Hinckley.] 
314 
[January 4, 
and horny fringe or teeth at the edge of the upper lip), Bufo americanus, 
B. fowleri, Hyla versicolor and Hylodes pickeringii have a fringed upper 
lip. 
Palatines. — “On en compte trois chez les Hylidae (Hyla arborea).” 
We count but one, separated by a gap above the upper jaw (Hyla versicolor 
and Hylodes pickeringii). “ Chez les Ranidae, le nombre des palatines 
varie de 2 a 6. Toutes sont franchement laterales et tres distantes de la 
ligne mediane.” We count from 0 to 3 with the Ranidae. All are separated 
by a wide gap. “ Enfin la presence de 2 palatines laterales seulement con- 
stitue un caractere distinctif de la famille des Bufonidae.” We count in B. 
americanus and B. fowleri but one, separated by a gap above the upper 
jaw. 
Linguales. — “ Jamais unelinguale mediane n’est situee entre les linguales 
laterales et la mandibule inferieure.” Here one sometimes finds an excep- 
tion to this rule in the tadpoles of Hyla versicolor. In the other species it 
holds true. “Les Hylidae ont 4 linguales, dont 2 medianes et 2 laterales.” 
Here, H. versicolor has 3 linguals ; Hylodes pickeringii 2, with the edge of 
the lip usually partly fringed. “ Chez les Ranidae, le nombre des linguales 
varie de4 a 5. Chez toutes on compte 2 linguales laterales.” Here, the 
number varies from 3 to 4 linguals. Only that next the lower mandible is 
separated, excepting occasionally in R. silvatica a partial division of the 
second fold occurs. “ Pour le nombre et la disposition, les linguales des Bu- 
fonidae rapellent celle des Discoglosses; on en compte aussi de 3 a 4.” Bufo 
americanus and B. fowleri have each 2 with a broad space of fringe of horny 
teeth at the edge of the border of the under lip. 
EXPLANATION OF PLATE 5. 
Fig. 1. Head of Rana catesbeiana in profile (2 diameters). 
Fig. 2. Same enlarged 9 diameters; a. the upper lip; b. lower lip 
c. upper jaw ; d. lower jaw ; e. fringed fold; f. border of lip. 
Fig. 3. Mouth of tadpole of Bufo americanus (10 diameters). 
Fig. 4. Mouth of tadpole of Hyla versicolor (10 diameters). 
Fig. 5. Mouth of tadpole of Hylodes pickeringii (10 diameters). 
Fig. 6. Mouth of tadpole of Rana silvatica (10 diameters). 
Fig. 7. Mouth of tadpole of R. catesbeiana (5 diameters). 
Fig. 8. Mouth of tadpole of R. fontinalis (7 diameters). 
Fig. 9. Mouth of tadpole of R. palustris (8 diameters). 
Dr. M. E. Wadsworth said he desired to announce to the Soci- 
ety the discovery of picotite (chrome spinel) in the feldspar, 
augite, and groundmass of a basalt from Mt. Shasta, California. 
