(Sonderabdruck aus dem >Zoologi8chen Anzeiger* Bd. XXXII. Nr. 1 

 vom 23. Juli 1907.) 



On Ceratium eugrammum and its related species. 



By Prof. Ch. A. Kofoid, Zoological Laboratory, Univ. of California Berkeley. 

 """ (With 4 figures.) 



In 1859 Ehrenbergidescribed asmallspeciesof Ceratium, related 

 to C. lineatum, as Peridinium eugrammum but did not figure it until 18732 

 in a paper whose title failed to suggest its contents. This paper is not 

 cited in any of the earlier or more recent bibliographies of the Dinofla- 

 gellata except indirectly inBiitschlis Tierreich monograph. Stein 

 (1883)3 cites this species in his monograph as a synonym of C. furca, a 

 view acquiesced in there after by all other investigators. This species 

 ofEhrenberg has reappeared in subsequent literature in the figures 



1 Ehrenberg, C. G., Uber das Leuchten und iiber neue mikroskopische 

 Leuchtthiere des Mittelmeeres. Monatsber. k. preuB. Akad. Wissensch. Berlin 1869. 

 S. 727—738, 791—793. 



2 Ehrenberg, 0. Gr., Die das Funkeln und Aufblitzen des Mittelmeeres be- 

 wirkenden unsiohtbar kleinen Lebensformen. Festschrift zur Feier d. lOOjahrigen 

 Bestehens d. Gas. naturforsch. Freunde in Berlin 1873. p. 1 — 4, 1 Taf. 



3 Stein, F., Der Organismua der Infusionstiere. III. Abt. 2. Halfte. Die 

 Naturgeschichte der Arthrodelen Flagellaten. 30 S. 25 Taf. 1883. 



