A NEW ENTOZOON FROM THE EEL. 453 
But the systematist may claim a word. If our name is to be 
accepted, the giving must respect the methods which Science 
regards as Orthodox. Accordingly the following is offered as 
sufficiently technical to be precise; and yet perfectly appreciable 
by the popular judgment. 
KOLEOPS ANGUILLA Lockwood (gen. et sp. nov.). 
Description— Solid. Form, ve 
when in action the proboscis extended, making with, body two cones united at their 
bases. Length, less than a line when at res se abo 
of length. Proboscis encircled by rings of hooklets external to the cone and pointing 
ckward; when the proboscis is retracted, the hooks are internal to the cone, and 
point forward. Color tallowy-white, pellucid. At extremity an oral pore. 
Habitat.— In adipose ti the entrails of the mon eel, Anguilla acutirostris. 
Specimen taken from an eel caught in Raritan Bay, near Keyport, N.J. Spring of 1869. 
As to the use of those spiny circlets on the proboscis. While 
they can present but very little obstruction to the penetrating of 
that organ, the hold thus given the little Fig. 122 
parasite is very great; indeed it is cer- RREN 
tain that any attempt to dislodge it must 
fail, while these grapnels are buried in 
the tissue, and but for the peculiar mus- 
cular functions of the cone-like pro- 
boscis, its extraction must be fearfully ce eS 
lacerating, like the withdrawing of an E aee ARR of the 
arrow with many barbs. Certain it is Pi proposeis when withdrawn, 
that no human deyice could extract that cone. ee 
tiara shaft of spiny rings, from the living tissue, without in- 
flicting an agony beyond expression. When the butcher lifts 
the meat off his shamble hooks, he does it with a motion suited 
to the form of the hook, that he may not tear the meat. When 
Koleops would retract its thorny shaft, the process is begun at the 
extreme point, which of course is at the bottom of the wound ; and 
how deftly, easily, yea, perhaps painlessly, this is done. Involu- 
tion is begun at that extreme point. The end of the proboscis sinks 
downward within itself. In fact, it is not a withdrawing in the 
ordinary sense; for that would make the entire organism move at 
ate) and every barb would tear. It is a gradual involving, begin- 
ning at the point, and of course, the first circlet of hooks is by 
this involving, everted from its hold, and inverted as respects the 
deepening crater of the now shortening truncated cone. Given 
eae, Fap of seamen pan a solution gu e 
? Itis to be observed that the instan po 
the proboscis reénters the neck on its return into the body, the 
