OSTEOLOGY. 35 
incisor at the internal side of the tip and a similar condition exists in the second 
lower incisor of Talpa. 
The vertebrae of Solenodon paradoxrus are: cervicals, 7; dorsals, 16; lum- 
bars, 4; sacrals, 4; caudals, 24; total, 55. There is thus one more dorsal, one 
less sacral, and one less caudal than described for S. cubanus by Peters, whose 
account appears to be the only one on which our knowledge of the skeletal parts 
of S. cubanus other than the skull, is based. Dobson apparently follows Peters, 
though he states that his description of the myology is based on the dissection 
of aspecimen from Cuba in the Paris Museum.  Peters’s figure is very clear, and 
the additional sacral vertebra in cwbanus seems to be a caudal fused to the sa- 
crum since the first chevron bone is between this fused vertebra and the next 
following caudal vertebra instead of between the first and second free vertebrae. 
In possessing 16 dorsals, Solenodon paradoxus resembles Potamogale. Gym- 
nura has 15, as does S. cubanus, and certain species of Erinaceus. Centetes 
seems still more primitive in possessing 19, as does Chrysochloris. The lumbar 
vertebrae in Solenodon are reduced in number as in the latter genus, being but 
4, and thus fewer than in the other generalized Insectivora. Centetes is remark- 
able in possessing but two sacrals, though Solenodon paradoxus with four only 
shows a reduced condition as compared with related genera. The following 
table will show at a glance these differences. 
Vertebral Formulae of Insectivora. 
Ceryicals. | Dorsals. | Lumbars. | Sacrals, Caudals. 
Gymnura alba 7 15 5 5 25 
Erinaceus 7 14-15 6 7 6+ 
Talpa 7 13 6 & 12 
Myogale 7 13 6 6 27 
Potamogale ai 16 5 & 32 
Centetes : 7 19 5 2 7 
Solenodon cubanus 7 15 4 5? 23? 
Solenodon paradoxus, % 16 4 4 24 
Chrysochloris z/ 19 4 5 8-9 
The atlas of Solenodon (Plate 7, figs. 4, 5) resembles that of Gymnura in 
possessing a ventral median hypapophysis extending posteriorly from the 
anterior lip, but the remaining vertebrae are without hypapophyses, thus 
differing from Gymnura and Potamogale. The axis is large with a high broad 
crest and elongated transverse processes at its ventral margin, directed poste- 
riorly (Plate 7, figs. 8,9). At the fourth cervical vertebra the transverse process 
has also an anterior projection which increases somewhat in the two succeeding. 
