KONGL. SV. VET. AKADEMIENS HANDLINGAR. BAND. 19. N:0 4. 9 



1875: Ophmridce, Astrophytidce by Ltman. illustr. Catalogue Mus. compar. zool. 

 Harvard College N:o 8. 2. 



1876: Actinology of tlie Atlantic Ocean by G. Lindström. Kgl. Vet. Ak. Hand- 

 lingar (N. S.) 14, N:o 6. 



1877: Hydroida by George Allman: Mem. Mus. comp. zool. Harvard Coll. 5, N:o 2. 



1878: Echini by Agassiz, Corals and Crinoidece by Pourtales, Ophiuridcn by Ly- 

 MAN : Bull. Mus. conip. zool. Harvard College 5, N:o 9. 



1879: Hydroida by S. F. Clarke: Bull. Mus. comp. zool. Harvard College 5, 

 N:o 10. 



In 1868 Professor Fr. A. Smitt and Dr. A. Ljungman were fortunate enough to 

 be authorized to accompany as naturalists His Swed. Maiesty's ship »Josephine» on her 

 cruise in the Atlantic. At several stations, particularly off the Azores, tliey succeeded, 

 withtheir most simple apparatus and without steam, in toucliing the bottom with the dredge 

 at from 700 to 900 fathoms. Their extensive collection incorporated with that of the 

 .State Museum at Stockholm contains a great many interesting and highly developed 

 Reticularian Rhizopods. I have availed myself of this collection in studying the Ca- 

 ribbean forms. 



To acknowledge my great obligations to a few gentlemen for their assistance in 

 the preparation of this paper is to me only a pleasant duty. 



To Professor S. Loven I am greatly indebted for the liberality, with which he 

 placed the collections of the State Museum at my disposal for examination as ako for 

 his generous, instructive and encouraging support throughout the course of the work. 



Thanks to the able and disinterested painstaking of my esteemed friend Professor 

 G. Lindström I have obtained ample information concerning much of the multifarious 

 and scattered literature on the subject. 



To my learned and sensible friend J. A. Ahlstrand, Custos of the library of the 

 Royal Academy of Sciences, it is but due that I should render thanks for his obliging 

 and unwearied assistance in amply furnishing me with such papers and books as 

 were required. 



K. Vet. Akad. Handl. Band. 19. N:o i. 



