THE CH.ETOGNATHA. 85 



APPENDIX. 



CHiETOGNATHA FROM THE FALKLAND ISLANDS. 



My friend Mr. Valleatin was kind enough to send me six specimens which he collected 

 at Port Stanley in 189G. Tiiey included only two species. 



Krohnia hamata, Moebius. 



A well-preserved specimen of this interesting species has been already mentioned 

 (p. 77) as completing the chain of occurrences required by Chun's theory of the con- 

 tinuity of the subarctic and subantarctic Plankton through the trojiical Mesoplankton. 

 The specimen, from between the surface and 6 fathoms, was about 18 mm. long, with 

 at least 8 jaws and 11 teeth ; the exact numbers could not be given without damaging 

 the specimen, as both jaws and teeth were turned strongly inwards in conti'action. 



Sagitta serratodentata, Krohn. 



There were five specimens, from the surface to 6 fathoms, quite indistinguishable from 

 the Biscayan specimens and agreeing with them in numbers. 



Length. Tail as p.c. of j Anterior Posterior 



mm. total length. ' teeth. teeth. 



9 33 6 2-3 3 



15 26 7 8 7-8 



This species has already been recorded from the subantarctic region, obtained by 

 the Hamb. Magalhaens. Expedition (Steinhaus). 



Literature. 



A list of tlie literature of Chaetognatha was published by Strodtmanu : — " Die Syste- 

 matik der Chaetognathen," Archiv fiir Naturgeschichte, Iviii. p. 333. This was supple- 

 mented by Steinhaus, ' Die Verbreitung der Chtetognathen im siidatlantischen und 

 indischen Ozean,' Inaug. Diss. Kiel, 189G. Siuce then the following papers on the 

 system of Chtctognatha have appeared : — 



T. AiDA.— '' Chffitognaths of Misaki Harbour." Aniiot. Zool. Japon. i. p. 13 (1897). 



L. DoNCASTER. — " Cha;tognatha." Fauna and Geog. Maldive aiul Laccadivc .Vrchipclagoes, i. p. 209. 



T. Krumbach.— " Ueber d. Grcifhaken d. Cliiitognathen." Zool. Jalirb. (Abth. Syst. &c.) xviii. p. 579 



(1903). 

 0. Steinhaus. — " Chaetognathen," in Hamburg. Magalhaens. Sammelrcise, Lief. v. (1900). 



