THE FISHES OF NEW JERSEY. 445 



Jugular. Relating to the lower throat. Usually with reference to ventral 

 fins inserted in advance of the pectorals. 



Keeled. Furnished with a ridge along the median line. 



Lacustrine. Living in lakes. 



Lamellce. Plate-like processes. 



Larva. An immature form' which must undergo change of appearance before 

 becoming adult. 



Lateral line. A series of muciferous tubes along each side of the body form- 

 ing a raised line. 



Lateral processes. Parapophyses. 



Lunate. Form of new moon or crescent-shaped. Usually with reference to 

 a broad and shallow-forked caudal lobe. 



Mandible. Lower jaw. 

 Maxilla. Upper jaw. 



Maxillaries. Outermost or hindermost bones of upper jaw. 

 Maxillary. Upper jaw. 

 Mesethmoid. Ethmoid. 

 Meso pterygoid. A suspensorium bone. 

 Metapterygoid. A suspensorium bone. 

 Milt. Testes. 



Molars. Grinding teeth, usually posterior in the jaws. 

 Muciferous. Producing or containing mucous. 

 Myocomma. A muscular band. 



Myodome. Cavity under the brain-cavity for the reception of the rectus 

 muscles of the eye. 



Nape. Neck above, next to the occiput. 



Nares. Nostrils. 



Nasal plate. Plate in which nostrils are inserted. 



Neural arch. Opening through base of neural spine for passage of spinal 



cord. 

 Neural canal. Neural arches as a whole. 

 Neural processes. A plate rising on each side of the centrum of a vertebra 



which unites to form a spine. 

 Neural spine. Uppermost spine of a vertebra. 

 Nictitating membrane. Third or inner eyelid, as in sharks, etc. 

 Notocord. A cellular cord, preceding the vertebral column, in the embryo. 



Occipital. Relating to the occiput. 



Occipital condyle. Portion of the occipital bone modified to articulate with 



the atlas. 

 Occiput. Back of head above. 



Ocellate. Eye-like, usually roundish with a lighter or darker border. 

 Oid. Like, as a suffix, such as Percoid, or perch-like, etc. 



Opercle. Back membrane-bone on side of head covering branchial cavity. 

 Operculum. Opercle. 



