4i8 



FGETAL DYSTOKIA. 



This, it will be seen, was a variety o£ Gurlt's cy clops. Youatt gives a good descrip- 

 tion of the head of a cyclops foal in the V^eterinarian (vol. vii., p. 434). 



Pseud ENCEPHALi AN Monstrosity. 



The head of the foetus may prove a cause of protracted or difficult par- 

 turition, as we have seen when treating of hydrocephalus as a source of 

 dystokia, as well as in other kinds of anomalies, when it is either greatly 

 deformed or double. We are cognizant of only one instance in which 

 a pseudencephalian monstrosity {Ferocephalus pseudocephalus, Gurlt) gave 

 rise to difficulty in birth. 



Maw ( Veterinarian, vol. xxxiii., p. 450) attended a Cow in calf for the first time, and 

 which had been violently in labor for six hours. A shepherd had been attempting de- 

 livery, and found the fore legs of the fcetus presenting, the head being turned back ; the 

 latter was adjusted, but yet, notwithstanding considerable force, the calf could not be 

 removed. By skilful manipulation Maw succeeded in extracting it, when it was discovered 

 to have " a protuberance on its head about the size of a child's head, with hair on it, 

 and the tongue protruded from the mouth like a man's hand, withthe thumb and fore 

 fingers. On all the four feet were four digits, and the hind quarters and tail were like 

 those of a dog ; the legs were about six inches long, and there was no roof to the mouth 

 — this aperture freely opening into the nostrils. The Cow was much exhausted, but ulti- 

 mately recovered. 



Fig. 103. / 



SvsoMiAN Monstrosity: Dicephalus bicollis (Gurlt). 



Double-headed (Monosomian and Sysomian) Monstrosities. 



The occurrence of double-headed monstrosities is more common, per- 

 haps, than any other anomaly ; they are observed more particularly in rumi- 

 nants, though instances are recorded of their appearing in the Pig, and 

 even in the Gat species. 



We have collected reports of some three dozen cases, the large majority of 

 which refer to this anomaly in the Calf, and not one to the equine or asinine 



