1(3 Th. Lewis. 



B. Aves. 



Our present knowledge of the distribution of liœmolymph glands 

 in birds is not abundant. Vincent and Harrison^) have seen them in 

 the fowl and turkey {Oallus hankiva and Meleagris gallopavo), one 

 occurring in the former below the sternum, others in the fat sur- 

 rounding the stomach and rectum. I have searched in a number of 

 birds, including the pigeon, rooJc and jacMaiv, but have only seen 

 them in the fowl, and one small solitary gland, typically hœmal, in 

 the omentum of a pheasant (Fhasianida coUhicus). Those found 

 in the fowl occurred in the neighbourhood of the stomach, and in 

 the neck, and were small spherical bags of a blood-red colour, about 

 1 mm to 1 cm in diameter. 



C. Beptilia. 



No hsemolymph glands have as yet been discovered in this group 

 of the Vertebrata. 



D. Amphihia. 



Two small bodies, closely resembling typical hsemal glands in 

 appearance have been found in the toad {Bufo vulgaris), and were 

 situated on the surface of the gall bladder. These were probably 

 accessory spleens, 



E. Pisces. 



Balfour [i] described the ^liead kidneys" in ganoids and teleosts 

 as consisting of adenoid tissue, and in many cases noticed the 

 presence of blood sinuses. In 1897 they were further described by 

 Vincent [17a]. In the contribution of Vincent and Harrison^), a short 

 paragraph is devoted to these organs, in which their similarity to 

 hœmolymph glands is noted in the case of Cyclopterus lumpus. The 

 pronephros or "head kidney" of fishes forms in adult teleosts and 

 ganoids, as is well known, the degenerated adenoid anterior end of the 

 kidney. It is composed, as will be further described, of adenoid tissue 

 and blood sinus. 



^) Loc. cit. ^) Loc. cit. 



