156 JOHN SUNDWALL 



convex surface is thinnest, averaging 0.5 m. Where the septa 

 take origin in this area it is much denser. The thickest portion 

 is found on the concave surface. 



It is composed of areolar tissue in general. Both collagenic 

 and elastic fibres are present in abundance. Numerous globules 

 of fat are seen singly and in groups irregularly distributed through 

 out, being more abundant around the large vessels. Small 

 lobules of gland tissue are also included within the capsule. 

 These are more numerous in the neighborhood of the exits' of the 

 main ducts. Smooth muscle fibres are also 'present irregularly 

 distributed. On the concave surface the capsule contains the 

 large blood vessels and nerves while on the outer margin of the 

 gland the large ducts are surrounded by the capsular tissue. 

 The elastic fibres are long and fine and are arranged parallel 

 to the surface of the. capsule, as described by FumagaUi ('97), 

 Riquier, and Schirmer. They are most numerous on the con- 

 cave surface where they surround the larger vessels. In the 

 region of the exits of ducts the elastic fibres are abundant also 

 and interlace more than elsewhere, forming a network around 

 the ducts. 



The interlobular septa 



The interlobular septa, which are derived from the capsule 

 and divide the gland into numerous irregularly shaped and sized 

 lobules, are composed of practically the same tissues described 

 in the capsule. Secondary septa take origin from two or three 

 large primary septa and enter the various lobules, forming the 

 supporting structures of the lobules and surrounding the various 

 vessels, nerves, and ducts, which are in close proximity to each 

 other. 



Observations in this laboratory regarding the capsule and septa 

 agree with those of Schirmer. However, I have failed so far 

 to see in the connective tissue framework of the gland — septa or 

 intralobular tissue — of either young or old Bovidae a constant 

 accumulation of lymphoid cells such as described by Schirmer 

 for man and Fleischer for the lachrymal gland of the ox. Axen- 

 feld and Gotz have also referred to lymphoid infiltrations in 



