140 F. H. STEWARI'. 



at the junction of oesopliagus and intestine. The nerve-ring 

 lies shortly behind the moatli and is surrounded by a ganglionic 

 collar. Generative organs indistinguishable as such. One of 

 the most prominent internal organs is the gland which will 

 be described below. 



I believe that this form is identical with A. capsularia 

 (Rud.) found in salmon and Gadidee, but as there are very 

 few points to distinguish Nematode larvae from one another, 

 this may not be the case, or several distinct embryos may be 

 included under the one name Dujardin (2 a) gives the length 

 as 27 mm., von Linstow (11 a) 19 mm. I have therefore 

 given the above description. 



In addition, A. capsularia is, of course, merely an embryo; 

 it should therefore not have a separate specific name, except 

 for convenience, until the adult form is identified. 



The gland which I propose to describe is interesting from 

 the fact that it is homologous with the ventral gland of free 

 Nematodes, and with, e.g., the poison glands of Strongylus 

 filaria (Rud.). 



It extends through the anterior six tenths of the body, 

 lying ventral to the alimentary canal (PI. 8, fig. 32, vg.), and 

 its duct, after a short course, opens in the midventral line 

 between the two subventral oral papilla) and immediately in 

 front of the ganglionic collar which surrounds the nerve-ring. 



The body of the gland (PI. 8, fig. 32 a) is composed of a 

 single gigantic cell, 15 mm. in length, "255 mm. in greatest 

 breadth, somewhat flattened between the body-wall and the 

 alimentary tract, tapering to the posterior extremity, and 

 rather blunt at the anterior. 



The body of the cell is composed of finely granular acidophil 

 protoplasm, the outer layer of which appears somewhat more 

 condensed, and stains with luBmatoxylin. 



The nucleus {n.) is a remarkable structure lying in the 

 anterior half of the cell. It is 6 to 7 mm. in length. In 

 transverse section its outline varies from linear to circular or 

 biconcave. It has a wall identical in appearance with the 

 outer wall of the cell; this encloses a vacuole containing 



