ART. 5 BIBLIOGHAPHY OF THE COlSrODOISrTS HOLMES 29 



Genus DIPLODODELLA Ulrich and Bassler, 1926 



DIPLODODELLA BILATERALIS Ulrich and Bassler. 1926 



Plate 10, fig. 8 



1926. Diplododella hilateralis Ulrich aud Bassleb, Proc. U. S. Nat. Mus., vol. 

 68, p. 41, text, fig. 21. 



The short, narrow, blunt cusp rises from the center of a strongly 

 arched bar, both sides of which are about equal in length. The 

 median ridge, extending the whole length of the bar, divides the bar 

 into two parts which lie in different planes. Beneath the cusp there 

 is a small concave depression. The denticles, which are alike on both 

 sides of the cusp, seem to rise from the median ridge rather than 

 from the edge of the bar. Spaces ^vider than the denticles separate 

 them. The denticles themselves vary in size ; the nearer the ends 

 of the bar, the smaller and thinner tliey become. 



no7oti/pe.—Csit No. 11306, U.S.N.M. 



Genus HIBBARDELLA Ulrich and Bassler, 1926 



HI3BARDELLA CURVATA, new species 



I'late 10, tig. 



. This is a tiaralike tooth. There are five short, thick denticles 

 with blunt points on each side of a narrow but very robust bar. 

 Very wide spaces separate the denticles. The crownlike appearance 

 is helped by the curved contour of the strongly arched bar. The 

 blunt-pointed cusp is very wide, thick, and long. 

 Holotype.—Cat No. 11450, U.S.N.M. 



Genus PALMATODELLA Ulrich and Bassler, 1926 



PALMATODELLA DELICATULA Ulrich and Bassler, 1926 



Plate 10, tig. 10 



1926. PalmatodeUa delicatala Ui.kich and Passlek. Proc. U. S. Nat. Mus., vol. 

 68, p. 4, pi. 10, fig. o, text tig. 20. 



This sharply arched bar is distinctlj^ divided into two parts. On 

 one side of the long, angular cusp which has its origin in the peak 

 of the bar, the round, thick bar bears a number of short, sharp- 

 pointed and well-separated denticles. The other side has the appear- 

 ance of a flat, finely serrated palm leaf. Here the denticles gradu- 

 ally diminish in length from the very long one next to the cusp to 

 the one at the end of the bar which is so minute as to be hardly 

 distinguished from the bar itself. Spaces about the width of very 

 fine hairs separate these denticles. 



HoIotype.—CsLt. No. 11307, U.S.N.M. 



