FISH OF ONTARIO. 113 



J. 



Jugular. Pertaining to the lower throat ; said of the ventral fins when 



placed in advance of the attachment of the pectorals. 

 Jugulum. The lower throat. 



K. 



Keeled. Having a ridge along the middle line. 



L. 



Labials. Plates forming the lip of a serpent. 



Lacustrine. Living in lakes. 



Lamellae. Plate-like processes, such as are seen inside a duck's bill. 



Lamellate. Said of a bill provided with lamellae, as in a duck. 



Lanceolate. Shaped like the head of a lance. 



Larva. An immature form, which must undergo change of appearance 



before becoming adult. 

 Larynx. A hollow cartilaginous organ ; a modification of the windpipe. 

 Lateral. To or towards the side. 

 Lateral line. A series of muciferous tubes forming a raised line along the 



sides of a fish. 

 Lateral processes. Synonym of parapophyses. 

 Laterally. Sidewise. 



Lobate. Furnished with membranous flaps ; said of the toes of birds. 

 Lobe. Membranous flap. 

 Longitudinal. Running lengthwise. 

 Loral plate. Plate between eye and nostril of a serpent, before and below 



preocular when this is present ; its longest diameter horizontal. 

 Lores. Space between eye and bill. 

 Lunate. Form of the new moon; having a broad and rather shallow fork. 



M. 



Mammary Glands. Glands secreting milk. 



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



Maxilla or maxillary. Upper jaw. 



Maxillaries. Outermost or hindmost bones of the upper jaw in fishes ; 



they are joined to the premaxiliaries in front and usually extend 



further back than the latter. 

 Melanism. State of colouration arising from excess of dark pigment ; a 



frequent condition of hawks. 

 Membrane. Soft skinny covering of the bill of some birds. 



12 F. 



