594. GLOSSARY. 
Nodose, having knobs or swellings. 
Nodule, a little knot-like eminence. 
Oblique, running sideways. 
Obsolete, partially indistinct, not well defined. 
(Esophagus, the gullet. 
Opake, not transparent. 
Operculwm, a lid or cover. 
Ordinate, when spots, etc., are placed in rows. 
Orifice, an opening ; the mouth. 
Oval, having the longitudinal twice the length of the transverse 
diameter. 
Ovary, the part in which ova or eggs are formed. 
Ovate, shaped like the longitudinal section of an egg. 
Oviparous, produced by eggs hatched after exclusion from the | 
body. 
Ovoviviparous, when the eggs are hatched in the body of the ani- 
mal and excluded alive. 
Ovisac, egg-bag. 
Ovoid, approaching to the shape of an egg. 
Palmated, shaped like the hand with the fingers extended. 
Panicled, in a loose spike. 
Parasitic, existing on some other body. 
Parenchyma, spongy matter; the pith. 
Parietes, walls. 
Pectinated, reserabling the teeth of a comb. 
