56 MEMOIRS OF THE CARNEGIE MUSEUM 
the place of ears two holes bored, one laterally and one from the back, so as to meet 
each other at a right angle. 
As seen in the figure the eyes, teeth, and earholes are all formed with a hollow 
drill. The drilled teeth in this specimen are, however, executed in a manner differ- 
ent from that of the Costa Rican stone heads. The mouth consists of a row of four 
rings of equal size, which by a diagonal straight narrow groove are divided at the 
center, thus forming four half-circular teeth in each jaw. 
2. Mammal Heads. 
(a) (Pl. XXVI, Fig. 1.) Head resembling that of a dog, of grayish white 
quartz (?). Height 4.9 cm., breadth 7.5 em. (Cat. No. 4332.) 
(b) (PL XXVI, Fig. 2.) Small head of gray stone. Height 5.6 em., breadth 
8.4 cm. (Nat. Mus. of Costa Rica, No. 3361.) 
(c) (PL XXVI, Fig. 3.) Head of greenish-brown mottled stone, with large up- 
turned snout, very small eyes, and large prominent teeth. Height 4.4 cm., breadth 
6.2em. (Cat. No. 2332. 
(d) (PL XXVI, Fig. 4.) Small head with upturned nose. Height 5.4 em., 
breadth 9.9 cm. (Nat. Mus. of Costa Rica, No. 8922.) 
(e) (Pl. XXVI, Fig. 5.) Head of opaque white gypsum. It has a fantastic 
shape, nose protruding, skull provided with a small cap with narrow cylindrical top. 
Height 7.5 ecm., breadth 5.5 cm., diameter of central perforation 2.8 cm. (Cat. No. 
2431 
(f) (PL XXVI, Fig. 7.) Head of whitish quartz, round in shape, resembling 
that of an animal like a cat. ‘The eyes are formed of two borings, the first with a 
hollow cylindrical drill, and afterwards with a solid drill, which has left a conical 
pit serving as the pupil. ‘The mouth is represented by a row of three circular pits, 
the walls left standing to form the teeth. Height 5.5 cm., breadth 5.7 cm. (Cat. 
No. 2557. 
(g) (PL XXVI, Fig. 8.) Head of grayish-white stone, representing a monster 
with mouth wide open. ‘This specimen very plainly illustrates the application of 
the hollow drill. Height 8.2 cm., breadth 6.3: cm. (Nat. Mus. of Costa Rica, No. 
9092.) 
(h) (Fig. 68.) Head of fantastic monster. Both eyes and ears are represented 
by eylindrical knobs. ‘The former are placed very high up on the front, as is the 
nose also. ‘The wide open mouth is formed in a peculiar manner by two vertical 
rows each composed of three hollow drill-holes with the wall in the center left 
standing. The six cylindrical cores are not removed from the base, but cut off at 
