THE ANiNALS 



AND 



MAGAZINE OF NATURAL HISTORY. 



[SIXTH SERIES.] 

 No. 105. SEPTEMBER 1896. 



XXXII. — Notes on the Chcetognaths. 

 By F. S. CONANT *. 



The following notes are based in part upon observations made 

 at Beaufort, N. C, during the summer of 1895, and in part 

 upon later work on preserved material. That which concerns 

 the egg-laying rests wholly on one form, Sagitta Mspida^ a 

 species very much like the Sagitta hipunctata of European 

 writers, which was described by me in the * University 

 Circular' for June 1895 (no. 119) f. With the exception of 

 Sagitta hisjnda and another form, Spadella schizoptera, 

 described in the same article, the Ghaetognaths of American 

 waters have not been subjected to the European standards of 

 classification, and in the systematic part of this paper an 

 attempt has been made to describe, as accurately as alcoholic 

 material would allow, such of the American Chgetognaths as 

 have come into the writer's hands. 



I. Egg-laying. 



So far as is revealed by a search of the literature, the 

 passage of the ova into the oviducts has not been actually 



* From the 'Johns Hopkins University Circulars' for June 1896, 

 pp. 82-85. 

 t Reprinted in the ' Annals ' for 1895, vol. xvi. p. 288. 



Ann. do Mag. N. Bist. Ser. 6. Vol. xviii. 14 



