MINUTE ANATOMY OF THE OMENTUM. 235 



divided muscle cells and the nuclei bounding the fibrous 

 tissue adventitia. 



In fig. 3, which represents in transverse section part of 

 the gland tubule forming one of the ceruminous glands of tlie 

 human auditory meatus, the structures described in the two 

 preceding specimens cannot fail to be recognised. The 

 appearance of the epithelial lining, however, is peculiar. 

 Between the free borders of the cells composing it and their 

 nuclei is a deposit of what appears under the microscope as 

 brown or yellow granular matter, giving the appearance of 

 a definite zone internal to the regularly placed nuclei. The 

 muscular coat is not so well marked as in the last specimen, 

 but with its darkly stained nuclei still forms a distinct layer 

 inside the"membrana propria,'* in this instance well defined. 



In a less marked degree similar conditions, with regard to 

 the position and appearance of the muscular coat, may be 

 seen in the large sweat-glands of the axilla. 



To sum up, then : it would seem that in the sweat-glands 

 of some animals, as well as in those of man, possessing a 

 muscular coat, the epithelium, lining the gland, is seated on 

 the muscular coat without the perceptible intervention of any 

 membrane; again, that the muscular coat is situated internal 

 to the membrana propria lying in the inner portion of its 

 substance ; a priori, it may perhaps be argued against the 

 above, that Histology up till the present time has furnished 

 no parallel where muscular tissue and epithelium are directly 

 in contact. Whilst fully admitting the weight of the objec- 

 tion, I would urge that the microscopic appearances detailed 

 in this paper admit of no other interpretation. 



The observations were conducted under the direction of 

 Dr. Klein. 



Contributions to the Minute Anatomy of the Omentum. 

 By Dr. E. Klein, F.R.S. (With Plate XVIII). 



I PROPOSE to describe in this short memoir (1) certain 

 bud-like structures occurring on the fenestrated portion of 

 the omentum of rat and dog; (2) the way in which the 

 fenestree are produced in the omentum of rodents and car- 

 nivorous animals ; and (3) some points referring to the new 

 formation of blood-vessels in the omentum of guinea-pig. 



Before proceeding to detail my observations, I wish to 

 say a few words as regards the methods used in this in- 



