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 indistinguishable 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). 
are 
9. The clear refractive beads found in the end bulbs of the plumes of C. hodgsoni 
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). 
13. 
14. 
BIBLIOGRAPHY OF CEPHALODISCUS. 
AnpErsson, K. A.—“ Hine Wiederentdeckung von Cephalodiscus.” Zool, Anzeiger, xxvi. (1908), 
pp. 868-369. 
. Couz, F. J.—‘“ On the Discovery and Development of Rhabdite-‘ cells’ in Cephalodiscus dodecalophus.” 
Journ. Linn. Soc. Zool., xxvii., pp. 256-268 (1899), one plate. 
DexaceE, Y. et Htrovarp, E.—Traité de Zoologie Concrete, v., Paris (1897), pp. 171-181; also viii., 
(1898), pp. 331-333. 
. EHLERS, E.—“ Zur Kenntniss der Pedicellineen.” Abhandl. k. Gesellsch. Wiss. Gottingen, xxxvi., 
Phys. Klasse, 1889 (1890), pp. 200, five plates. (Discusses structure and affinities of Cephalodiscus 
pp. 164 et seq.) 
Fowner, G. H.—Article “ Hemichorda.” Encycl. Britann., Ed. 10, xxix., 1902, pp. 249-252. 
. Harmer, 8. F.—Appendix to Report on Cephalodiscus. ‘Challenger’ Reports, Zool., xx., pt. Lxii. 
(1887), pp. 89-47, four text-figures. 
. Harmer, 8. F.— On the Notochord of Cephalodiscus.” Zool. Anzeiger, xx. (1897), pp. 342-346. 
Harmer, 8. F.—‘ On new localities for Cephalodiscus.” Zool. Anzeiger, xxvi. (1903), pp. 598-594. 
Harmer, 8. F.—Article “ Hemichordata.” Cambridge Natural History, vii. (1904) (Pterobranchia, 
pp. 21-27). 
Haruer, 8. F.—* The Pterobranchia of the Siboga Expedition, with an Account of other Species.” 
Résultats des Explorations 4 bord du Siboga. Livr. xxii., Monogr. xxvi. dis; Leiden (1905), 
pp. 182, 14 plates and two text-figures. 
Kemna, A.—“ L’origine de la corde dorsale.” Ann. Soc. Roy. Zool. et Malacol. Belgique (Bull. des 
Séances), xxxix. (1904), pp. 85-157 (Author’s reprints, pp. 1-78). 
Lane, A—* Zum Verstindniss der Organisation von Cephalodiscus dodecalophus.” Jen. Zeitschr., 
xxv. (1890), pp. 1-12, no figures. 
LanKester, E. R.—*‘ A Contribution to the Knowledge of Rhabdopleura.” Quart. Journ. Micro. 
Sci., n. s., xxiv. (1884), pp. 622-647, five plates. (Contains a few allusions to Cephalodiscus.) 
Lanxester, E. R.—Article “ Polyzoa.” Encycl. Britann., Ed. 9, xix., 1885, pp. 429-441. (Contains 
the first published figures of Coephalodiscus; they were made from drawings supplied by 
Prof. M’Intosh.) 
U 
