17 
Unclnarla amerlama {ind AgcJnjlostoina (hiodejude caiiso in iiuin the 
disease variously known as uncinariasis, uncinariosis, anchylostoiniasis, 
tunnel disease, miners’ anemia, brickmakers’ anemia, mountain ane- 
mia, etc. 
AgchyJostoma canhumt [Uhchun'ld canhia^'] causes a similar dis(‘ase 
in dogs, resulting, in some parts of the country, in a death rate of 
from 25 to 40 per cent of the pups born. Uncinariasis in dogs is 
exceedingl}^ common in Washington, I). C. ‘‘Ty])hoi(r' in cats is 
attributed to this parasite. 
Instructors in medical colleg'es who wish to demonstrate iK^okworms 
and their eggs to the students Avill tind ^1. caninum of dogs an excel- 
lent substitute for Agehylosfomn duodenal e of man in case the latter 
species can not be obtained. 
Unclnaria stenoeepluda occures in dogs, foxes, and allied animals, 
and is causing considerable troid)lc in the blue fox {Vulpc,s lag<g>ui<) 
industiy. 
Uitchiarla trlgonocepli(d<d is found in sheep and produces a serious 
anemia. This parasite has been met in Victoria and ( alhoun counties, 
Tex., where, in conjunction with the twisted wireworm {llH^numchus 
CO) dart it has caused the death of from 25 to 5o per cent of certain 
docks. 
TJncinar 'ut radtat<d^ is found in cattle, producing trouble just below 
the stomach. The writer has collected this ])arasite in Dewitt, 
Gonzales, Victoria, and Calhoun counties, Texas, and has seen speci- 
mens from Florida collected by Dr. C. F. Dawson. 
TJnclnaria Luca.'ii was found several years ago in the seal pups of 
Alaska by Mr. Lucas, after whom the worm has been named. It is 
responsible for about 17- per cent of the deaths of the pups. 
Still other species of hookworms are reported for other animals. 
None of the species from animals mentioned above is known to atfect 
man. nor has either Unclncu'ui amei'icana or Agchylnsionta duodoade 
of man been satisfactorily demonstrated to occur normally in other 
hosts than man. 
«This is Vnrtnnria rnnina (Enrolani 1859) Itiiilliet, 1900, a j)anisite of canim's and 
felines, which is usually known as Uiirlndriatrlf/oiutrejjhnld ( Kialolphi, ISOIC) liailliet, 
1885 [not Uncinnria trlfjo)io(rj>h(iln (Rudolphi, 1809) Raillict, 19(M)]. If rnrinarla 
and Agchiflustonid a.r{} reco^ni/e(l as distinct, V. caniuu should he placed in tlu* same 
genus as V. dnodmallx. I liave not yet tested the correctness of tin* sjtecilic name 
ranina for this form, hut it is lien* accepted on authority of Railliet. 
^ This is Uncinaria tngoiiorep)inln (Rudolphi, 1809) Railliet, 1900 [not “f. ingouo- 
cephidd Rudolphi, 1809)” Railliet, 1885]. Both Railliet and I have recently exam- 
ined Rudolphi’s original material, and it is unqiu*stionahly identical with I . cermm 
(Creplin, 1829) of sheep. This species is closely related to l\ uintTicanu. 
c Strongglnx contortux Rudolphi. 
^ Bunostomum jddehotomnm Railliet. 
19558 — No. lO— 2 
