500 PHYSIOLOGICAL SERIES. 



into the rest of the cord, and are thus not very definite 

 although in fact well developed. O. C. 1364 B. 



Presented ly J. Holm. 



D. 784. Part of the spinal cord of a Calf (Bos taurus). The 



dura mater, except around the nerve-roots, and tin- arachnoid 

 and pia mater of the left side have been removed. The 

 arteries of the pia mater have been injected. The ventral 

 longitudinal furrow, occupied by u lamina of pia muter, 

 and the lateral dorsal furrows at the entrance <>!' the rootlet> 

 of the dorsal roots of the spinal nerves are also clearly 

 shown. 0. 0. 1365 B. 



D. 785. A portion of the spinal cord of an Ox (Bos tm 



stripped of its membranes. Parts of the dorsal and ventral 

 columns have been partially torn away and teased at their 

 free ends to show their ready cleavage in a longitudinal 

 direction, in accordance with the course of their component 

 fibres. 0. C. 1365 F. 



D. 786. The terminal portion of the spinal cord of a Calf (Bos 



taunts) stripped of its membranes, and showing the ventral 

 longitudinal fissure and the passage of the cord into the 

 tilum terminale. 0. C. 1365 o. 



D. 787. The posterior cervical and anterior thoracic region- of 

 the spinal cord of an Elephant (EUpha* iiid'n-nn). 



The dura mater and arachnoid have been reflected from 

 the dorsal surface, showing the loose Bubarachnoid tissue 

 and, at the cut margin of the membranes, the slit-like 

 Bubdural space. The rootlets of the dorsal roots of the 

 spinal nerves are very strongly developed at the brachial 

 swelling, and form an almost continuous series on either 

 side. 0. C. 1368. Hunterian. 



D. 788. Part of the thoracic region of the spinal cord of an 

 Elephant (Elephas indicus). The dorsal and ventral roots 

 of the spinal nerves are very dissimilar in their mode of 

 connection with the cord. The dorsal roots enter the cord 



