1877.] dovigé 
[Cope. 
Measurements. M. 
Depth of maxillary behind ‘condyle... 2.0... .63...5. 047 
a & at CaN Ais ebatecaistareeic' so, soir . 053 
fs aE eR POPUL AE Vte 2 aces S: a8 2) vin acsel oeensats tein ore seiko 069 
Length Js rg 0018 Ke CE See one GEC Ae eet sO 
Koumiuncionalemaxillaries ime... e cee: coe se. 020 
This species is dedicated to my friend Prof. G. Brown Goode, of Middle- 
ton, Conn., collaborator of the Smithsonian Institution. 
I may here state that another very distinct species of this genus is the 
Ichthyodectes arcuatus (Portheus accuatus Cope. 4to Report U. 8. Geol. 
Surv. Terrs. II. p. 204). It is characterized by the attenuation of the bones 
of the face, and jaws, and the small size and large number of its teeth. 
Those of the maxillary bone are so small as to become obsolete on the 
posterior half in old individuals. . 
ICHTHYODECTES ACANTHICUS sp. nov. 
The smallest species of the genus, distinguished by the attenuated and 
curved crowns of the teeth. It is represented in my collection by portions 
of the dentary, parasphenoid, and other bones. The teeth on the anterior 
part of the dentary bone are nearly round in section, and their enamel is 
smooth. The crowns are curved inwards towards the apices, which are 
slender and acute. ‘The anterior tooth is on the extremity of the dentary. 
The lateral processes of the parasphenoid are wide and flat, and are pierced 
at the base by the usual two foramina. The interorbital portion of the 
bone is concave in the section of its inferior surface. 
Measurements. M. 
eneihyotethexcrowi OL astOOUl fj. sure c1aierebrae eye eer be 005 
Diameter ‘‘ yy Sa Wb RO oa lesoe Sein cageceovarttaae 001 
MMe MIANGLDWAr) C6GbH I ccts' a 'si~ 0s vive sed oedclaee Mae. 012 
Width of parasphenoid at middle........... J acepd hayopeyases 006 
Depth of parasphenoid at middle,........... Livesey C004 
This species and the last described were obtained by my assistant, Chas. 
H. Sternberg, from the chalk of the Cretaceous No. 3 of Kansas. 
ORICARDINUS TORTUS gen. et sp. nov. 
Char. gen. Teeth inserted in shallow aveoli, with the roots more or 
less exposed ; on the posterior half of the maxillary bone unequally so, so 
as to be pleurodont. The anterior part of the maxillary bone depressed, 
with superior articular facet, and united with the premaxillary by a ging- 
lymus. 
This genus is apparently nearly allied to Pachyrhizodus as I have de- 
fined it. In that genus the anterior maxillary teeth are strongly pleuro- 
dont, and the maxillo-premaxillary suture is squamosal. To Oricardinus 
must probably be referred the P. sheareri m. 
Char. specif. This is derived from a right maxillary bone and a num- 
PROC. AMER. PHILOS. SOC. xv1I. 100. W. PRINTED NOY. 20, 1877. 
