ZOOLOGY. 367 
the same locality. It had been previously detected in Guysbo- 
rough, Nova Scotia. : 
Crepis aurantiaca, formerly called Hieracium aurantiacum, 
appears to be naturalized in some places in Saco, Maine. “It oc- 
curs in grounds adjoining a nursery, where it is associated with 
Ajuga reptans, a labiate plant. - Probably both plants were intro- 
duced in the material employed in packing foreign trees. 
ZOOLOGY. 
A REMARKABLE Monstrosity.— I submit the history, anatomical 
examination and physiological peculiarities of this case of lusus 
nature, as one of especial interest to embryologists. 
The subject, or subjects, are a pair of twin pigs united throughout 
the anterior abdominal, thoracical, cervical and cranial regions, 
having one umbilicus in common. As they now stand (Fig. 74), 
taxidermy having been resorted to, to 
preserve them, to ordinary observers, at 
first sight, their conjoint bodies present 
the appearance of two individuals stand- 
ing face to face, being in juxtaposition 
above the umbilicus, with arms extended 
at right angles. Below the inferior point 
of union both are perfectly normal; 
above this region the front side * resem- 
bles the inferior part of the thorax of a 
normally formed hog. The back side 
presents the same thoracic appearance, © 
but above it is seen the top of the head y 
(the region posterior and between the 
ears in a normally formed hog) with two 
X in juxtaposition at their point of 
Junction with- the head, situated in the 
median line, one and one-half inches posteriorly to the ones situ- 
ated in the normal position. 
Their external appearance, size, form and color are the same. 
Both are of the male sex. The head, anteriorly of the conjoint 
Pav of ears, is normal in shape, being but slightly broader in the 
* ee t 
The terms front, back, etc., relate to th igati whole, ri 
y 
? {=} 
= legs occupying the inferior position. ‘ 
