loyo Veterinary Obstetrics 



sometimes undergo aberrations which lead to more or less seri- 

 ous consequences, not only for the integrity of the teeth, but 

 also for the usefulness or the life of the animal. Some of these 

 aberrations take place early in fetal life, and at the time of birth 

 have acquired such proportions as to imperil the life of the ani- 

 mal. This is especially true of the follicular cysts, of the com- 

 pound follicular odontomes, and of the composite odontomes of 

 the superior grinders. In these forms of aberrations in the de- 

 velopment of the teeth, large cysts filled with lymph press their 

 way into the sinuses of the face or into the nostril, and, by their 

 great size, cause much deformity of the face, and such pressure 

 upon the nasal passages as to threaten the death of the young 

 animal by asphyxiation. 



When odontomes, especially large ones of the cystic variety, 

 are present at the time of birth, the foal at once shows difiiculty 

 in respiration, because of the pressure upon the nasal chamber. 

 There is bulging of the face over the area of the cyst, unilateral 

 breathing, and a marked increase in resonance over the area of 

 the cyst. 



The prognosis of odontomes is usually highly favorable under 

 proper surgical handling, and equally unfavorable if neglected. 



The surgery of odontomes is usually demanded for the colt or for 

 the adult, and only very rarely for the new-born foal. We have 

 observed and recorded odontomes which have threatened the life 

 of the foal before reaching the age of 90 days, and other writers 

 have observed them at the time of birth. Since we usually do not 

 obtain clinical evidence of their presence until after the colt has 

 attained some age, it is not desirable to deal extensively here 

 with their handling. Instead we merely draw attention to the 

 occurrence of these in the new-born or very young foal, and refer 

 the reader to the more extensive literature upon the subject in 

 special surgery. 



12. Rupture OF the Extensor Pedis Tendons in the 

 Anterior Limbs of the New-Born. 



We have had occasion to observe, in the vicinity of Ithaca, 

 N. Y., six cases of rupture of the extensor pedis tendons, of new- 

 born foals, in the region of the carpus. How common the disease 

 may be, we cannot say, since there are few records of its occur- 



