HULL CALL Hy 



Clasping organ — specialized holdfast structure of certain males used in conula- 



tion. ' 



Coelenteron — internal cavity of a coelenterate, which servos as a diKcstivc 

 tract as well as body cavity. 



Coelom — body cavity. 



Columella — rodhke bone of middle ear of anura formed from hyomandihular 



bone. 



Compound eye — made up of several simple eyes. 



Cotyledon — embryonic leaf, in a seed. 



Ctenoid scales — scales with a comblike or serrate margin. 



Cuticle — an outer layer of the skin. 



Cycloid scales — scales with evenly curved free border. 



Cytoplasm — the living substance of the cell outside of the nucleus and inside 

 the cell membrane. 



Deciduous — falling off at maturity. 



Dentition — number, arrangement, and kind of teeth. 



Diaphragm — (Bot.) a septum or membranous layer. 



Dicotyledon — a plant that bears seeds having two cotyledons. 



Digits — terminal divisions of limb in any vertebrate above fishes. 



Diploblastic — having two distinct germ layers. 



Direct development — no metamorphosis, i.e., the young when hatched closely 

 resemble adult except for size. 



Dorsal — pertaining to the back or top side of (as of a leaf). 



Dorsoventral — pertaining to structures which extend from dorsal to ventral 

 side. 



Ectoderm — the outer embryonic layer in a multicellular animal. 



Ectoparasite — a parasite that lives on the exterior of an organism. 



Elytra — the anterior wings of beetles, hard and caselikc. 



Embryo sac — the megaspore in plants. 



Endoparasite — a parasite which lives within the body of its host. 



Endostyle — ciliated groove whose cells secrete mucus. Foimd in urochordate,s 



and cephalochordates. 

 Epithelium — cellular tissue covering a free surface or lining a tube or cavity. 

 Excretory — pertaining to organs of elimination. 

 Exo-skeleton — an outside skeleton such as the shell of a lobster. 

 Fibrovascular bundles — collections of tubular cells, supported by woody cells, 



which conduct fluids in plants. 

 Filamentous — composed of long, threadlike structures. 

 Flagella — threadlike projections of cells, which are used for locomotion. 

 Flame cell — the terminal cells of l)ranches of excretory system in flatwornis, 



with cavity continuous with lumen of duct, and containing a ciliuni or l)uncli 



of cilia, the motions of which give a flickering appearance similar to that of 



a flame. 

 Foot — thick muscular locomotor organ of molluscs. 

 Furcula — a forked process or structure. 

 Gamete — a mature sex cell. 

 Gametophyte — a stage in the life history of a moss or fern in which sex cells 



are produced. 

 Ganglion — a group of nerve cells situated outside of the brain or spinal .•oluinn. 

 Gastric — pertaining to or in region of stomach. 

 H. w. H. — 9 



