BULLETINS 21 



Pt. 9. Polychaetous annelids collected by the United States Fisheries 

 steamer Albatross during the Philippine Expedition of 1907-1910. 

 By Ruth A. Hoagland. Pp. 603-634, 7 pis. Mar. 24, 1921. 

 Pt 10. The polyclad turbellarians from the Philippine Islands. By Tokio 

 Kaburaki. Pp. 635-649, 6 figs., 2 pis. Jan. 14, 1924. 

 Vol. 2. Papers on collections gathered by the Albatross Philippine Expedition, 

 1907-1910. Pp. i-vii, 1-562, 159 figs., 60 pis. Apr. 21, 1932. 

 Pt. 1. The Salpidae collected by the United States Fisheries steamer Alba- 

 tross in Philippine waters during the years 1908 and 1909. By 

 Maynard M. Metcalf. Pp. 1-.4. May 7, 1919. 

 Pt 2 The Salpidae: A taxonomic study. By Maynard M. Metcalf, with 

 the assistance of Mary M. Bell. Pp. S-193, 150 figs., 14 pis. Apr. 

 29, 1919. 

 Pt. S. 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. Pp. 

 195-272, 9 figs., 22 pis. July 19, 1919. 

 Pt. 4. Silicious and horny sponges collected by the U. S. Fisheries steamer 

 Albatross during the Philippine Expedition, 1907-1910. By H. V. 

 Wilson. Pp. 273-532, 16 pis. Oct. 19, 1925. 

 Pt. 5. The shipworms of the Philippine Islands. By Paul Bartsch. Pp. 

 533-562, 1 fig., 8 pis. Apr. 28, 1927. 

 Vol. 3. Starfishes of the Philippine seas and adjacent waters. By Walter K. 



Fisher. Pp. i-xi, 1-712, 156 pis. June 27, 1919. 

 Vol. 4. Foraminifera of the Philippine and adjacent seas. By Joseph A. Cush- 



raan. Pp. 1-608, 52 figs., 100 pis. Aug. 18, 1921. 

 Vol. 5. Ophiurans of the Philippine seas and adjacent waters. By Rene Koehler. 



Pp. i-x, 1-486, 103 pis. Apr. 6, 1923. 

 Vol. 6. Papers on Philippine diatoms, annelids, hydroids, echinoids, and mol- 

 lusks. Pp. i-viii, 1-567, 47 figs., 120 pis. Jan. 19, 1940. 

 Pt. 1. Marine diatoms of the Philippine Islands. By Albert Mann. Pp. 



1-182, 39 pis. June 27, 1925. 

 Pt. 2. Additions to the polychaetous annelids collected by the United State* 

 Fisheries steamer Albatross, 1907-1910, including one new genus 

 and three new species. By Aaron L. Treadwell. Pp. 183-193, 

 20 figs. Nov. 20, 1926. 

 Pt. 3. Report on the Hydroida collected by the United States Fisheries 

 steamer Albatross in the Philippine region, 1907-1010. By Charles 

 C. Nutting. Pp. 195-242, 8 pis. Apr. 27, 1927. 

 Pt. 4. Report on the Echinoidea collected by the United States Fisheries 

 steamer Albatross during the Philippine Expedition, 1907-1910. 

 Part 1. The Cidaridae. By Theodor Mortensen. Pp. 243-312, 

 22 figs., 33 pis. Sept. 10, 1927. 

 Pt. 5. Four new species of polychaetous annelids collected by the United 

 States Fisheries steamer Albatross during the Philippine Expedi- 

 tion of 1907-1910. By Aaron L. Treadwell. Pp. 313-321, 4 figs. 

 Oct. 31, 1931. 

 ,^ Pt. 6. The Philippine land raollusks of the genus Opisi/ioporus. By Paul 



Bartsch. Pp. 323-327, 1 fig., 2 pis. June 18, 19S2. 

 J!5* Pt. 7. The Philippine land mollusks Cochlostyla rufogaster and Obba mar- 

 morata and their races. By Paul Bartsch. Pp. 329-342, 4 pl». 

 Aug. 20, 1932. 

 ^ Pt. 8. The land shells of the genus Ohba from Mindoro Province, Philip- 

 pine Islands. By Paul Bartsch. Pp. 343-371, 7 pis. Apr. 1, 1933. 

 — Pt. 9. The tree snails of the genus Cochlostyla of Mindoro Province, 

 Philippine Islands. By Paul Bartsch. Pp. 373-533, 27 pis. Feb. 

 26, 1938. 



