596 PHILOSOPHICAL TKANSACTIONS. [aNNO 1710, 



dyles; q llie external hole for the spinal marrow; rr the two middle fossae ; ss the processus petrosusj 

 tt the posterior fossa, or seat of tlie cerebellum j u the seat of the pituitary gland; x the crena. 



Fig. 30, represents the uterus; aa part of the ligamenta lata uteri; b part of the vagina cut off; 

 c the beginning of the body of the uterus; d divided into two portions, with an interstice in the 

 middle; ee several eminences, representing the external part of so many cellules; ff the coruua 

 uteri; g a loose membrane wrapped up, that the ovaria below may appear; h the ovarium stripped 

 of the loose thick membrane, which fluctuates above it; i the ovarium covered with the mem- 

 brane. 



Fig. 21, represents the proboscis cut transversely; aa the two cavities of the proboscis; b the sep- 

 tum, which divides the cavities; cc the tendinous intersection, which runs from the fore to the hinder 

 part; dd the tendinous intersection which nms from the right to the left; eeee the insertion of the 

 four muscles into the tendinous intersection, whereby the fibres of the one ascend, and those of the 

 other descend obliquely. 



Fig. 22, represents the dissected proboscis ; a the external part of the cartUage, which surrounds 

 the cavity of the proboscis, as it arises from tlie hole in the fore part of the skull; bb that pair of 

 muscles called the levatores proboscidis, raised from above the aforesaid cartilages, with their inner 

 surface turned up, that the divarications of the blood-vessels therein may appear; cc the orifices of 

 the veins dispersed in these muscles; dd the orifices of the arteries; ee their several branchings; f 

 the descent straight along, above the cavity of the proboscis ; gg the oblique descent of the fibres of 

 the erectores proboscidis; h the tendinous intersection running down the middle of the proboscis; ii 

 the orifices of the cavities of the proboscis. 



Fig. 23, represents the extremity of the proboscis cut off; a a protuberance arising from the fore 

 part of the extremity of the proboscis, and extended into a cavity in the back part b, whereby the 

 animal takes hold of any thing. 



Plate XV, fig. 1, represents one of the rudiments of the teeth, taken out of the large hole in the 

 inner side of the lower jaw, but much enlarged in proportion; a its upper part, which is hard, solid 

 and white; b its middle part distinguished by several furrows and ridges; c its lower part, which is 

 hollow, and into which enter, both the blood vessels, that serve for its noiu-ishment, and a branch 

 of the nerve, called maxillaris inferior, proceeding from the fifth pair. 



Fig. 2, represents a portion of the cuticula, wherein is shown its mner surface, and usual thick- 

 ness; at its margin on the left hand, and lower part, are several white lines, which Mr. Blair takes 

 to be the lineaments of so many blood vessels; the pyramids, from whence the hairs proceed, with 

 the several favi or depressions. 



Fig. 3, represents one of the scabs, adhering to the cuticula, where they are thickest. 



Fig. 4, the first vertebra of the neck, with its upper part in profile, to show the holes for the ver- 

 tebral artery; aa two protuberances, which reach on each side to the skull; bb two cavities shortened, 

 which receive the condyles of the skull; cc the two holes, whereby the vertebral artery proceeds 

 from the skull, and perforates this vertebra; dd two holes through which the artery passes out from 

 this vertebra ; ee a crena between the two aforesaid holes, where the artery is lodged. 



Fig. 5, the fore part of the first vertebra shown at large; a the hole for the spinal marrow; b the 

 hole for receiving the tooth of the following vertebra; cc two cavities for receiving the condyles of 

 the skull; dd two holes for the cervical artery; e the upper part of the vertebra; f its lower part; gg 

 the transverse processes, whose protuberances at the extremities are represented by aa. 



Fig. 6, the back part of the first vertebra shown at large; a the hole for the spinal marrow; b the 

 hole for the tooth of the following vertebra; cc the cavities which receive the body of the following 

 vertebra; d the lower part of the vertebra; ee the holes for the cervical arterj'; ff the two transverse 

 processes. 



Fig. 7, the fore part of the second vertebra; aa the forked extremities of the protuberance, which 



