300 CONTRIBUTIONS PROM THE NATIONAL BEB BARIUM. 



Den Ehrenb. Ber. Akad. Wise Berl. L840: 204 1841. 



S< linii'li. A t la- pi. ! .'.'./'. W 

 I 1 Toni, S>11. A! 1894 



Thia well-known and variabL - met with in large quantities at some of the 



Btations, especial!} at stations 2844 and 3361H. Al Btation 3569H il is present, but 

 very rare. A minute and strongly divergent variety occurs at Btation 1029H, which 

 i- the same as that figured in Schmidt's Atlas, plate L22, figures 10 to 12, and named 

 S( hmidt. There can be no reasonable doubt of this being H. aurita if 

 ;m1 examination is made of its many varieties, or even if, taking Schmidt's own 

 figures, we compare figure 2 and figure 7 with figure 12, and also figure 8 with figures 

 L0 and II in plate L22. De Toni not only accepts them as specifically distinct, but 

 assigns them to separate genera. See the citations abo 



Found at Btations 2287H, 2690H, 2844, 2848, 2869, 2882, 2920H, 336 1H, 3569H, 

 31 ■ ".11. 3671H, 31 S8B 36 'ill I692B 3694H, 3704H, 3912H, W13H, Mil ill. It 

 off centra] California to Bering Sea and eouth to Bonshu and Hawaiian islands. 



Biddulphia biquadrata Jan.) Boyer, Proc. Acad. Phila. 1900: 717. L901. 



an btquadratum Jan.; Schmidt, Atlas pi. 98./. i 6, pi. 99. f. :'• :<■. L886. 

 Jan. < raz. Exped. pi. i t.f. / 

 I include figures 25 and 26 in Schmidt's Atlas, plate 99, as they are certainly the 

 Bame Bpecies as that figured in plate 98. Both come from the Gazelle Expedition. 

 mnctum Schmidl " is very close to the above. 

 Found at Btation 2807, Galapagos Islands. 



Biddulphia consimilis Grun. Boyer, Proc. Acad. Phila. 1900: 7<>!». L901. 



Rrict atxum consvmiU Grun.; Van Heur. Synop. pi. 108^f. .'. L881. Schmidt, 

 Atlas pi L885. 



The above figures need to be taken together. Schmidt'e representation of the 

 genera] form is excellent, bul his figure and description of the secondary markings 

 are wrong. < irunow's own figure cited above Bhows that these are not a central nodule 

 surrounded by a faint circle, bu1 a centra] nodule and a row of bright bead-like 

 puncta close to and parallel to the walls of the hexagons. The nodule and the 

 puncta are in two planes of focus, bo that when the nodule is distincl the row of 

 puncta assumes the appearance of a ring. Hence Schmidt's mistake. 



Found at station 2807, Galapagos Islands. 



Biddulphia culcitella Mann. Bp. nov. Plate XIA'l. in.i re 3. 



Valve rectangular, the four sides sharply concave; the four horns or proc 

 narrow and Blightly prolonged beyond the border line; markings of beading, evenly 

 and finely distributed over the entire valve in rows radial from the center, where >ix 

 or eight beads are loosely grouped to form an indistinct rosette; valve surface very 

 slightl) convex until close to the margin, where it curves rapidly downward to the 

 rib'bed border; all specimens are marked with two Bets of strong hyaline ridges, one 

 forming a circle about the center with a diameter of one-half that of the valve, the 

 ( . i her .-ei consistingof two parallel ridges proceeding backward from the base of each 

 of the four processes for a short distance, about one-eighth the diameter of the valve, 

 where they separate at right angles and end at the margin. 



Diameter of valve (between two apices), 0.081 mm. 



Type in the U. S. National Museum , No. 590136 from station 2807, Galapagos 

 Islands, April I. i sss : 812 fathoms, bottom of Globigerina ooze and coral mud. 



This form is of the "Amphitetras]" type, and would be classed by Borne authors in 

 thai genus here united with Biddulphia) and by others in Triceratium, from which 

 these Biddulphia forms are hen- removed. 



aSchmidt, Atlas pi 98. / / 5, 19. L886. 



