442 



MR. W. E. HOTLE OX THE DEEP-WATER 



Fig. 8. The egg-follicle from the ovary of a mature egg-laying insect. 

 X 200. 



9. Transverse section of an egg. mc, micropyle canal ; ch, chorion ; 

 V, vitelline membrane ; cl, clear yelk ; y, granular yelk. X 30. 



10. A longitudinal section of an egg. mc\ chamber at anterior pole of 



the egg ; m, micropyle. 



11. A section of the yelk, a, clear margin ; granular yelk, x 400. 



12. The micropyle. X 400. 



13. A section through the micropyle. X 400. 



14. The testes of a larval blowfly, showing the union of the prolongations 



from which the duct is developed : after Weismann. 



15. The gum-gland and some of the adjacent fat-body. I, lumen of the 



gum-gland ; e, epithelium of gum-gland ; hh, capsule of fat-cells ; 

 a, c, d, stellate and flask-shaped cells enclosed within the capsule. 

 X 200. 



16. Transverse section of the gum-gland of the mature insect. 



17. Transverse section of the gum-gland of the immature insect. 



18. 19, 20. Epithelial cells from the gum-gland, with the contained 



corpuscles and nuclei in different stages of development. 



On the Deep-water Eauiia of the Clyde Sea-area. By "William 

 E. HoYLE, M.A. (Oxon.), F.E.S.E., Keeper of the Man- 

 chester Museum. (Communicated by John Murray, LL.D., 

 Ph.D., V.P.E.S.E., E.L.S.) 



[Eead 4th April, 1889.] 



(With Map : Plate XXIX.) 



Since the establishment of the Scottish Marine Station in the 

 year 1884, Dr. John Murray has conducted an extensive series of 

 dredgiugs in the greater number of the lochs of the west coast of 

 Scotland. During these operations he was struck, as Eorbes had 

 been before him, with the restricted distribution of certain forms, 

 as well as with the fact that some species occurred nowhere off 

 the British shores except in these depressions. 



In the summer of last year, Dr. Murray suggested that I 



