580 H. P, KJERSCHOW AGBRSBOR(} 



Bergh, R. (1890a). — "Die cladohepatischen Nudibranchien ", ' Zool. 



Jahrb.', 5 : 1-75. 

 -(18906). — "Die Nudibranchien des Sunda-Meeres ", C. Semper, 



' Reisen im Archipel der Philippinen, II ', 2 : 873-991, i Taf. 

 (1880-92. — "System der nudibranchiaten Gasteropoden ", ibid., 



.3: 995-1165. 

 (1892a). — " Die Nudibranchiata holohepatica porostomata ", ' Verb. 



zool.-bot. Gesell. in Wien ', 42 : 1-16. 

 (1894). — " Reports on the dredging operations off the west coast of 



Central America to the Galapagos, to the west coast of Mexico, and in 



the Gulf of California, in charge of Alexander Agassiz, carried on by 



the U.S. Fish Commission steamer ' Albatross ', during 1891, Lieut.- 



Commander Z. L. Tanner, U.S.N., commanding. XIII, Die Opistho- 



branchien", 'Bull. Mus. C. Z. Harvard College', 25: 125-233, 



12 plates. 

 (1897). — " Ergebnisse einer zoologischen Forschungsreise in den 



Molukken und Borneo. Opisthobranchien ", ' Abh. Senckenb. naturf. 



Gesell.', 24 : 93-130, 2 plates. 

 (1902).—" Den Danske Expedition til Siam, I (1899-1900). Opistho- 



branchiata ", ' D. Kgl. Danske Vidensk. Selsk. Skrift.", 6 Rtekke, 



12 : 153-218, 3 plates and map. 

 (1904). — ■" Nudibranchiata kladohepatica (Melibe pellucida, Bergh, 



on the Columbia River, Washington) ", C. Semper, ' Reisen im Archipel 



der Philippinen ', wiss. Resultate, IX, 6 : 1-55, 4 Taf. 

 ■ (1908). — ■" The Opisthobranchiata of South Africa (Tethymelibidae) ". 



' Trans. S. Africa Phil. Soc.', 17 : 1-144, 14 plates. 

 Boas, J. E. V. (1886). — " Spolia atlantica. Bidrag til Pteropodernes 



Morfologi og Systematik samt til Kundskaben om deres geografiske 



Udbredelse. Avec resume en frangais ", ' D. Kgl. Danske Vidensk 



Selsk. Skrift.', 6 Rfekke, 4 : 1-248, 8 tavler. 

 (1920). — ' Lserebog i zoologien.' 5te udgave. 725 pp., 655 figurer. 



Nordisk Forlag, Kristiania. 

 Bonnevie, Kristine(1916). — " Mitteilungen iiber Pteropoden. I. Beobach- 



tungen iiber den Geschlechtsapparat von Cuvierina columnella. Rang ", 



' Jenaische Zeitschr. f. Naturwiss.' (N.F., 47 Band), 54 : 245-76, 4 Taf. 

 Bouvier, E. L. (1891). — " Recherches anatomiques sur les Gasteropodes 



provenant des campagnes du yacht I'HirondeUe. Rapports de I'apparei 



circulatoire arteriel avec le systerae nerveux. (Opisthobranches.) "" 



' Bull. Soc. Z. d. Fr.', 16 : 53-6. 

 Cooper, J. G. (1863). — " On new or rare MoUusca inhabiting the coast of 



California, II ", ' Proc. Calif. Acad. Nat. Sci.' (1863-7), 3 : 60. 

 Copeland, M, (1918). — " The olfactory reactions and organs of the marine 



snails Alectrion obsoleta Say, and Busy con canalicu- 



latum Linnaeus", ' Journ. Exper. Zool.', 25: 177-227. 



