INDEX BIBLIOGRAPHIQUE 



METALNIK.OFF, 1900. Sipunculus nudus (Zeit. f. wiss. Zoo/., Bd. LXVIII, p. 261). 

 MULLER (MAX.), 1852. - Observationes anatomica? de Vermibus quibusdam 



maritimis (These de Berlin, p. 14). 

 PAUL, 1910. Ueber Petalostoma minutum Keferstein und verwandte Arten 



(Zoo/. Ja/irb., Abt/t. f. Anat., Bd. XXIX, p. 1). 



QUATREFAGES (DE), 1865. - - Histoire naturelle des Anneles, t. II, p. 563. 

 RIETSCII, 1886. - - Etude sur les Gephyriens armes ou Echiuriens (Rec. Zoo/. 



Suisse, t. Ill, p. 313). 

 SELK.NKA, 1875. - - Eifurchung und Larvenbildung von Phascolosoma elongatum 



Kef. (Zeit. f. wiss. Zoo/., Bd. XXV, p. 442).' 

 Id., DE MYN et BULOW, 1883. - Die Sipunculiden (Semper s Reisen im Ar- 



clnpcl der Pliilippinen, 2" Th., Bd. IV, 1 Abth.l. 



Id., 1897. Die Sipunculiden-Gattung Phymosoma (Zoo/. Anz., Bd. XX, p. 460). 

 SHIPLEY, 1896. Gephyrea (The Cambridge Natural History , vol. II, p. 411). 

 Id., 1899. On a collection of Echiurids, etc.. with a attempt to revise the 



group and to determine its geographical range (Willey Zoological results, 



part III, p. 335). 

 SOUTHERN, 1913. -- Gephyrea of the coasts of Ireland (Fisheries Ireland, Sci. 



Invest., n III). 

 SPEJXGEL, 1880. - - Die Organisation des Echiurus Pallasii (Zeit. f. wiss. Zoo/., 



Bd. XXXIV, p. 460). 

 Id., 1912. -- Beitrage zur Kenntnis der Gephyreen. IV. Revision der Gattung 



Echiurus (Zoo/. Jahrb., Abt/t. f. Syst., Bd. XXXIII, p. 173). 

 Id., 1912. - - Einige Organisationsverhaltnisse von Sipunculusartcn, etc. (Ver- 



liandl. d. deutsch. Zoo/. Gcs. , p. 261). 



Id., 1913. Sipunculidea (Handworterbucfi der Naturwiss., Bd. IX, p. 97). 

 Id., 1913. Zur Organisation und Systematik der Gatfung Sipunculus (Ver- 



handl. d. deutsc/t. Zoo/. Ges., p. 68). 

 THEEL, 1875. - - Recherches sur le Pliascolion strombi (Mont.) (Kungl. Svenska 



Vel.-Akad. Handlingar, t. XIV). 



Id., 1905. Northern and arctic Invertebrates. I. Sipunculids (ibid. A. XXXIX). 

 Id., 1906. Northern and arctic Invertebrates. II. Priapulids, Echiurids, etc. 



(Kungl. Svenska Vet.-Akad. Handlingar, i. XL). 

 Id., 1911. Priapulids and Sipunculids dredged by the Swedish Antarctic 



Expedition {Kungl. Svenska Vet.-Akad. Handlingar, t. XLVII). 

 VOGT et YING, 1888. Classe des Gephyriens (Traite d'Anatomie comparee 



pratique, t. I, p. 372). 

 WARD, 1891. On some points in the anatomy and histology of Sipunculus 



nudus (Bull. Mus. comp. Zoo/. Harvard Coll., i. XXI, p. 143). 

 WILSON (On. B.), 1900. - - Our north American Echiurids (Biol. Bull., t. I, 



p. 163). 



