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Appendix. 
Results of Investigation, in the Mammalian Series, of the communication 
between the first and second dorsal nerves. 
The results are given under three headings :— 
(i) Presence or absence of the communication. 
(ii) Size of the communication relative to the second dorsal nerve. 
(iii) Relation to the sympathetic chain. 
The expression “ Uncertain relation ’’ refers to the fact that from 
naked-eye examination alone one could not be quite certain 
that the communication was to a large extent an outlying part 
of the sympathetic chain although this seemed probable. 
3 
The expression “ Connected to sympathetic chain ’ 
Hig. II. 
Where the communication is clearly largely sympathetic in 
constitution, it is referred to as “ outlying part of sympathetic 
chain.” 
If no naked-eye connection with the sympathetic chain is 
present, the condition is recorded as unconnected with sym- 
pathetic chain. 
is illustrated by 
Simidae: 
Anthro-popithecus troglodytes: 
(a) Absent 
(b) Absent 
(c) Absent 
Simia Satyrus: 
(a) Absent 
(b) Absent 
Hylobates Sp: 
(a) Absent 
Cercopithecidae: 
Semnopithecus rubricundus: 
(a) No. 58: Present; size of half D 2; outlying part of sym- 
pathetic chain. 
Semnopithecus entellus: 
(a) No. 63: Present; closely associated with sympathetic chain. 
Cercopithecus cynosurus: 
(a) No. 64: Present; size = 1/, of D 2; closely associated with 
sympathetic chain. 
