GLOSSARY. 



229 



lachrymal bone in the fleer family; the depression con- 

 taining the crumen gland. 



LAMBDOIDAL 

 SUTURE (Gr. lambda, 

 the letter A, and cidos, 

 form). The suture at 

 the back of the crown 

 of the head connecting 

 the upper part of the 

 occiput with the two 

 parietal bones. See 

 SUTURE and fig. 39. 

 Lambdoidal crest, 

 a bony ridge situated 

 at this suture. 



LAMELLA 

 (Lat.). A thin 

 plate. 



LARYNX (Gr. 

 and Lat.). The 

 voice-box; the 

 upper part of the 

 windpipe, the part 

 in which sounds 

 are produced. 



LIBER (Lat, a 

 book). The third 

 compartment in 

 the complex sto- 

 mach of a rumi- 



upwards from the front of the pelvis; characteristic of 

 the marsupials and monotremes. See figs. 27 and 28. 



MARSUPIALIA (Lat. marsupium, a pouch). An 

 order of mammals in which the females usually have a 

 pouch in front in which they carry about their young for 

 some time after birth. See figs. 27 and 28. 



MAXILLA (I-at). One of the bones forming the 

 side of the upper jaw; the bone in which all the teeth 

 behind the upper canines are set. 



MEDIAN (Lat. meditts, middle). Placed in the 

 middle; running along the middle line. 



MESOZOIC (Gr. mesos, middle, and zoe, life). In 

 geology, same as Secondary. 



METACARPAL (Gr. meta, after, and carpus). Be- 

 longing to the palm of the hand, or the corresponding 

 part in the fore-limb of the lower animals. See fig. 17. 



METATARSAL (Gr. meta, after, and tarsus). Be- 

 longing to the sole of the foot, or the corresponding part 

 in the hind-limb of the lower animals. See fig. 34. 



MILK DENTITION, MILK TEETH. The teeth 

 which first appear, and which are afterwards shed in those 

 animals which have two sets of teeth. 



MIOCENE (Gr. meios, less, and kainos, new). In 

 geology, belonging to the middle division of the Tertiary 

 rocks. See GEOLOGICAL TABLE, vol. i. p. 23. 



MOLAR (Lat. molo, to grind). Sometimes used as 

 a general term for one of the cheek-teeth, but more 



IV. 



Fig. 27. Skeleton of Kangaroo, m.nt. Marsupial bones: II. -V. Digits as 

 numbered. Observe the small second and third digits which in the living 

 animal are united under the same fold of skin as far as the claws. Observe also 

 the strong tail with chevron bones (ck.). 



nant; so called because it contains layers of mucous 

 membrane arranged like the leaves of a book; also called 

 Omasum, Psalterinm, and Manyplies, or (Scotch) Motiy- 

 plics. See fig. 37. 



LIGAMENT (Lat. ligamcnitim, from ligo, to bind). 

 A strong tissue serving to bind one bone to another. 



LUMBAR (Lat. lumbus, the loin). Pertaining to the 

 loin. Lumbar region, the 

 posterior portion of the body 

 between the false ribs and 

 the upper edge of the haunch- 

 bone. 



MAMM^ (Lat). The fe- 

 male breasts. See vol. i. p. 3. 



MANUBRIUM STERNI 

 (Lat, handle of the breast- 

 bone). Same as Prtsternum. 



MANYPLIES = many folds. Same as LIBER. 



MARSUPIAL. Noun, a member of the Marsupialia. 

 Adj. pertaining or belonging to the Marsupialia. Mar- 

 supial bones, two spur-like bones running forwards and 



Fig. 28. Lower Jaw of Wombat, 

 showing the inflexion behind, char- 

 acteristic of the Marsupials. 



Fig. 29. Last Lower Tooth (Molar) of 

 Indian Elephant. 



Fig. 30. Last Lower Tooth 

 (Molar) of African Elephant. 



specifically applied to those cheek-teeth which appear 

 only in the permanent dentition. See figs. 6, 29, and 30. 



MOLLUSK (Lat. mottuscus, soft). A member of the 

 Mollusca, the group of soft-bodied animals to which the 

 snails, mussels, sea-slugs, &c. belong. 



MONOPHYODONT (Gr. monos, alone, phyS, to be- 

 come, and odoiis, odontos, a tooth). Furnished with only 

 one set of teeth in the course of life, like most of the 

 Edentata. Distinguished from Diphyodont. 



MONOTREMATA (Gr. monos, single, and trenia, an 

 aperture). The name of an order of mammals in which 

 there is only one opening to the exterior for the chamber 

 which receives the terminations of the intestinal canal, 

 and the ducts of the urinary and generative organs. 



MONOTREME. A member of the Monotremata. 



NARES (Lat). The nostrils. Posterior nares, the 

 passages leading from the nostrils to the back of the 

 mouth. 



NASAL (Lat nasus, the nose). Belonging to the 

 nose; specifically, applied to the bones inclosing the 

 nostrils and situated immediately in front of the frontals. 

 See figs. 31, 33, and 39. 



NICTITATING MEMBRANE (Lat. nicto, to wink). 

 A membrane placed within the eyelids, and capable of 

 being rapidly passed over the front of the eye to remove 

 foreign matters; also called the third eyelid. It is present 

 in reptiles and birds, and in the monotremes among 

 mammals. 



