 

 Steamer "Albatross" during the Philippine Expedition, 

 1907-1910 



By H. V. Wilson 



37-52. Silicious and horny sponges from Philippine waters 507-522 



rv 



