Part 4

— 5. d. Posterior molar of the lower jaw more worn than in 5. b.

— 6. a. Molar teeth of the lower jaw of Mus longipilis.

— 6. b. Molar teeth of the upper jaw.

— 7. a. Skull of Mus nasutus.

— 7. b. Molar teeth of upper jaw.

— 7. c. ditto of lower jaw.

— 8. a. Skull of Mus Galapagoensis.

— 8. b. Molar teeth of upper jaw.

— 8. c. ditto of lower jaw.

XXXIV. Skulls and molar teeth of various species of Rodents, &c.

Fig. 1. a. Skull of Mus longicaudatus—natural size.

— 1. b. Molar teeth of upper jaw of ditto.

— 1. c. ditto of lower jaw.

— 1. d. Ramus of lower jaw—natural size.

— 2. a. Skull of Mus elegans—natural size.

— 2. b. Molar teeth of upper jaw.

— 2. c. ditto of lower jaw.

— 3. a. Skull of Mus bimaculatus—nat. size.

— 3. b. Molar teeth of upper jaw.

— 3. c. ditto of lower jaw.

— 3. d. Ramus of lower jaw—natural size.

— 4. a. Skull of Mus gracilipes.

— 4. b. Molar teeth of upper jaw.

— 4. c. ditto of lower jaw.

— 4. d. View of the under side of the tarsus.

— 5. a. First and second molar teeth of upper jaw of Mus flavescens.

— 5. b. Two posterior molar teeth of the lower jaw of ditto.

— 6. a. Molar teeth of the upper jaw of Mus Magellanicus.