372 GLOSSARY. 



Longitudinal Running lengthwise. 



Loral plate Plate between eye and mouth of a serpent. 



Lore Space between eye and bill. 



Mailed cheeks Having the suborbital bone extending over the 



cheeks, articulating with the preopercle (cheeks not neces- 

 sarily hard or bony) ; said of some fishes. 

 Mandible Under jaw (or in birds, either jaw.) 

 Maxilla Upper jaw. 

 Maxillaries Outermost or hindmost bones of the upper jaw, in 



fishes. 



Metacarpus The hand proper, exclusive of the fingers. 

 Metatarsus The foot proper. (See Tarsus.) 

 Molars The grinding teeth; posterior teeth in the jaw. 

 Moniliform Necklace-shaped widened at regular intervals. 

 Monogamous Pairing; said of birds. 

 Muciferous Producing or containing mucus. 

 Nape Upper part of neck, next to the occiput. 

 Nasal Pertaining to the nostrils. 

 Neural Pertaining to nerves. 



Nictitating membrane The third or inner eye-lid, of birds, etc. 

 Nuchal Pertaining to the nape or nucha. 

 Obscure Dark, scarcely visible. 

 Obsolete Faintly marked ; little evident. 

 Obtuse Blunt. 



Occipital Pertaining to the occiput. 

 Occipital plates Plates on the head of a serpent, behind the 



vertical plate. 

 Occiput Back of the head. 

 Ocellate With eye -like spots, generally roundish and with a 



lighter border. 

 Ocherous Brownish yellow. 

 Oid (suffix) Like as Percoid, perch-like. 

 Opercle, or operculum Gill cover ; the posterior membrane bone 



of the side of the head, in fishes. 

 Opercular bones Membrane bones of the side of the head, in 



fishes. 

 Opercular flap Prolongation of the upper posterior angle of the 



opercle, in Sun -Fishes, etc. 



Opisthocwlian Concave behind ; said of vertebrae. 

 Orbicular Nearly circular. 



