HIRUDO, HISTER. 197 
5—3. Hirupo. Spec. 17. 
medicinalis, (doctor’s leech,) elongated, olive-black 
with yellow ferraginous lines above, and spot- 
ted with yellow beneath. 
sanguisugu, (blood-sucker, horse-leech,) elongated, 
olive-brown, with an ochre-yellow marginal 
band. 
See MS. P. 
2—2. Huirunpo. Spec. 38. 
Section A. ‘Toes three before and one behind. 
rustica, (swallow,) front and chin chesnut ; tail- 
feathers, except the two middle ones, with a 
white spot ; bill black. 6 inches long. 
urbica, (martin bird,) bluish-black, white beneath ; 
tail-feathers without spots ; bill black ; mouth 
yellow. Five anda half inches long. 
riparia, (sand-bank martin, bank swallow,) cine- 
reous; chin and belly white; bill blackish ; 
throat encircled with a mouse coloured ring. 
pelasgia, (chimney swallow,) tail-feathers equal, 
naked and subulate at the tip ; body and bill 
brown ; chin whitish. Four and a quarter in- 
ches long. 
Section B. Toes all placed forward. 
apus, (steeple swallow, barn swallow,) blackish ; 
_ chin white ; feet small, scaly, fit for walking ; 
but adapted to clinging to walls. 7 or 8 inches 
long. Is much of its time on the wing. 
See M>. P. 
8—5. HistEer. Spec. 25. 
anieolor, black ; shells obliquely striate. 
See MS. P. 
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