186 Miscellaneous. 
of connective tissue containing oval nuclei. From the reservoir the 
vas deferens is separated off, the epithelial cells and nuclei of which 
are larger than those of the reservoir. ‘The vas deferens runs for a 
time within the testis, forms loops there, and, after issuing there- 
from, makes several loops, rolling itself into a little ball, and then 
passes into the seminal vesicle. 
‘The epithelial cells of the seminal vesicle (vesicula seminalis) are 
very columnar and ranged in annular cylinders (‘‘ Ringwalzen ”). 
These cells are of a glandular nature. On the outer side of the 
epithelium lies an extraordinarily thin connective-tissue membrane, 
and then follows a muscular layer, which we do not find upon the 
vas deferens. The deep-lying lay er consists of circular and the upper 
layer of longitudinal museles. In addition to the closely adhering 
thin connective-tissue membrane, which envelops the entire vas 
deferens and the seminal vesicles, these two organs have a special 
membrane, which is not closely adhering and is a prolongation of 
the testicular membrane. This membrane completely conceals the 
vasa deferentia. 
The seminal vesicle narrows into a bow-shaped canal, which opens 
not into the ductus ejaculatorius, but into the glandulae mucose. 
The epithelial cells, which clothe this canal, are very highly vacuo- 
late, so that they have a spongy appearance. Blind tubes which are 
described by R. ‘Leuckart * as appendages of the glandule mucose, 
and figured in his chart (‘Anatomie der Biene’ ‘ are nothing else 
than severed muscles which are attached to the wall of the abdo- 
men, and were described by Swammerdam. 
The glandule mucose have, beneath a thin membrane of connec- 
tive tissue, a layer of longitudinal muscles ; under this is a layer of 
circular muscles, and then, in addition, we have three groups of 
deeply-lying longitudinal muscles, which are only developed in that 
portion of the organ which is nearer the ductus ejaculatorius. These 
longitudinal mroneles press the epithelial layer of the mucous glands 
into three longitudinal folds. Towards the other end of the mucous 
gland the deep-lying muscles grow continually narrower, until they 
finally disappear altogether. Beneath the muscular layer lies a 
structureless Sane of connective tissue, and then a layer of 
narrow, columnar, glandular epithelial cells, with oval nuclei. 
The ductus ejaculatorius is inserted by means of two chitinous 
branches into the junction of the two glandule mucose. This 
paired portion of the ductus ejaculatorius is completely hidden 
beneath the muscular layer of the glandule mucose. ‘The ductus 
ejaculatorius, as well as the entire copulatory apparatus, is devoid 
of muscles. (In Girard? and Cheshire= we find it incorrectly 
stated that the ductus ejaculatorius has a strong musculature.) 
Beneath the yery thin membrane of the ductus ejaculatorius lie 
* R. Leuckart, ‘Die Anatomie der Biene:’ Cassel und Berlin, 1885, 
p. 18. 
+ M. Girard, ‘ Les Abeilles :’+Paris, 1885. 
{ Cheshire, ‘ Bees and Bee-Keeping:’ London, 1887. 
