234 Vjiiversity of Califortiia Publications in Zoology. [Vol.8 



The plate formula is 3', 0", 6", 6, 6'", li>, 1"" . Apical 1' is a slender 

 ribbon-like plate bearing the ellii^tical closing platelet at its apex and 

 passing posteriorly to junction with the oblique margin of the anterior 

 plate of the ventral area, thus parting precingulars 1" and 6". Apical 2' 

 bears an apical lobe to the right resting in a terminal excavation in 

 apical 3', which bears near its posterior end on the median margin the 

 circular ventral pore. Precingular 6" is quadrangular. Postcingular 1" 

 is minute, 1 girdle width wide and 2 in length, and posterior intercalary 

 IP is a large plate 2 to 3 girdle widths wide and 0.5 to 0.6 transdiameter 

 in length. Antapical 1"" is wholly exposed on the dorsal face. 



The surface is coarsely, regularly and heavily porulate and sparingly 

 marked with heavy longitudinal striae, about seven in dorsal view on 

 the precingular plates and a like number on the postcingular, and four 

 on the apicals. In ventral view the striae are less regular. There are 

 seven on the hypotheca and five or six on the epitheca. The girdle bears 

 two rows of marginal pores and is crossed by irregular striae. The anta- 

 pical spine is 1.5 to 2 girdle widths in length, tinned on both sides and 

 bears a basal reticulation. 



Dimensions: Length, excluding spine, ICO to llO/i,; trans- 

 diameter, 62 to 65|a; dorso-ventral diameter about the same; 

 length of antapical spine, 8 to lO/x. 



Variation : Varies in extension of apical horn, length of 

 apical spine, obliquity of postmargin, and development of tins, 

 and prominence of the pores. 



Synonomy: AlK)ut the same time that Pavillard (1909) 

 described G. kofoidi Stiiwe (1909) published a brief diagnosis 

 and a simple figure of a form he calls G. gJobosa. In his de- 

 scription he distinctly specifies an absence of parallel markings. 

 These characterize G. kofoidi. In size, however, it approaches 

 G. kofoidi, and in outline in ventral view G. pacifica, but is much 

 smaller than the latter and has a conical instead of a flattened 

 epitheca and thus approaches G. kofoidi. It occurred in several 

 collections in the North Atlantic. It is possible that it is only 

 a smooth form of G. kofoidi, and if so, it falls into the synonomy 

 of that species. Stiiwe 's figures and descriptions are not sufifi- 

 eiently diagnostic to be of much assistance. It has not been 

 possible as yet to determine the exact dates of publication of 

 Pavillard 's and Stiiwe 's papers and thus settle the matter of 

 priority. I provisionally adopt Pavillard 's name, as certainly 

 applying to the species here described, and probably having 

 priority. 



