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 lamellEe, 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. 



r 



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 premaxillaries 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. 



