372 APPENDIX III 



JUGULAR (L. jugulum, the collar bone), the major vein of the neck, 

 draining the head region, and homologous with the anterior cardinal. 



Jurassic (from Jura Mts. between France and Switzerland), the middle 

 period of the Mesozoic Era, between the Triassic and Cretaceous. 



LABIA (L. labium, a hp), a Hp or lip-hke structure; the labia of the 

 cerebral hemispheres, over the corpus callosum; the structures sur- 

 rounding the mammalian female genitalia — the labia majora and 

 minora, homologous with the scrotum and erectile bodies of the male. 



Lacertilia (L. lacerta, Hzard), an order (or sub-order in some classifica- 

 tions) of reptiles including lizards. 



LACRiMA (L. a tear), a combining form, denoting tears or structures as- 

 sociated with them; lacrimal glands, lacrimal bone, lacrimal duct. 



LACUNA (L. lacus, a basin or lake) ; specifically, the spaces in cartilage or 

 bone containing the individual cells. 



LAMPREY (L. lambo, lick, plus petra, rock), See Petromyzontia. 



LARYNGE.AL (L. larynx, a gullet), adjectival form of larynx; laryngeal 

 cartilages. 



L.ARYNX (L. gullet), the cartilaginous and bony structures surrounding 

 the glottis, containing the vocal cords. 



LATissiMUS (L. broadest), as latissimus dorsi, a muscle of the back. 



LATUS (L. side or broad), a stem and combining form; lateral, lateralis, 

 along the side. 



LEPis (G. a scale), combining form; Cheirolepis, Lepidosteus. 



Lepidosiren (G. lepis, plus siren, a mermaid), a South American genus of 

 dipnoan fish, the most modified of the lung fishes. 



Lepidosteus (G. lepis, plus osteon, bone), a genus of Holostean fish with 

 bony plates arranged in a tile-like manner; the gar-pike and its 

 relatives. 



levator (L. levo, to raise), a muscle which raises a structure; the Levator 

 scapuli; the levators of the jaw; or costal levators. 



LiNEA (L. a line) ; in anatomy, usually a connective tissue line separating 

 two muscle groups; linea alba. 



lingual (L. lingua, tongue), pertaining to the tongue; lingual muscles; 

 lingual glands. 



LiTHOS (G. stone), a combining form; otohth; lithographic limestone. 



lumbar (L. lumbus, loin), the body region between the thoracic and 

 sacral regions. 



LUNA (L. moon), a combining form; lunatum; semilunar valves. 



LUTEA (L. claj'-yellow), a descriptive word; macula luteum; corpora 

 lutea. 



LYMPH (L. lympha, clear water), blood fluids which have passed through 

 the capillary walls and into the lymphatic vessels; it lacks the 

 erythrocytes, and clots more slowly than blood. 



LYMPHOCYTE (L. lympha), leucocytes which develop in the lymph nodes, 

 the smallest of the white cells. 



MACRO (G. makros, long, large), a prefix, opposed to micro; as, macro- 

 scopic anatomy. 



MALLEUS (L. a hammer), descriptive of the shape in the mammalian ear 

 ossicle; develops from the posterior end of Meckel's cartilage; homolo- 

 gous with the articular bone. 



