THE SIPHONOPHOEA. 357 



QuoY, J. R. C, et Gaimard, P., 1834. — 'Voyage de decouvertes de 1' Astrolabe &c de M. J. 



Dumont D'Urville.' Zoologie. Paris, torn. iv. 390 pp., Atlas Zool., torn. ii. Zoophytes, 26 pis. 

 Rosier, F., 1902. — ' Die Siphonophoren.' Fauna Arctica, Bd. ii. part 4, pp. 169-184. 

 Sars, M., 1846. — Fauna littoralis Norwegise. Cliristianiaj Heft i. 94 pp., 10 pis. 

 Schneider, K. C, 1898. — " Mittlieilungeu iiber Siphonoplioren. — 3." Zool. Anz. Bd. xxi. pp. 51-57, 



73-95, 114-133, 153-173, 185-200. 

 Vanhoffen, E., 1906. — " Siplionophoren." Nordisches Plankton, Lief. v. Tail 11, pp. 10-39. 

 VoGT, C, 1851 a. — " Ueber die Siphonophoren." Zeit. wiss. Zool. Bd. iii. pp. 522-525, Taf. 14. 



, 1851 h. — Zoologische Briefe, &c. Frankfurt. Vol. i. 



, 1854. — " Recbercbes sur les Animaux inferieures de la Mediterranee. — 1. Sur les Siphouo- 



phores de la Mer de Nice." Mem. lust. Nat. Gen6v. vol. i. pp. 1-164, 21 pis. 

 Will, 1844. — Horae Tergestinre .... Leipzig, iv & 86 pp., 2 pis. 



EXPLANATION OF PLATE 28. 



Reference letters. 



Br. Bract. 



C\ C% C\ C\ Bracteal canals. 



C.D.R., C.D.L. Right and left dorsal somatic 



canals. 

 C.A. Ascending somatic canal. 

 C.H.R., C.H.L. Right and left hydrcecial canals. 

 C.Ra. Radial canal of the nectosac. 



H. Hydroscium. 



N.S. Nectosac. 



R\ R\ R\ Braoteal ridges. 



R.D., R.V., R.L. Dorsal, ventral, and lateral 



ridges. 

 SO. Somatocyst. 



Figs. 1-4. Nectopyramis thetis, sp. nov. 



Fig. 1. Somewhat oblique lateral view. The heavy dotted line indicates the position of the basal portion 



of the stem. From a slightly retouched photograph, x 6. 

 Fig. 2. Dorsal view. From a slightly retouched photograph. x 6. 

 Fig. 3. Bract, dorsal aspect. From a camera lucida drawing, x 35. 

 Fig. 4. Bract and gonophores. Slightly oblique lateral view. From a retouched photograph. 



X about 35. 

 Fig. 5. Diphyes fuwlerij sp. nov. Lateral view. Based on a camera lucida drawing, x about 10. 



SECOND SERIES. —ZOOLOGY, VOL. X. 57 



