96 



exceptions, and the nucleus becomes globular or nearly so when in 

 contact with water. In the blood-corpuscle of mammals the centrai 

 spot, so often mistaken for a nucleus, is not visible in the best focus 

 and light ; then if the object-glass be so slightly removed from the 

 corpuscles as not to destroy their clear contour, a dark spot appears 

 in their centre ; if the glass be next so far moved towards the cor- 

 puscles as to place them slightly within the focus, the dark spot will 

 become bright ; and -vvhen altogether invisible in a bright light, the 

 spot may be ingtantly brought into view simply by diminishing the 

 light. 



Note. — The follo\ving measurements are all in vulgar fractions of 

 an English inch ; but for the sake of convenience, the numerator is 

 omitted throughout, as it is invariably 1, and the denominators only 

 are printed. The measurements of the blood-discs are given as they 

 lie flat, unless vvhen a T indicates a measurement of their thickness. 

 By L.D. the long diameter and by S. D. the short diameter is de- 

 noted. The measurements refer exclusively to average sizes. The 

 nuclei ■vvere measured after exposing them by the action of dilute 

 acetic acid on the enveloj^es. 



MAMMALIA. 



Horao I 3200 



T... 12400 



SiMi^ Catarrhini. 



Simia Troglodytes 



Pithecus SatjTus 



Hylobates Hoolock 



— leucogenys 



— Rafflesii 



Semnopithecus Maurus 

 Cercopithecus Mona .. 



— sabseus 



— fuliginosus 



— ruber 



— pileatus 



— pygerythrus 



— Petaurista 



griseo-viridis 



jEthiops 



Macacus radiatns 



Rhesus 



niger 



cjTiomolgus 



Šilėnus 



nemestrinus 



sylvanus 



melanotus 



Cynocephalus Anubis . . 

 leucopbaBus 



3412 

 3383 

 3368 

 3425 

 3539 

 3515 

 3468 

 3342 

 3530 

 3395 

 3578 

 3401 

 3478 

 3429 

 3454 

 3563 

 3429 

 3583 

 3429 

 3430 

 3493 

 3338 

 3389 

 3461 

 3555 



SiMiiE Platyrrhini. 

 Ateles subpentadactylus 3620 



Ateles ater 



Belzebuth .. 



Cebus Apella 



capucinus .. 



Callithrix sciiireus 

 Jacchus vulgaris .. 

 Midas Rosalia 



Lemurid^. 



Lemur albifrous . 



Catta 



Anjuanensis 



nigrifrons 



Loris tardigradus . 

 gracilis .... 



Cheiroptera. 



Vespertilio murinus . 



noctula 



Pipistrellus .... 



Plecotus auritus .... 



Insecth^ora. 



Talpa Europaea 



Erinaceus Europaeiis 

 Sores tetragonurus ., 



Plantigrada. 



Meles ^^llgaris ... 

 Arctonyx collaris , 



3602 

 3589 

 3467 

 3454 

 3713 

 3624 

 3510 



3976 

 3892 

 4003 

 4440 

 3691 

 3461 



4175 

 4404 

 4324 

 4465 



4747 



4085 

 4571 



3940 

 3609 



