THE society's NOTE-BOOKS. 47 



insects is generally very great. I have just been examining a 

 series of Chelifers, Cheyleti, Mites of various genera (Trombidia, 

 Dermanyssus, Gamasus), and the Harvest-man Mites, and some 

 Ixodes. The essential differences are really very small, although 

 externally the creatures are very unlike each other. Their rela- 

 tive positions may be arranged thus : — 



Ixodes. 



i ^1 



Dermanyssus. Gamasus. 



I I . 



Cheyletus. Trombidmm. 



I I 



Obisium. Chelifer. Harvest-man Mites. 



(several genera.) 

 H. M. J. Underhill. 



Anguinaria Spatulata (PI. 3, central portion) is so called 

 from Angiiis, a snake, to the head of which the cells of the 

 Anguinaria have some resemblance. The snake Coralline is 

 described by Johnson as parasitical on the smaller sea-weeds, 

 " not common." It invests those species chiefly whose stems 

 are clothed with hair-like fibres, as Dasya coccinea, Griffithsia 

 equisetifolia, etc. ; but is found occasionally on smooth-stemmed 

 species, as Plocamium coccineum. The Micrographic Dictionary 

 says there are only two British species — A. spatulata and A. 

 truncata. Anguinaria is a genus of marine Bryozoa, of the sub- 

 order Cheilostomata, and family Eucratidse. J. Ford. 



Fig, 1 represents the whole animal, slightly enlarged ; Fig. 2, 

 Head of the same, more magnified ; Fig. 3, one of the Setae. 



Kidney of Rabbit (PI. 5). — I herewith enclose a drawing 

 of the Section of Kidney of Rabbit (Fig. i), accompanied by 

 copies of figures from " Quain's Anatomy," representing at Fig. 2 

 the course of the Uriniferous tubules in the Human Kidney ; 

 and at Fig. 3, one of the Malpighian bodies (also Human), with 

 its contained glomerulus of blood-vessels. It will be noticed 

 that in Fig. 2 the large tubules which open in the interior of the 

 Kidney are represented as ascending into the cortical substance 

 of the organ and descending again as loops before entering the 

 Malpighian bodies. In Fig. 3 the tubule is seen at the upper 

 portion, and the afferent and efferent blood-vessels at the bottom. 

 A casual inspection might give the idea that the Malpighian 

 bodies were botryoidal or grape-like clusters of cells, but closer 

 examination will reveal their structure as convoluted tubes. 

 These bodies appear to be the secreting elements of the organ. 



A. Hammond. 



