LXVII.—On some reptilian lower jaws

Some Geometric Lower Bounds

Dobkin and Lipton introduced the connected components argument to prove lower bounds in the linear decision tree model for membership problems, for example the element uniqueness problem. In this paper we apply the same idea to obtain lower bound statements for a variety of problems, each having the avor of element uniqueness. In fact one of these problems is a parametric version of element uni...

Some Lower Bounds for Estrada Index

The reptilian brain

Figure 1. Vertebrate phylogeny, gross brain morphology, and homologous regions in the forebrain. (A) Phylogenetic tree of vertebrates and timeline of major events in amniote evolution. Shaded area in the phylogenetic tree indicates ‘reptiles’ as defi ned in the text. Red lines (lower panel) indicate the origin of amniotes (320 million years ago), the origin of dinosaurs (230 million years ago) ...

Ultrastructure of Reptilian Myoneural Junction

The description of motor end-plates by Doy~re (15) in 1840 initiated a series of light microscope investigations leading to the cytological concepts of the structure of the motor end-plate described in the papers of Ktihne (26), Tiegs (44), Couteaux (6-10), and Gutman and Young (22). The hundredfold or more higher resolution of the electron microscope (EM) clearly offers promise of distinct adv...

Vascularity in the reptilian spectacle

sensitivity curve for 1° 200 ms. flashes on a white background may be a rather precise indicator of the functioning of the opponent-color system. Thus, although J. T. believed that his right eye was normal, the corresponding spectral sensitivity curve (continuous curve, Fig. 3) lies near the limit of the normal range, indicating that his right eye may have been partially affected by a similar d...