Fig. 1. _a._ Skull of _Desmodus D’Orbignyi_.
— 1. _b._ ditto, viewed from beneath.
— 1. _c._ ditto, side view.
— 1. _d._ Front view of the incisors, and canines of upper jaw
magnified.
— 1. _e._ Side view of do. and the molar teeth.
— 1. _f._ Front view of incisors and canines of lower jaw,
magnified.
— 1. _g._ Side view of ditto, and molar teeth.
— 2. _a._ Skull of _Phyllostoma Grayi_.
— 2. _b._ Side view of ditto.
— 2. _c._ } Front view of incisors of upper and
— 2. _d._ } lower jaws magnified.
— 3. _a._ Skull of _Vespertilio Chiloensis_.
— 3. _b._ Side view of ditto.
— 3. _c._ Front view of upper and lower incisors magnified.
— 4. _a._ Skull of _Lutra Platensis_.
— 4. _b._ Under view of ditto.
— 4. _c._ Side view of fore part of ditto.
— 4. _d._ Upper view of lower jaw of ditto.
— 5. _a._ Skull of _Didelphis elegans_.
— 5. _b._ Under view of ditto.[1]
— 5. _c._ Side view ditto.
— 5. _d._ _Ramus_ of lower jaw, outer side.
— 5. _e._ The same, viewed from above, and magnified.