1 008 



Laterally from the point of decussation the muse, transversus 

 passes into a thin flat tendon that goes below the gland, lacrimalis 

 to the lateral orbital wall, and is inserted below the inferior edge 

 of the lachrymal gland into the latei-al orbital wall. 



After the decussation the muse, levator palpebrae splits in the 

 usual way into an upper- and a lower-sheet. The upper one soon 

 expands into a tendon, which is attached to the skin of the upper 

 eyelid, medially to the tartus sup. and to Tenon's capsule, and 

 laterally to the anterior part of the lateral orbital wall. The relations 

 of the lower sheet are somewhat anomalous. After the splitting up 

 of the upper sheet, the lower one passes into a strongly developed 

 sheet of smooth muscular tissue: the muse, tarsalis sup. The lateral 

 free border of the lower sheet has a length of about 3 mm. and 

 then blends with Tenon's capsule. The lower sheet now stretches in 

 the normal way towards the anterior and settles at the upper mar- 

 gin of the tarsus snp. ; the medial part of the sheet has the same 

 insertion points as the upper sheet, for on this side the two sheets 

 are united. The lateral part however is more expanded than usual. 



According to Virchow •) the two lateral borders of the upper and 

 the lower sheet lie over each other; in our preparation this 

 is not the case, for we see that the lateral part of the lower sheet 

 stretches more backwards. Now this part of the lower sheet unites 

 with the lateral expansion of the muse, transversus and thus the 

 two constitute a tendinous sheet, gliding below the lachrymal gland 

 to the lateral orbital wall and is inserted into it as a broad flat 

 tendon, 20 mm. across. This tendinous sheet is grown together with 

 Tenon's capsule as was obsei-ved above to be the case also with the 

 lower sheet of the muse, levator palpebrae. The orbital part of the 

 lachrymal gland is found for the greater |)art on the tendinous sheet 

 formed by the muse, transversus and the muse, levator palpebrae; 

 a small portion of it overlaps anteriorly the lateral border of the 

 upper sheet of the muse, levator. The conjunctival part of the 

 lachrymal gland is located between the two sheets ot the muse, 

 levator palpebrae. 



In the ricfht orbitn ') (Fig. 2) the aspect of the muse, transversus 

 is on the whole the same as in the left; in the former, however, 

 the muscle is more developed than the left. It also arises from 

 the anterior part of the lamina papyracea ossis ethmoidalis as a 



1) H. ViRCHOw, Über TENON'schen Raum und TENOw'sche Kapsel. Abhandl. der 

 Kön. Preuss. Akad. der Wissenschaften. 1902. 



2) In the right orbita the muse levator palpebrae is cut through, the better to 

 show the course of the muse, transversus. 



