881 



MONITORID^E. 



MONOTREMES. 



4. Scales over the orbit small, with a central longitudinal series 

 of larger plates. 



V. nebtdosua (Monitor nebulosus, Gray ; M. nebidatus, Schlegel 

 the Coloured Uaran. Nostrils large, rather nearer the orbit that 

 the end of the muzzle ; orbital shield with a larger series ; back o 

 neck with converging dark streaks. It is a native of India. 



C. Tail triangular, compressed, and with a doubly-toothed 



crest above. Nostrils small, round. Aquatic. 

 Monitor, Gray (Polydatdalui, Wagler; Uaranus, Fitz.). Nostril 

 small, round, in the middle, between the apex of the muzzle and th 

 front angle of the eye. Tail elongate, compressed, with a double 

 edged keel above. Toes elongate, unequal, strong. Teeth rounded. 



a. Scales over the eyea equal. Nape with lunate bands. African. 



M. Niloticu* (Lacerta Nilotica, Hasselq. ; L. Capensis, Sparm. 

 Tupinambit orneUtu, Daud. ; Stellio Saurus, Laur. ; T. dcgans, Daud. 

 T. ttellatui, Daud. ; M. pulcher, Leach), the Nilotic Monitor 

 Head gray, when young with concentric rows of white spots. Back o 

 neck with lunate cross bands. Under side of body and head grayish 

 white-spotted when young, black cross banded. The shield over thi 

 yes flat, sub-equal, many-sided. 



Nilotic Monitor (Monitor JTiloticus). 



It is found in Egypt, where the modern Egyptians have a fablo that 

 the animal is a young crocodile which has been hatched on dry land 

 its indeed all young crocodiles are but they mean, we suppose, to 

 convey the idea that it is a dwindled and neglected offspring. The 

 species is to be found on the monuments of the ancient Egyptians, 

 probably on account of its devouring the eggs of the crocodile. 



*, akull of Monitor 



, seen from above ; ft, undcr-jaw of same. 



ft. Scales over the eyes equal. Nape coloured like the back. 



M. Dracama, Gray (Lacerta, Dracana, Linn. ; Stellio Salveguardia, 

 Laur. ; Tupinambis Bengalemig, Daud. ; T. Indicia, Daud. ; T. Cepe- 

 diantu, Daud. ; Uaranus guttatut, U. punctalut, and V. A rgu, 

 Merrem ; M. gemmatiw, Gudrin), the Indian Monitor. Brown; black- 

 spotted or yellow-eyed when young. Nostrils central ; scales over the 

 eyes flat, small, sub-equal ; of the head rather larger. It is a native 

 <>f India. 



M. (r'ouldi, Schlegel (Hydrotaurns Gouldii, Gray), Gould's Monitor. 

 Neck with two yellow streaks on the side ; scales over the eyes small, 

 granular; of forehead larger. Ventral shields small, longer than 

 broad. It is found in north-western Australia. 



c. Scales over the eyes with a larger central series. 



M. Morottigma, Cuv., the Dotted Monitor. Olive, -with greenish 

 dots. Nostrils rather nearer the muzzle than the eyes; head-scales 

 flat ; scales over the orbit unequal, the central series very large. 



Jli/ilmaurui, Wagler (Titpinambw, Fitz.). Nostrils obloug, longi- 

 tudinal, near the apex of the muzzle. Tail elongated, with a double- 

 edged keel above. Toes unequal, elongate. Teeth compressed, 

 harp-edged, denticulated. Scales small. 



HAT. BIST. DJV. VOL. III. 



* Scales over the orbit equal. Neck with lunate bands. 



H. varius, Gray, (Lacerta varia, Shaw; Tupinambis varicgatus) 

 Daud. ; Hydrmaurus, var. Wagler), the Lace-Lizard. Scales over the 

 orbit very email, equal. It is a native of Australia. 



H. Bcttii (Uaranus Bellii, Dum. et. Bib.), Bell's Lace-Lizard. Pale, 

 body and tail with broad black cross bands ; scales of the orbit dilated, 

 equal. 



** Scales on the orbit equal, small. Neck spotted like the back. 



H, gigantens, Gray, the Gigantic Lace-Lizard. Brown, back and 

 tail with cross bands of large black-edged white spots ; neck and under 

 side of body pale, with large black round reticulations ; legs white- 

 spotted ; toes rather short, strong ; shields of the head sub-equal, 

 convex, over the orbits very small, granular. Found on the coast of 

 Australia. 



** Scales over the orbits with a larger central longitudinal series. 



H. Salvaior (H. bivittatus, Wagler, Stellio Salvalor, Laur. ; Tupi- 

 nambis bimttatus, Kuhl ; Uaranus mttatus, Lesson ; Monitor elcgaitx, 

 Gray; Lacerta Monitor (?) Herm. ; M. marmoratus, Weigmann; U. 

 Ciimingii, Martin; Tupinambis exilis, Reiuw.), the Two-Streaked 

 Lace-Lizard. 



H. praiinta (Monitor prasinus, Miiller), the Green Lace-Lizard. 

 Green, with narrow dark cross bands, generally placed in pairs, those 

 of the neck lunate, the rest transverse, with a brown streak on the 

 cheek behind the nostril ; head-shields flat, rather large, those over 

 the orbits larger in a series. It inhabits the west coast of New 

 Guinea. 



The Great Fossil Lizard [MEGALOSAHRDS] appears to have partaken 

 of the structure of the Monitors and the Crocodiles. The Mosasaurua 

 was also very nearly allied to the Monitory Lizards. [MosASAUBUS.J 

 An account of the dissection, by Mr. Martin, of a Monitor that died 

 at the Gardens of the Zoological Society in the Regent's Park, in 1831, 

 will be found in the ' Proceedings of the Society ' for that year. 



MONK, a kind of Seal. [PnociD.E.1 



MONK-FISH. [SQUALIDJE.] 



MONK'S-HOOD. [ACONITOM.] 



MONK'S-RHUBARB. [RuMEX.] 



MONKEY, the name usually applied to those forms among the 

 Simiada which posses a tail. [QUADBUMANA.] 



MONO. [ATELES.] 



MONOCEROS. [EOTOMOSTOMATA.] 



MONOCHIROS. [PLEURONECTIM:.] 



MONOCHLAMYDE^E, a subdivision of the class of Exogenous 

 Plants. The group is characterised by possessing a single perianth, that 

 is, the calyx and corolla not distinguishable or wanting. [ExooENS.] 



MONOCHROITE. [CHROMIUM.] 



MONOCONDYL^EA", M. D'Orbigny's name for a sub-genus of 

 Unionidte, which he describes as equivalve, inequilateral, sub-rotund 

 or angulated with a hinge formed of a large, obtuse, round, cardinal 

 tooth in each valve, but without lateral teeth. M. Paraguayans, 

 D'Orbigny, is an example. 



MONOCOTYLE'DONS are those plants which are now more com- 

 monly called Endogens. [ENDOGENS.] They derive their name from 

 their seed having generally only one cotyledon ; but there are excep- 

 tions to this, as in wheat, which possesses a second cotyledon in a 

 rudimentary state. Usually the single cotyledon of these plants roll* 

 up, inclosing the radicle and plumula, so that the embryo appears fo 

 be a cylinder with no interruption to the continuity of its surface ; 

 but there are many deviations from this, the most striking of vvhioh 

 are those of Grasses and Aquatic Monocotyledons. 



MONOCULUS. [DAPHNIA.] 



MO'NODON, the Liunasan name for the Narwhal. [CETAOEA.] 



MONODONTA, Lamarck's name for a genus of Trochidic, the 

 columella of which terminates abruptly in a tooth or notch. It is the 

 Odontis of Sowerby. [TROCHID*.] 



MONOI'CA, M. De Blainville's name for his second sub-class of the 

 class Paracephalophora. [MALACOLOGY.] 



MONO'LEPIS, a genus of Macrurous Crustacea intermediate 

 between Porcellana and Megalopa, established by M. Say. 



MONOMYA'RIA, Lamarck's name for his second order of Conchi- 

 fera, consisting of those Conchifers which have but one principal 

 muscular impression in each valve of the shell. [CoNcmFERA ; 

 MALACOLOGY.] 



MONOPHYLLUS. [CHEIROPTERA.] 



MONOPLEUROBRANCHIA'TA, M. De Blaiuville's name for his 

 ;hird order of Paracephalophora Monoica. [MALACOLOGY.] 

 MONOSTEGA. [FORAMINIFEHA.] 



MONOTHALA'MIA, Lamarck's name for his second division of 

 Cephalopoda, including one genus only, namely, Argonauta. [CEPHA- 

 OPODA; MALACOLOGY.] 



MONOTIGMA, Dr. J. E. Gray's name for a genus of turbinated 

 hells allied to Turritelta. 



MONOTREMES, M. Geoffrey's name for certain Edentate Mam- 

 malia which have but one external aperture for the passage of the 

 emen, the urine, and the other excrements. 



The organs of generation of these extraordinary animals present, as 

 might be anticipated, singular anomalies. The different canals termi- 



3 L 



