186 



were felt underneath the skin. Two of these nodule.s 

 were situated close to the lateral line on the ocular side of 

 the fish. Each was a little rounded mass about 3'5 mm. 

 in diameter and about one mm. above the general surface 

 of the skin. Tust behind the anus was another tumour 

 which, however, was rather larger and more irregular in 

 shape than those on the side of the fish. It was situated 

 on the posterior and lateral lips of the anus. 



Fig. 9, pi. X\'I., represents a section of the latter 

 tumour in a longitudinal ])lane. The skin over tlie sti-ucture 

 is quite normal. Directly underneath the skin is a great 

 number of egg-like structures, each from 0"1 to 0'16 mm. 

 in diameter. Each (fig. 10) is surrounded by a thick, 

 apparently structureless, capsule. Within this the cell 

 protoplasm is finely granular, and stains densely. Eound 

 the periphery of this cell (for the whole structure is 

 obviously a single cell) are a number of inclusions, 

 consisting of densely staining substance of apparently 

 quite irregular form. The cell substance is usually 

 contracted away from the capsule at various points. The 

 nucleus is large, and is bounded by a kind of shell — 

 not a membrane, but a thick layer, which in section 

 presents a kind of scalloped appearance. The nucleus is 

 often vacuolated. Within it is a single large, denselv 

 staining nucleolus. 



ExPLAJsATlON 01' THE PLATE. 



Peate XVI. 



Fig. 1. — Aiithobotlu'ium uiu'icnlatum. Section of a proglottis, x 70. 

 ,, "i.— Do. do. The scolex. x 17. 



., 3. — Fungus in kidney of plaice. Section of the kidney. 



X about 100. 

 ,, i. — Fungus in Plaice, germinating spore, x 60U. 

 ,, 5-6. — Do. conidia. x GOO. 



,, 7-8. — Do. resting spores, x 600. 



9.- Tumour from dab. Section, x 21, 

 ,. 10. — Uue body from the tumour. ■- -i^O. 



