152 JOHN SUNDWALL 



II. GROSS CHARACTERISTICS 



The following description of the lachrymal gland in the ox is 

 made from careful dissections after embalming heads and in- 

 jecting the arteries. 



Gross structure and relations 



The gland in general is a flattened oval or almond shaped 

 structure situated on the superior contour of the bulb, with an 

 auricular appendage which descends on the outer or posterior 

 contour of the bulb. The gland is more or less moulded to 

 conform with the bulb and the bony orbit so that the superior 

 surface of the oval mass as well as the outer surface of the ap- 

 pendage is convex in contour while the surface directed towards 

 the bulb is concave. Both surfaces possess the characteristic 

 glandular lobulations. 



The anterior or outer margin of the gland including the ap- 

 pendage measures on an average from 5 to 5.5 cm. in length. 

 The long axis of the superior mass is from 3 to 4 cm. in length, 

 the average width of the mass being 3 cm. and its average thick- 

 ness 1 cm. The superior mass is generally termed the Pars 

 superior while the appendage is known as the Pars inferior or 

 accessorius. The Pars inferior or appendage generally measures 

 about 2 cm. in length, 1 cm. in width, and 4 mm. in thickness, 

 but this portion of the gland is subject to much variation. 



The weight of the entire gland mass averages in the adult 

 ox from 6 to 7 grams. The weight of the appendage (Pars 

 inferior) is from 1 to 1.5 grams. It will be seen from a com- 

 parison of these weights that the larger mass of the gland is 

 confined to the Pars superior. 



The Pars superior is situated on the superior and posterior or 

 temporal half of the Bulbus oculi while the long axis of this oval 

 shaped mass is directed obliquely posteriorly and median ward. 

 The anterior pole is located immediately above the insertion of 

 the M. levator palp. sup. and M. obliquus sup. This corresponds 

 to a point immediately behind the center of the Margo supra 

 orbi«talis. From this point, the lateral margin of the Pars super- 



