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Show 400 MR. O. THOMAS ON MAMMALS FROM ECUADOR. [May 4, Measurements in inches and tenths : - in. Length, head and body 16*0 Length of tail 19*0 Tip of nose to eye 1'4 „ ear 26 Length of skull, from occiput to end of praa-maxilloa 3*17 Greatest breadth 2*0 Distance between orbits *65 Width at orbital processes 1*10 Front of praemaxillae to tip of orbital processes 1 *64 Length of upper molar series *90 Length of lower jaw 2*10 Size of upper molars :- Length. Breadth. First 0*17 019 Second 0*21 0*20 Third 0*12 0*18 22. CERCOLEPTES CAUDIVOLVULUS, Pall. One specimen from Sarayacu of the ordinary character, and two from Balzar with remarkably short tails, the tails being about 11 inches long only, while the head and body in both measure about 16 inches. The skulls of these specimens are quite of the normal type ; so that the shortness of their tails must be merely owing to individual variation. 23. TAPIRUS ROULINI, Fisch. T. ecuadorensis, Gray. Two young specimens, Sarayacu. Mr. Buckley had obtained a fine series of about fifteen or sixteen adult specimens of this Tapir; but, unfortunately, before the skins were prepared, a troop of native revolutionary soldiers put in an appearance and cut off the hoofs of every specimen to make into amulets, so that the whole series of skins was perfectly useless for scientific purposes. Mr. Buckley was so vexed at this misfortune that he did not even care to prepare the skulls, which would have formed a very interesting set. 24. CARIACUS (COASSUS) RUFINUS, Puch. Four specimens, three adults and one young, Sarayacu. 25. CARIACUS (COASSUS) NEMORIVAGUS, F. CUV. Four specimens, two adult and two young, Sarayacu. 26. SCIURUS STRAMINEUS, Eyd. & Soul. One male specimen, Balzar. 27- SCIURUS ^ESTUANS, Linn. Tv»o specimens from Intac, and one from Balzar. Under the heading of S. griseogenys, Gr., Mr. Alston, in his late |