1912] Kofoid: Sethocephalus eucecryphalus 357 
Cleve (1899), which Brandt rejects as doubtfully a ciliate. There 
is nothing in Haeckel’s (1887) brief description which makes it 
possible to determine either the radiolarian or tintinnid relation- 
ships of this species. The “‘square pores’? are suggestive of 
radiolarian affinities but the absence of collar beams and radial 
ribs strongly militates against this view. It has no resemblance 
in shape to any other known species of the Tintinnodea. Pend- 
ing the re-examination of material, Sethocephalus platycryphalus 
must therefore be left in the list of species incertae sedis. But 
the possibility of its ultimate allocation among the Tintinnodea 
should remain open. 
Transmitted, June 18, 1912. 
ZooLoGiIcAL LABORATORY, 
UNIVERSITY OF CALIFORNIA, BERKELEY. 
LITERATURE CITED 
BranptT, K. 
1906. Die Tintinnodeen der Plankton Expedition. Tafelerklarungen 
nebst kurzer Diagnose der neuen Arten. Ergebn. Plankton 
Expedition, 3, L.a. 33 pp., 70 pls. 
1907. Idem. Systematischer Teil. Ibid., 488 pp. 
4 
CLEVE, P. T. 
1899. Plankton collected by the Swedish expedition to Spitzbergen in 
1898, Svenska Ak. Handl., 32, no. 3, 51 pp., 4 pls. 
Dapay, E. von 
1887. Monographie der Familie die Tintinnodeen. Mitth. Zool. Sta. 
Neapel, 7, 473-591, pls. 18-21. 
HAECKEL, E. 
1873. Ueber einige neue pelagische Infusorien. Jenaische Zeitschr., 
7, 561-568, pls. 27, 28. 
1881. Entwurf eines Radiolarien-Systems auf Grund von Studien der 
Challenger-Radiolarien. Jenaische Zeitschr., 15, 418-472. 
1887. Report on the Radiolaria collected by H. M. 8. ‘‘Challenger’’ 
during the years 1873-1876. Rep. Sci. Results Voyage H. M.S. 
Challenger, Zoology, 18, elxxxviii + 1893 pp., 140 pls., 1 map. 
