65 Dor 



Divaricate. — Used of two parts tliat are contiguous 

 at the base and very strongly dihescent ; 

 forked, or parted into two branches. (L. dis, 

 and varico, to straddle.) 



Divaricate.- — Standing out very wide. Forked or 

 divided into two branches. Branching off so 

 as to form an obtuse angle above and an acute 

 angle below. (L. dis, and varico.) 



Diverticula. — A hollow appendage branching from 

 the intestinal canal, and terminating in a cul 

 de sac. (L. diverticulum, a by-road, or digression.) 



Dolabriform. — Hatchet-shaped. — Flat, with a 

 prominent keel and cylindrical base. (L. 

 dolabra, an axe, and forma, shape.) 



Dorsal. — Pertaining to the back, or upper surface. 

 (From L. dorsum, the back.) 



Dorsal segments. — Transverse segments of the back, 

 the si('es of which often lap over and cover 

 those of the ventral segments. (L. dorsum, and 

 seco, to cut.) 



Dorsal spiracles. — Lateral breathing pores seen in 

 the dorsal segments, and which are often covered 

 by the preceding segment. (L. dorsum, Q.n A 

 s]}iritus, breath, from sfiro, to breathe.) 



Dorsal vessel. — A slender tube opening from the 

 hindermost chamber of the heart, and running 

 the length of the abdomen on the median line, 

 being attached to the dorsal wall of the segments 

 by several triangular muscles. (L. dorsum, and 

 M.E. vessel.) 



