30 NOMF.XC'LATUllE. 



Concave (coiicaxyus), when one surface of tlie body is de- 

 pressed. A higher degree of this depression is denominated 

 hooded {cuculatus). 



When the hollowing is performed in a straight line, and a 

 section of it is hemispherical, it is said to be channelled (cana- 

 ricidatufi). 



AVhen the hollowing is continued throughout a considerable 

 length, and it shews an angular section, it is called boat* 

 shaped or Iccel-fihapcd {navicidatus^ and carinatus). 



AVhen a body is hollow throughout its whole length, it is 

 called tuhc-sliapcd (tubidosi/.s, fistuloms). When the lower 

 and narrow part of the tube is gradually stretched into a very 

 wide circumference, the funnel-shape is produced {iJifundibu- 

 li/brmh). 



Bell-shaped {campanidatus, campanifrn'mis), when the in- 

 terior hollow channel is closed at one end, and is somewhat 

 narrower in that part than at the other, where it is open and 

 expanded. 



When a narrow tube passes suddenly into a somewhat de- 

 pressed margin, but raised in the middle, it is said to be sal- 

 ver-shaped. 



If the tube is so short, that it is scarcely attended to, but 

 the rim is very flat and expanded, the body is said to be 

 wheel-shaped. 



If the tube is bent, pointed at one end, and expanded at 

 the otlier, it is said to be pnjboscis-shaped {prohosddeus). To 

 this belongs the shut and self opening cavity of some or- 

 gans {pars clausa et dcMscens). If the opening is very small 

 and round, it is said to be periusus^ as the fruit of Endocar- 

 pon tephroides. A small hollowing in the base is said also to 

 Ix* iwcidptus^ as in the seeds of the Anchusa. 



V. Insertion, or Relative Position. 



33. 



The position of organs, or of their parts, is a vei'y variable 

 expression, which may be referred to several kinds of charac- 



