10 SOLENODON PARADOXUS. 
The mammae are two in number in both species, inguinal, or even post- 
inguinal, situated far apart, on a line just anterior to the genital opening. The 
number and position of the mammae are thus remarkably different from those in 
Centetes with its twelve pairs extending from the axillae to the groins. Potamo- 
gale, however, has but a single inguinal pair. 
The general body hair is long and coarse dorsally, becoming finer and 
slightly crinkled on the sides and venter. On the back two sorts of hairs are 
distinguishable: (1) the abundant shorter and finer hairs, and scattered among 
these, (2) single coarse hairs. The latter appear to have larger follicles and 
these, in a skin of S. cubanus that has lost some of the hair, are seen to be ar- 
ranged in oblique rows, at intervals in the dried skin of about5 mm. Ina young 
Solenodon paradoxus three days old (Plate 1, fig. 1), these coarse hairs are well 
developed, averaging some 5 mm. in length, and scattered at close intervals 
in similar oblique rows. With a hand lens the more abundant finer hairs may 
be seen at the bases of these larger ones. They are very minute and seem to 
be at least three between each two of the large bristles in a transverse row, while 
others are scattered between the rows. It seems not unlikely that the coarse 
spiny hairs present mainly in a longitudinal row on each side in the young 
of Centetes are homologous with these bristles in Solenodon. The further 
echinate development of the corresponding hairs in Centetes is seen in the adult 
that has scattered spine-like hairs over the dorsal area mingled with the more 
abundant finer hairs of the general body surface. The further development of 
a spiny dorsal covering such as is present in Erinaceus, would seem to be thus 
foreshadowed in these two genera. The statement of Verrill (:07) that the 
legs, snout, and tail are naked, and that the rump is bare, is not strictly correct. 
The rhinarium is quite hairless, as are also the soles of the feet, but the rest of 
the snout, legs, and rump are covered with minute hair, and small appressed 
hairs spring from between the scales of the tail. 
Color.— In the series of skins at hand there is great variation in the extent 
and intensity of the colors, and this appears to be independent of sex. The 
commonest type (Plate 3) has the dorsal surface of the head from the base of 
the snout to the ears and nape, black. The basal half of the hairs is pale buff. 
About the eye the long hairs are reflexed in a sort of rosette, and their pale bases 
thus form an encircling light-colored area. The black-tipped hairs extend over 
the mid-dorsal area of the back to the rump and are everywhere intermingled 
with pale, nearly buff-colored hairs, that give thus a grizzled effect to the dorsum. 
Ventro-laterally from the median line, the black hairs decrease in number, while 
