356 University of California Publications in Zoology  [Vou.9 
A comparison of the figures in question will convince anyone 
familiar with pelagic organisms that Haeekel (1887) and Brandt 
1906-1907) are dealing with the same species and an inspec- 
tion of Brandt’s beautiful plates will be equally convincing that 
the organism in question is not a radiolarian but the tintinnid 
which Brandt names Cyttarocylis plagiostoma Haeckel var. e¢. 
Bat. 
In connection with the examination of the plankton at San 
Diego I have seen this species a number of times and am con- 
vinced that it is a shell of a tintinnid. It has the filled mesh- 
work as figured by Brandt and not the open net as in Haeckel’s 
figure. I have recorded the species, in connection with Cytaro- 
cylis cassis Haeckel, from collection No. 862, vertical haul with 
No. 20 silk net from 85 fathoms on Cabral’s Banks, about ten 
miles off shore at San Diego, January 4, 1904. The catch con- 
taining this species was of mixed neritic and typical oceanic 
material, containing besides a small number of trieyrtid Radio- 
laria, Tintinnus lusus undae, Ceratium candelabrum var. dila- 
tatum, C. gibberum, C. gallicum, C. claviger, C. inflerum, Am- 
phisolenia palmatum, and Planktoniclla sol. The facies of the 
collection was distinctly semi-tropical. 
Brandt (1907) also reports the species from the Florida Cur- 
rent, Gulf Stream, Sargasso Sea, the Northeast Trades, South 
Equatorial, and the Indo-Pacific region. It has a predominantly 
tropical distribution. 
The nomenclatural status of the organism is modified by the 
discovery that Haeckel’s description is applicable. This ante- 
dates Daday’s (1887) paper of the same year, and Haeckel’s 
name eucecryphalus therefore takes precedence over plagiostoma 
as the specific name of the organism, and Entz’s Cyttarocylis 
cassis var. plagiostoma, and Brandt’s C. plagiostoma fall into 
its synonomy. 
Haeckel includes one other species in his genus, to wit, Setho- 
cephalus platycryphalus. This is not figured and is described 
as having a thorax (— collar, if a tintinnid) three to four times 
as broad as the cephalis (= bowl, if a tintinnid). This wide 
expansion of the collar is unknown among the Tintinnodea 
except in the insufficiently known genus Fungella described by 
