338 
W. H. DALRYMPLE. 
amount of disturbance which is sometimes fatal in the human 
subject. 
The following nematodes are found in the digestive canal 
of the dog : The ascaris marginata, spiroptera sanguinolenta, 
tricocephalus affinis, tricocephalus depressiusculus, and doch- 
mius trigonocephalus. The tricosoma plica, is found in the 
bladder. The filaria immitis, in the heart and blood-vessels. 
And, the filaria trispinulosa, in the capsule of the crystaline 
lens. 
I have not alluded to the intestinal parasites of poultry, but 
I might just mention that something like io species of cestodes, 
7 trematodes, and about io nematodes have been described. 
The third section, or arthropodes, I will merely touch upon, 
as I have already occupied too much time. Of the four classes : 
Crustacea, arachnidse, myriapodes, and insects, the arachnidse 
and insects alone contain species which are parasitic in the do¬ 
mestic animals. I cannot afford to gc further into this section, 
as it would only lead me deeper into a subject, with which, 
although of intense interest from a natural history standpoint, 
I have already taken up considerable time. 
I must confess, Mr. President, that when I commenced this 
paper I felt extremely doubtful as to my ability to put enough 
into it to occupy more than ten or fifteen minutes reading, but 
the subject is so comprehensive and expansive, that as I became 
more interested in it, there seemed to be much more difficulty 
in knowing just when to stop, than what more to say. There is 
a great deal more that could be said, however, but I must now 
draw to a close. I must repeat what I said at the commence¬ 
ment : that the veterinarian, as a rule, has rarely an opportun¬ 
ity to specialize. The calls upon his services are of such a gen¬ 
eral and diverse character, that he has to be “ all things to all 
men,” so to speak. He may be asked one minute to prescribe 
for a dyspeptic cat, the pride and joy of some fastidious old 
maid ; the next, to investigate, control, and eradicate an epi¬ 
zootic of some contagious disease, and the next, perhaps, to per¬ 
form some delicate piece of ocular or laryngeal surgery. To 
