The Ohio ^JSCaturalist, 



PUBLISHED BY 



The Biological Club of the Ohio State Uni'versity, 

 Volume VIII. JUNE, 1908. No. 8. 



TABLE OF CONTENTS. 



Branson— Notes on Diuiehthys terrelli Newberry, with a Restoration 363 



De LA. Torre Bueno— On tlie Aquatic and Semi-Aquatic Hemiptera Collected by 



Prof. James S. Hine in Guatemala. (First Paper.) 370 



NOTES ON DINICHTHYS TERRELLI NEWBERRY, WITH A 



RESTORATION. 



Contribution from the Geological Laboratory of Oberlin College. 



E. B. Branson. 



In volume seven of the Ohio Geological Survey, page 626, 

 Professor A. A. Wright gives measurements of the bones of an 

 almost complete specimen of Dinichthys terrelli Newberry. 

 This is probably the most complete specimen of Dinichthys ever 

 collected. The only bones missing are right mandible, right antero- 

 supero-gnathal, left postero-supero-gnathal, left postero-dorso- 

 lateral, and the median ventrals. The skull is crushed in such 

 a way that the right suborbital lies at the right in the same 

 plane as the roof of the skull. The left sub-orbital and left 

 margin of the skull lie against the bottom of the roof. The dorso- 

 median is broken and the shaft turned to the left. 



Manv of the bones are not perfectly preserved. The lower 

 part of the right clavicular is missing, neither antero-dorso- 

 lateral is perfect, the left clavicular has several parts broken 

 away, the left suborbital is imperfect posteriorly and the right 

 suborbital is imperfect anteriorly, and other bones have small 

 portions missing. 



The accompanying restoration is made from this specimen 

 and the excellence of the specimen leaves few points in doubt. 

 Nearly all of the points were checked up with other specimens. 



The ventrals are those figured by Professor A. A. Wright in 

 volume seven of the Ohio Geological Survey.* The specimen 

 furnishes no positive indication of the relation of the ventrals 

 to the other bones, but the left antero-ventral is crushed against 

 the right antero-dorso-lateral. The position of the ventrals 

 shown in figure 1 represents nothing more than the writer's opin- 

 ion of their proper location. 



* Ohio Geological Survey, Vol. VII, Plate XLIV, figs. 1, 2, 3, 4, and 9. 



