Biometrika, Vol. XIII, Part IV 
Pearson & Davin, Saa/iioUfs 
To face i>. 39i 
THE EVOLUTION OF THE ORTHOSESAMOIDS OF THE KNEE-JOINT (INCLUDING THE PATELLA). 
No Sesamoids 
(Most Amphibia) 
No Sesamoids 
(Some Eeptilia) 
No Sesamoids 
Tibial Crest 
Tibial Crest 
.■ij>cs, e.g. 
Fibular Crest 
(Some Beptilia ??) 
Parafibiila and Lunulae 
{Some Re2)tilia, e.g. Varanus) 
Paratibula 
Single Lunula 
(Some Amphibia e.g. Leptodaciylns pentadactijlm) 
Lunulae Tibial Crest 
(Some Iteptilia, e.g. Amphibolimis barbata) (Some lieplilia ?) 
Tibial Crest and Lunulae Tibial Crest and Lunulae 
(Some Avcn) (Some Eeptilia ?) 
Tibial Crest, Flake Patella and Lunulae Patella, Parafibula aud Lunulae 
(Some Aves, e.g. Albatross) (Some Aves, e.g. Coli/iubiin) (Some Jlcptilia? e.g. Corttcia zebrata) '.' 
Patella and Lunulae Patella, Paratibula and Lunulae 
(Some Aves) ? 
Patella Patella and Lunulae Patella, Parafibula and Lunulae 
(Some Edentates, Dasypm, Chlamydophoriis) ? (Some Edentates, Megatherium, Bradi/podidae, Maiiidac) 
Patella Patella and Lunulae Patella, Lunulae, L. Fabella 
(Some Insectivores??) (Some Insectivores, Myogale, perhaps) (Some lusectivores, e.g. Talpa, Fotamotjale) 
Patella Patella and L. Fabella Patella, Lunulae, L. and M. Fabella 
(Unciulata, Pinitipcdia) {Uyracoidca. ? Some Cervidae) (Some Insectivores, e.g. Erinaceus, Tupaia, Jlylomys] 
Patella and Lunulae Patella, Lunulae, L. and M. Fabellae 
(Some Rodents, e.g. Castor fiber) (Some Bodents, e.g. Mas musculus, Fiber zibethiciis, Dasyprocta) 
Patella, L. and M. Fabellae, Cyamella 
(Some Lemuroids, e.g. Chiromyt 
Patella and Cyamella 
(Some Aiithropoidea, Oraug, Gorilla) 
Patella 
(Some Antluojioidea, Chimpanzee, and Huininidac, Man) 
(Some Caraivores, e.g. Fetis domestica) 
Patella, L. and M. Fabellae 
(Some Carnivores, e.g. FcUs itcbulosa) 
Patella and L. Fabella 
(Some Carnivores, e.g. Lutra, Gula vittattis) 
Patella 
(Some Carnivores, e.g. Urstis) 
Patella and Fibular Crest 
(Monotremes) i 
Fibular Crest 
(Some Marsupials, e.g. occasionally Wombat) 
Parafibula 
(Some Marsupials; usually Wombat) 
L. Fabella and Cyamella 
(Some Marsupials, e.g. Macropus) 
Patella, and L. Fabella Patella and Cyamella 
(Some Edentates? Oryctcropiis) (Some Edentates, e.g. Myrmccophaga) 
Patella, Cyamella, Lunulae 
(Some Insectivores, e.g. Ericuliis 
Patella, Lunulae, Cyamella, L. and M. Fabellae 
(Some Lemuroids, e.g. Loris and Potto) 
Patella, Cyamella, L. aud M, Fabellae 
Cebidae, and Simiudac) 
Patella, L. and M. Fabellae 
(Certain Hylobatinae) 
Patella and L. Fabellae 
(Certain Hylobatinae 
Patella, Cyamella and (or fused with) L. Fabella 
(Some Marsupials, e.g. Pe ram el a, bony kernel to patella in others) 
Cyamella and (or fused with) L. Fabella, M. Fabella 
(asserted of flalmatarun) 
Patellae, Lunulae, Cyamella, L. and M. Fabellae Patella, Cyamella, L, aud M. Fabellae 
(Some Rodents, e.g. Rabbit, Squirrel) (Probable ancestor of Chiroptera) 
Patella, L. aud M. Fabellae 
(Some Chiroptera, e.g. Cynopterns marginatiui) 
Cyamella, L. and M. Fabellae 
(Some Chiroptera, e.g. certain species Vespertilio) 
h. and M. Fabellae 
(Some Chiroptera, e.g. Vespertilio murinus) 
L. Fabella 
(Some Chiroptera, e.g. Phyllostoma) 
No Sesamoids 
Some Chiroptera, e.g. certain species Pteropus) 
