LITERATURE OF THE PORIFERA 165 



Schulze, Metschnikott', Barrels, Keller, Schmidt, and many others ; in physiology, 

 Lieberkiihn, Metschnikoff, Lendenfeld, etc. ; for the classification and system 

 Gray, Bowerbank, Schmidt, Topsent, Lendenfeld, and Breitfuss ; and in 

 palaeontology, the works of Hinde and Zittel. Full bibliographies are given 

 by Vosmaer [29 and 30], Lendenfeld [9], Rauff [19], and Weltner [31], and 

 references to recent literature will be found in the Zoological Record, published 

 by the Zoological Society of London, and in the JSibliographia Zoologica, edited 

 by Victor Carus, and published with the Zoologischcr Anzciger (Leipzig, W. 

 Engelmann). 



1. Bidder. The Skeleton and Classification of Calcareous Sponges. (Proc. 



Roy. Soc., 64, 1898, pp. 61-76.) 



2. Delage. Embryogenie des Eponges. (Arch. Zool. Exp. (2), x. (1892), pp. 



345-498, pis. xiv.-xxi.) 



3. Sur la place des Spongiaires dans la Classification. (C. R. Ac. Sci. 



Paris, vol. cxxvi. (1898), pp. 545-548.) 



4. Dendy. Monograph of the Victorian Sponges I. (Tr. Roy. Soc. Victoria, 



III. (1891), pp. 1-81, xi. pis.) 



5. Studies on the Comparative Anatomy of Sponges, V. Calcarea Hetero- 



ccela. (Quart. Journ. Micr. Sci., N.S. vol. xxxv. (1893), pp. 159-257, pis. 

 x.-xiv.) 



6. Doderlein. Ueber die Lithoninae. (Zool. Jahrb., Abth. f. Syst. etc., x. 



(1897), pp. 15-32, pis. ii.-vi.) 



7. Haeckel. Die Kalkschwiimme. (3 vols. Berlin, 1872.) 



8. Deep Sea Keratosa. (Challenger Reports, Zool., vol. xxxii. 1869.) 



9. Lendenfeld. Monograph of the Horny Sponges. (London, 1889.) 



10. Loisel. Contribution a 1'histo-physiologie des Sponges. (Journ. de 1'anat. 



et de la physiol., xxxiv. (1898), pp. 1-43 and 186-234, pis. i. and v.) 



11. Maas. Embryonal-Entwickelung, etc. , der Cornacuspongien. (Zool. Jahrb., 



Abth. f. Anat, etc., vii. pp. 331-448, pis. xix-xxiii.) 



12. Ueber die erste Differenzierung von Generations und Somazellen bei 



den Spongien. (Verh. deutsch. Zool. Ges., 1893, pp. 27-35.) 



13. Die Keimblatter der Spongien, etc. (Zeitschr. f. w. Zool., Ixiii. (1898), 



pp. 665-679, pi. xli.) 



14. Die Entwickelung der Spongien. (Zool. Centralblatt V., 1898, 



pp. 581-599.) 



15. Ueber Reifung und Befruchtung bei Spongien. (Anat. Anzeiger, 



1899.) 



16. Minchin. The Position of Sponges in the Animal Kingdom. (Science 



Progress, N.S. I. (1897), pp. 426-460.) 



17. Materials for a Monograph of the Ascons I. (Quart. Journ. Micr. 



Sci., N.S. xl., 1898, pp. 469-587, pis. xxxviii.-xlii.) 



18. PoUjaeff. Calcarea. (Challenger Reports, Zool., vol. viii., 1883.) 



19. Rauff. Palfeospongiologie. (P-Ofeontographica, xl. pp. 1-346, pis. i.-xvii. ; 



and xli. pp. 223-272, pis. xx.-xxvi.) 



20. Ridley and Dendy. Monaxonida. (Challenger Reports, Zool., vol. xx.) 



21. Schuhe. Hexactinellida. (Challenger Reports, Zool. , vol. xxi. ) 



22. Symmetrieverhaltnisse bei ;Hexactinelliden-Nadeln. (Verh. deutsch. 



Zool. Ges., 1S97, pp. 35-37.) 

 23. - - Zur Histologie der Hexactinelliden. (Sitzber. Akad. Wiss., Berlin, 



xiv., 1899, pp. 198-209.) 



