BIBLIOGRAPHY OF CEPHALODISCUS. 63 



females with two testes and two ovaries respectively. There is no sexual dimorphism 

 such as occurs in the case of C. sibogae (Harmer) ,• the three kinds of polypides 

 — males, females and hermaphrodites — are indistinguishahle externally, except in so 

 far as the ducts of the testes do not as a rule possess the red pigment that 

 occurs in the oviducts (pp. 45-47 and pp. 57-59). 



8. The mode of development of the buds of C. nigrescens and C. hodgsoni 

 is considered (pp. 47-49 and pp. 59-62). 



9. The clear refractive beads found in the end buUjs of the plumes of C. hodgsoni 

 are regarded, not as rhabdite-cells, but as the material of the tubarium in process 

 of secretion, after the manner of the globules of mucus in a goblet-cell (pp. 56-57). 



BIBLIOGRAPHY UF CEPHALODISCUS. 



1. Andeessou, K. a. — " EiiiL' AViederentdeckung von Cifhalodiscus.''' Zool. Aiizeiger, xxvi. (1903), 



pp. 368-3G9. 



2. Cole, F. .J.—" Ou the Discovery and Development of Rliabdite-' cells ' in Cephalodiscus dodecalophvs." 



Journ. Linn. Soc. Zool., xxvii., pp. 2.5G-2G8 (1809), one plate. 



3. Delage, Y. ct Heeouard, B. — Traite de Zoologie Concrete, v., Paris (1897), pp. 171-181 ; also viii., 



(1898), pp. 331-333. 



4. Ehlees, E. — "Zur Kenntniss der Pedicellineen." Abhandl. k. Gesellsch. Wiss. Gottingeii, xxxvi., 



Phys. Klasse, 1889 (1890), pp. 20(i, five plates. (Discusses structure and affinities of Ccp/ialodiscus 

 pp. 11)4 et scq.) 



5. Fowler, G. H. — Article " Hemicliorda." Eiicycl. Britann., Ed. lit, xxix., 19(i2, pp. 249-2.J2. 



6. IIaemer, S. F. — Appendix to Report ou Cephalodiscus. 'Challenger' Reports, Zool., xx., pt. Ixii. 



(1887), i)p. 39-47, four text-figures. 



7. Haembe, S. F.— " On the Notochord of Cephalodiscus.'' Zool. Anzeiger, xx. (1897), pp. 312-346. 



8. Haemer, S. F. — "Ou new localities for Cephalodiscus.'" Zool. Anzeiger, xxvi. (1903), pp. 593-594. 



9. Haemer, S. F.— Article " Hemichordata." Cambridge Natural History, vii. (1904) (Pterobranchia, 



pp. 21-27). 



10. Haemee, S. F. — "The Pterobranchia of the Siboga Expedition, with an Account of other Species." 



Resultats des Explorations a hord du Siboga. Livr. xxii., Monogr. xxvi. lis; Leiden (1905), 

 pp. 132, 14 plates and two text-figures. 



11. Kemna, a. — "L'origiue de la corde dorsale." Ann. Soc. Roy. Zool. et Malacol. Belgique (Bull, des 



Seances), xxxix. (1904), pp. 85-157 (Author's reprints, pp. 1-73). 



12. Lang, A.- — "Zum Verstiindniss der Organisation von Cephalodiscus dodecalophus." Jen. Zeitschr., 



XXV. (1890), pp. 1-12, no figures. 



13. Lankester, E. R. — "A Contribution to the Knowledge of RhaMopkura." Quart. Journ. Micro. 



Sci., n. s., xxiv. (1884), pp. G22-G47, five plates. (Contains a few allusions to Cephalodiscus.) 



14. Lankester, E. R.— Article " Polyzoa." Encycl. Britann., Ed. 9, xix., 1885, pp. 429-441. (Contains 



the first published figures of Cephalodiscus; they were made from drawings supplied by 

 Prof. M'Intosh.) 



U 



