46 



About the relation with Chaetoderma nothing- can as yet be determined, which might 

 be expected from all I have told of its radula. The relation with Myzomenia of which Thiele 

 makes mention, can no more be demonstrated lor Chaetoderma, on account of its very com- 

 plicated radula. 



In the preceding pages I have tried to explain the different relations of the Neomeniidae ; 

 for phylogeny my scheme is of no value of course. Perfect certainty can be obtained only 

 after repeated and close investigations of the known forms and of new ones which will probably 

 be discovered. In this respect the rich collection, brought back by the Siboga-Expedition, may 

 be considered an important extension of our knowledge of the Solenogastres. 



LITERATURE REFERRED TO '). 



i. A. A. W. HüBRECHT. Proneomenia Sluiteri, gen. nov. and spec. nov. Nied. Arch. f. Zool. 1881, 

 Suppl. 1—75. 



2. A. KOWALEVSKV and MARION. Contributions a 1'histoire des Solenogastres on Aplacophores. Ann. du 



Mus. d'Hist. Nat. de Marseille. Zoölogie Tom. III, 1S87. 



3. A. A. W. HÜBRECHT. Dondersia festiva, nov. gen. nov. spec. Donders-feestbundel. 1888. 



4. G. PRUVOT. Sur 1'organisation de quelques Néomeniens des cótes de France. Arch. de Zool. Exp. 



Serie II, Tomé IX, 1891. 



5. G. HEUSCHER. Zur Anatomie und Histologie der Proneomenia Sluiteri. Jen. Zeitschr. für Naturw. 



Bd. XXVII, X. F. XX, 1892. 

 6a. A. WlRÉN. Studiën uber die Solenogastres. I Kongl. Svenska Vet. Ak. Handl., Band XXIV, n°. 12, 1891. 

 6b. II Bd. XXV, n n . 6, 1892. 



7. H. SlMROTH. Alollusca in Bronn's Klassen und Ordnungen des Thierreichs. Leipzig, 1893. 



8. J. THIEI.E. Beitrage zur vergl. Anatomie der Amphineura. Z. f. wiss. Zool. Bd. LVIII, 1894. 

 9. Zwei Australische Solenogastren. Zool. Anz. Bd. XX, 1897. 



10. G. PRUVOT. Sur deux Néomeniens nouveaux de la Mediterranée. Arch. de Zool. Exp. Serie III, 



Tomé VII, 1899. 



11. J. Thiele. Proneomenia thulensis in Fauna arctica Romer und Schaudinn. Bd. I, 1900. 



12. P. Pelsexeek. Les Néomeniens de 1'Expédition antarctique beige et la distribution géographique des 



Aplacophora. Buil. de 1'Acad. roy. de Belgique, n". 9 — 10, pag. 528 — 534, 1901. 



13. A. KoWALEVSKY. Sur Ie genre Chaetoderma. Arch. de Zool. Exp. et Gen. 3 me Serie, Tomé IX, 1901. 



1) For completeness' sake I may here yet mention the other publications concerning Solenogastres, which I have had no 

 occasion to refer to in the text. 



S. I OVl .. Chaetoderma, ett nytt masksliigte. Oefvers. K. Vet. Ak. Förhandlgr. Stockholm 1844. 



T. TüLLBERG. Neomenia, a new genus of Invertebrate Animals. Bih. till. K. Svensk. Vet. Akad. Handl. Bd. III, n° 13, 1875. 



I GRAFF. Anatomie des Chaetoderma nitidulum Lov. Zeitschr. f. wiss. Zool. Bd. XXVI, 1876. 



Xeomcnia, Proneomenia und Chaetoderma. Zeitschr. f. wiss. Zool. Bd. XXVIII, 1 S 7 7. 



< ,. Vrmauer Hansen. Anatomisk Beskrivelse af Chaetoderma nitidulum. Xyt. Mag. f. Xaturvid. Bd. XXII, 1877. 



I.i i ■; and DaNIELSSEN. Descriptions of new species belonging to the genus Solenopus, with some observations on their organisation. 



Ann. Mag. Xat. Hist. 5 Serie III, 1S79. 

 A. Kowalevsky et A. F. Marion. Etudes sur les Neomenia. Zool. Anz. Bd. V, 1882. 



F. SELENKA. Gephyrea. Challenger-Report. Zoology XIII, 1SS5. 



1. \i;mai],k HaNSEN. Neomenia, Proneomenia und Chaetoderma. Bergens Museums Aarsberetning. 1888. 



G. PRUVOT. Sur Ie développement d'un Solénogastre. Compt. rend. CXI, 1890. 



