ON JULINIA. 17 



PLATE 3. 



Fig. 26. — A portion of the testis, showing its racemose follicles containing 

 spermatozoa. Zeiss, y^^^^ hom. imm., 2. 



Fig. 27. — Part of the ovary, showing one ovarian follicle and a portion of 

 another, both in connection with the oviduct. D D, 2. 



Fig. 28. — Peripheral layer of ovum with its test-cells, surrounded by the 

 two-layered follicular wall. Zeiss, j^th hom. imm., 2. 



Fig. 29. — Transverse section of a young bud, showing included ova. 

 Zeiss, D D, 2. 



Fig. 30. — Transverse section of abdominal region of older bud. In this 

 section we see, besides the oesophagus, the intestine, and a large ovum, the 

 developing heart within its pericardium and the two associated epicardial 

 tubes. D D, 2. 



Fig. 31. — Optical longitudinal section of a bud of about the same age as 

 that represented in Fig. 30. The branchial sac and the paired rudiments 

 of the atrium are here shown. D D, 2. 



Fig. 32. — Transverse section of a vascular process, with its surrounding 

 space and adjacent portions of the test-substance. Large bladder-cells, small 

 test-cells, and pigment corpuscles are seen within the matrix of the latter. 



VOL. 37, PART 1. NEW SEE. 



