Sabin. 



i.il to the myotomes and open in pan into tl aenta] 



I \ n i j > 1 1 hearts and in pari into the axillary Binus, and ( • "> and 6) the 



bral lymph trunks. The Bubvertebral lymph trunks are 



- with many an rhich extend from the tip of 



the tail to a point opposite the Btomach, where they unite to form a 



rna chyli. From the cisterna chyli four vessels run forward to 



ciliary plexu6, the paired thoracic duel and the two paravertebral 



lymph truii 



The axillary lymph sacs open by three or four branches into the 

 cardinal veins and receive the following vessels: (1) The lateral 

 superficial lymph trunks; (2) the paravertebral vessels; (3) the thor- 

 duct; (4 - of the cranial part of the stomach and esopha- 



a vessel which run- in the groove between the pericardia] 

 and pen: . -: (6) a vessel which comes from 4;he base of the 



skull: (7) superficial vessels fron ide of the head, and (8) the 



lymph i the fori legs. 



B des thi axillary sac there are two other sacs or sinuses, one of 

 which lies dorsal to the aorta at the base of the heart, namely, the sinus 

 lyinphatieus cordis ( Hoyer 19b, fig. 5), and is in the course of tin- jug- 

 ular lymph trunks and the other of which make- the paired sinus of 

 the inguinal region. 



The segmental lymph hearts receive three groups of vessels: (1) 

 branches from the Bubv< lymph vessels (which agrees with 



Marcus 87a, in Gymnophioncni : (2) dor.-al and Neu- 

 tral segmental branches, and (:S) the longitudinal lymph trunk. 

 They open into the vena lateralis. The segmental lymph heart- and 

 nus lymphaticus cordis have striated muscle in their walls. It 

 is clear that a knowledge of the origin of this system would be of 

 great value. ; i- Hoyer says: " Ers1 wenn die beriihrten noch zwi 

 haften Punkte durch weitere Untersuchungen vervollstandigt -em 

 werden, w i id eine gewisse Grundlage zu vergleichenden Betrachtungen 

 Lymphgefassystems der niederen Wirbeltiere geschafiEen -em" 

 I I !'h. p. 555). 



imsen (145) and Huntington i'<'.) have worked on the de- 

 velopment of the lymphatic system in reptiles. Strom-en shows that 

 the posterior lymph hearts develop in relation to the coccygeal veins. 

 He describes the process mbination of veins and dilated spaces 



similar to Sala's decription for the corresponding hearts in birds. 

 Thi- method of formation has now been disproved by the observation 



