552 GEORGINA SWEET. 



glandulai" material (figs. 1 — 4, l-g-)) which, as will appear 

 later, is undoubtedly the representative of the lachrymal or 

 Harderian glands, probably both, of normal forms. The 

 histological structure of this mass, which often occupies luost 

 of the conical capsule, shows it to be a true serous gland, 

 comparable exactly to the parotid of the same and other 

 animals. In one instance, in which the whole head had 

 been cut in a series of transverse sections, on one side there 

 was seen an even greater development of glandular material 

 outside and posterior to the conical capsule, and extending 

 immediately beneath the dermis. It was, however, con- 

 nected anteriorly with the gland inside, with which its duct 

 also communicated. In two other eyes, which had been 

 removed for sectioning purposes, there was a similar large 

 development of gland outside the capsule. In these speci- 

 mens the conical capsule is more or less undefined and irreg- 

 ular in its posterior portion, but is normally definite ante- 

 riorly. In harmony with the broken character of the outer 

 capsule in the two latter cases, and the overflow of the gland 

 beyond the capsule to which it is usually confined, the 

 muscle bands appear to lie in a special mass of connective 

 tissue which is here strongly developed, but anteriorly they 

 end, one or sometimes two, in the conical outer capsule, and 

 the others in the connective tissue outside the capsule in- 

 stead of inside it. These arc really the most degenerate cases. 

 Embedded in the gland mass within the cone lies the pyri- 

 form remnant of the eye proper (tigs. 1, 3,4, pi. 31), generally 

 •87 mm. to "96 mm. behind the front of the tube. It always 

 lies closely apposed to the bony wall, from which it is only 

 separated by the periosteum and the conical capsule. The 

 gland mass does not enter this part of the cone (figs. 1 and 4) ; 

 it appears to do so in fig. 3 to a small extent, but in the 

 succeeding sections it is quite absent here also. In front of 

 the eye a varying amount of gland is present, and also some- 

 times a small fibrous band, running straight, forwards and 

 outwards, for a very short distance from the pigment wall, or 

 a line of pigment in a similar position. The main feature of 



