218 University of California PuhJications in Zoology. [Vol.8 



placed (3 to 6 girdle widths) girdle with little overhang, longi- 

 tudinal furrow not abruptly widened opposite distal end of 

 girdle. Apical 4' separable. Reticulate surface with wide reticu- 

 late intercalary bands. 



Description: Body elongate-spheroidal, its length nearly 1.2 trans- 

 diameters, slightly flattened on ventral face. Epitheca exceeds hypotheca. 

 Epitheca contracted to stout apical horn 2 to 4 girdle widths in height 

 and 3 to 4 across at the base and 1.1 to 2 at the apex, with broadly and 

 regularly rounded shoulders, its greatest altitude 0.85 transdiameter, 

 flaring a little at the girdle. Hypotheca also flaring at girdle, its greatest 

 altitude 0.6 transdiameters, antapex wide but very broadly rounded bear- 

 ing two or three short, stout, close-set sinues. 



The girdle is equatorial, descending, displaced distally 3 to 6 girdle 

 widths, and with rarely more than 1 of overhang. Furrow very deeply 

 impressed with salient heavy ridges of thecal wall. In ventral view 

 both portions appear curved, the distal one sweeping in a regular curve 

 (pi. 13, fig. 24) from the margin posteriorly so that its distal end lies 

 nearly midway between the proximal end and the antapex. It is thus 

 one of the most widely displaced girdles in the whole genus. 



The ventral area or longitudinal furrow is spoon-shaped with slight 

 irregularities in its course. It is nearly closed by lateral compression 

 between girdle ends and flares posteriorly to a maximum width of four 

 girdle widths, rounding at the postmargin which indents the antapical 

 slightly. It is guarded by fins on either side, each at times (pi. 13, fig. 24) 

 with a few heavy ribs. There is no marked expansion as in G. spinifera 

 opposite the distal end of the girdle. Anteriorly the ventral area indents 

 the epitheca for a distance of about three girdle widths ending in a 

 rounded margin, a girdle width across, which abuts directly against the 

 posterior end of the midventral apical 1'. 



Plate formula 4', 0", 6", 6, 6'", IP, 1"". The apical series consists of a 

 midventral apical 1', a very slender jilate with sinuous sides to whose 

 apex is attached a much elongated, curved, concave, elliptical closing 

 platelet (pi. 13, fig. 22, and cf pi, figs. 23 and 24). This platelet extends 

 a trifle beyond the apex upon the dorsal side as in the subgenus Steiniella 

 and is marked with a marginal row of pores. Plate f has the upper end 

 carried around to the right beyond the middorsal line as in many other 

 species (G. triacantha, pacifica, digitale) of this genus. The third plate, 

 3', just barely touches the apex in a point adjacent to £', the remaining 

 part of the apical margin being occupied by a small plate, 4' (pi. 13, 

 fig. 23), apparently cut out of the top of plate 3' by a curved suture. 

 This suture line is not prominent and separates with difficulty as do also 

 the other sutures on this shoulder of the theca. It has been separated, 

 however, several times in my material. A region similar to plate 4' 

 is suggested by surface markings in G. spinifera and is marked off in 

 several other species, for example, in G. polygramma, but it is not separ- 

 able in them. The median margins of plates 3' and 4' are in contact 

 with plate 1' and the anterior angle of the former bears the ventral pore 



