4IO 



FCETAL DYSTOKIA. 



laire's Heterotypians, in which the smallest of the foetuses is attached to 

 the »nterior part of the body of the other, at or near the umbilicus ; the 

 Heteraliafis, in which the parasitic foetus is very incomplete, and perhaps 

 reduced to a single region — as a head without a body — attached some 

 distance from the umbilicus ; the Polyg7iathia?is, in which the parasite is 

 reduced to the mere fragments of a foetus — the jaws and some cer*haiic 



Fig. 99. 

 Sysomian Monstrosity: Dicephalus bicollis (Gurlt). 



remains adhering to the jaws of the other foetus. All these are included 

 in Gurlt's classification, which we would advise the veterinary obstetrist, 

 as a rule, to employ. 



The Polymelian Qj.iXo';, limb) monstrosities — Gurlt's Melodidymi — com- 

 prise those creatures which are so frequently exhibited in public, and in 

 which there is only a single body and head, but supernumerary limbs. 



Fig. 100. 

 MoNosoMiAN Monstrosity : Dicephalus hi-atlanticus (Gurlt) : Calf. 



These limbs may vary in number, and be attached to various parts of the 

 complete foetus ; there may also be present, in addition to the supernu- 

 merary members, an unformed kind of tumor resting on the back or 

 shoulders, which in one case has been recognized to be composed of the 



