782 PROCEEDINGS OF THE ACADEMY OF [Dec. , 



lu regard to Carinoma, I agree with the view recently advanced 

 by Bergendal (1900 b) that it is more of a Protouemerteau than 

 a Mesonemertean, for its points of agreement with the Protone- 

 raerteans are far more numerous than with Cephaloihrix. Bergen- 

 dal's suggestion to retain Hubrecht's broader order of the Palseo- 

 nemertini, including the four families of the Cariuellidce, Carino- 

 midoe, Hubrechtidse and Cephalotliricidse, seems a very excellent 

 one. This suggestion is based upon a comparative study of Carinoma 

 and upon the discovery of the interesting form Callinera burgeri, 

 a true Protouemerteau, in which the cerebral organs are absent. 



In all zoology, as our knowledge advances and more and more 

 new forms are discovered, the gaps between old and once widely 

 separated families and groups are gradually filled and the results 

 tend toward a more elastic and broader classification. 



The view is held by some zoologists that the Kemerteans, on 

 account of their general uniformity, are a comparatively recent 

 group, so that a large number of the members are probably still in- 

 existence. If this is true, we may expect some day, when our 

 present species are better known and all the intermediate forms 

 have been added to them, to see our existing lines of classification 

 laid aside, and in their place one broad comprehensive group. 



Literature. 

 [The papers not seen by the writer are marked with an asterisk.] 



1900rt. Bergendal, D. Ueber ein Paar .sehr eigeuthiimliche nordische 



Nemertioen. Zool. Am. Bd. 23, No. 617. 

 1900/^. Bergendal, D. Bor ordingen Pateow^wer^/zi/Hubrechtuppdelas i 



tvjinne ordningar Friitoiieincrtini och Mesonemertini? Kongl. 



Vetenskaps-Akad. ForhandUugar, No. 6. Stockholm. 

 1900c. Bergendal, D. Till kannedomeu om de nordiska Nemertinerna. 



Kongl. Vetenskaps-Akad. ForJuindUngar, No. 5. Stockholm. 

 1898. BOHMIG, L. Beitiiigezur Anatomie und HistologiederNemertiuerna 



(Stichostemma grsecense [Bohmig], Geonemertes chalicophora 



[Graff]). Zeit.f.Wiss.Zool. Bd. 64. 



1890. BtJRGER, O. Untersuchungen iiber die Anatomieund Histologic der 



Nemertinen, nebst Beitriigen zur Systematik. Zeit. f. Wiss. 

 Zool. Bd. 50. 



1891. BtJRGER, O. Die Enden des excretorisehen Apparates bei den Ne- 



mertinen. Zeit.f. Wiss. Zool. Bd. 53. 



1892. BtiRGER, O. Wassind die Attractionsphihen und ihreCentralkorper? 



Anat. Am. Bd. 7. 



1894. BiJRGER, O. Studien zii einer Revision der Entwicklungsgeschichte 



der Nemertinen. Ber. d. Nat. Ges. Freiburg. Bd. 8. 



1895. BiJRGER, O. Die Nemertinen des Golfes von Neapel. Flora u. 



Fauna des Golfes von Neetpel. XXII. Monographie. 



