0RISM0L0GY. 277 
and form an angle like the outer bottom of a boat. 
— Ex. Notonccta glauca. 
2. Convex {Convexa). An elevation the arc of which 
is the segment of a circle.— Ex. Upper Surface of 
the body of most Coleoptera. 
3. Gibbous (Gibba). An elevation the arc of which 
is not the segment of a circle 3 .— Ex. Shoulders of 
the elytra of Prionus coriarius, and of many other 
Coleoptera. 
4. Plane (Pla?ia). Flat. When the disk is not higher 
than the limb, nor the limb than the disk. 
5. Concave (Concava). A depression the arc of which 
is the segment of a circle. 
6. Excavate (Excavata). A depression the arc of 
which is not the segment of a circle. — Ex. Protho- 
rax of Sinodendrum cylindricum. 
hi. SCULPTURE. 
1. Equate b (JEquata). Without larger partial eleva- 
tions or depressions. 
2. Smooth (Lcevis). Without smaller partial elevations 
or depressions. 
3. Levigate (Laevigata). Without any partial eleva- 
tions or depressions. 
This term in Anatomy denotes any unnatural protuberance or 
convexity of the body, as a person hunched, or hump-backed. In 
Astronomy it is used in reference to the enlightened parts of the 
moon, whilst she is moving from the first quarter to the full, and 
from the full to the last quarter ; for all that time the dark part ap- 
pears horned or falcated, and the light one hunched out, convex or 
gibbous. 
\\ e employ the term ccquatus instead otocqualis commonly used 
in this sense, because ccqualis is also applied to magnitude, to which 
we would restrict it. 
