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Kowalevski, A. 



'71 Embryologische Studhen an Wiirmern und Arthropoden. Mem. d. Ac;\d. 

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 Krumbach, Th. 



'03 Ueber die Greifhaken der Chaetognathen. Zool. Jahrb. Abth. f. Syst., Bd. 

 18, pp. 579-646, Figs. A-U. 



Langerhans, P. 



'78 Das Nervensystem der Chaetognathen. Mb. Ak. Berlin, Jahrg. 1878, pp. 

 189-193. 



Leidy, J. 



'82 -Sagitta falcidens. Ann. Mag. Nat. Hist., Ser. 5, Vol. 10, pp. 79-80. 

 Steinhaus, 0. 



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Inaug. Diss., Kiel, 49 pp., i Taf. , 2 Kart. 

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 Stevens, N. M. 



'04 On the Ovogenesis and Spermatogenesis of Sagitta bipunctata. Zool. Jahrb. 



Abth. f. Anat. u. Ontol., Bd. 18, pp. 227-240, Taf. 20-21. 

 '05 Further Studies on the Ovogenesis of Sagitta. Zool. Jahrb. Abth. f. Anat. 

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 Strodtmann, S. 



'92 Die Systematik der Chaetognathen und die geographische Verbreitung der 

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Thompson, D. A. W. 



'85 A Bibliography of the Protozoa, Sponges, Ccelenterata, and Worms for the 

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'71-2 Report on the Invertebrate Animals of Vineyard Sound and Adjacent Waters. 

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'79 Invertebrata of the N. E. Coast of North America. Proc. U. S. Nat. Mus., 

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'83 Results of the Explorations Made by the Steamer "Albatross " oft" the North- 

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