130 DR. J. E. GRAY ON THE SPECIES OF LEMTJROIDS. [April 21, 



In my outline of an attempt at the disposition of Mammalia into 

 tribes and families, in the 'Annals of Philosophy' for 1825 (vol. x. 

 p. 337), I divided the family Lemuridce as mider — 



f Head long, grinders blunt. \. Lemurina: Lemur, i/w. 2. Li- 



chanotina : Indris, Lacip ; Lichanotus, Illiger. 

 ff Head round. 3. Loridina: Loris, Geoff. ; Nycticebus, Geoff. 

 4. Galagonina: OioWcims, Illiger ; GisX&^o, Adanson; Cheiro- 

 galeus, Geoff. 5. Tarsina: Tarsius. 6. Cheiromyina : Cheiro- 

 mys, Cuvier, — 

 considering Galeopithecidce as a separate family, 



M. Isidore Geoflfroy, in the ' Catalogue of the Mammalia in the 

 Paris Museum,' 1851, divides the Lemuroid animals into three fa- 

 milies, viz. Lemuridce, Tarsidce, and Cheiromyidce \ and he divides 

 the Lemuridce into three subfamilies, according to the number of the 

 teeth, thus — 



I. Indrisina. — Grinders g^ ; lower cutting teeth 2 ; in all 30. 

 Genera Indris, Propithecus, and Avahis. 



II. Lemurina. — Grinders g^ ; lower cutting teeth 4 ; in all 36. 

 Tarsus moderate, or of the usual length. Genera Lemur, Hapale- 

 miir, Lepilemur, Cheirogaleus, Perodicticus, Nycticebus, and Loris. 



III. Galagina. — Grinders |^ ; lower cutting teeth 4 ; in all 36. 

 Tarsus elongate. Genera Microcebus and Galago. 



The genus Galeopithecus is not included in the part of the work 

 that has as yet appeared. 



Mr. A. G. Dahlbom, in his ' Studies on the Primates in the Paris 

 and other Museums,' proposes to divide the Lemurine Primates, or 

 Prosimia, into three groups, according to the length and breadth of 

 the feet, as defined by the comparative length of the tarsus and 

 metatarsus, thus — 



I. The Prosimice brachytarsce, with tarsi shorter than the meta- 

 tarsi. Genera Indris, Avahis, and Propithecus. 



II. The Prosimice isotarsce, with the tarsi and metatarsi equal in 

 length. Genera Perodicticus, Nycticebus, Loris, Lemur, Lepilemur, 

 Cheirogaleus. 



III. The Prosimice macrotarsm, with the tarsi much longer than 

 the metatarsus. Genera Galago, Hemigalago, Microcebus, and Tar- 

 sius. 



He regards the Prosimice brachy- and iso-tarsce as forming the 

 tenth family, Lemuridce ; the Prosimice macrotarscB as a distinct or 

 eleventh family ; and forms the genus Daubentonia, Geoffroy (or 

 Cheiromys of Cuvier) , into a twelfth family, which he calls Glirisimice. 



It will be seen by the foregoing observations that M. Isidore 

 Geoffroy divides the group of Lemuroid animals into three families, 

 according to the form and number of the cutting teeth — thus, Le- 

 muridce, Tarsidce, and Cheiromyidce. I think that such a division 

 is both natural and convenient ; and at the same time every one who 

 well examines the osteological characters and the general habit, as 

 well as the external appearance, of the two genera Tarsius and 



