
4, the animal removed. 
b, the branchiz: p, the penis or ovipositor : 
adductor muscle : 
ad, the 
c, the anus. 
5, portion of the same, 

m, the oral apparatus : 
p, the penis. 
s, thestomach: ¢, the testis: 
6, four of the cirri and the male organ 
and ovipositor of G. vittata. 
7, G. Hunteri (?) upon the carapax of a 
crab from Amoy ; here the eye is on 
the oral side of the adductor, the re- 
verse of it in Lepas. 
8, the Hermit crab, Pagurus Bernhardus, 
shewing the plan of its nervous system. 
9, the scorpion shewing its nervous system 


and ‘that a third column does not exist, 
a vessel having been mistaken for it. 
10, the nervous system of a Tarantula seen 
from below. 
11, a, b, c, shew the nervous system of a 
Scolopendron, the omitted ganglia being 
There is here no third 
column as has been described, that part 
being vascular, the longitudinal cords 
however seen alittle less enveloped by 
the ganglionic matter on the upper 
surface. 
12, a dissection of the caterpillar of a La- 
siocampa, principally to shew the ner- 
vous system ; much of the fatty matter 
and many of the tracheal tufts being 
removed. 
but repetitions. 

G TURNER, PRINTER, LIVERPOOL ROAD, STOKE-UPON-TRENT,. 

