SELECTED NOTES. 128 



inside of the short plated tube under the stage of the microscope ; 

 the luminous rays thus faintly and obliquely transmitted prove 

 quite efficient in rendering the markings on PleurosigjJia plainly 

 visible under objectives of ^-in. focus." 



TuFFEN West. 



Sclcctc^ IRotcs from the Society's 

 motc^Boohs. 



Pupa of Gnat. — In this object the imago may be distinctly 

 seen beneath the pupa skin, wings, legs, antennae, proboscis, etc., 

 and ready to emerge. The escape of the insect is a curious and 

 interesting sight, and not difficult to be seen, but it is soon accom- 

 plished and hence requires promptitude to witness. In this respect 

 it differs from the Dragon Fly, which according to my experience 

 requires two hours to perfect its transformation. This sight is still 

 more interesting. [On Plate IV., Vol. 4, will be found copies of 

 four drawings by Mr. West, showing the development of the imago 

 within the pupa case. On p. 44 of the same volume is a descrip- 

 tion of the plate. — Ed.] Fred Fitch. 



Filaria Bronchialis from a Calf (PI. XIII., Figs. 4, 5, 6). — 

 These animals are found in great numbers in the bronchial tubes 

 and tracheae of sheep, calves, fowls, turkeys, etc., giving rise to the 

 " Husk " in the former, and what is known as the " Gapes " in the 

 latter. The ova are supposed to be taken in either through the 

 water or grass. Some species of this entozoon are found in man, 

 giving rise to a disease very fatal in tropical countries. 



The best treatment for animals affected with Husk or Gapes 

 is the vapour of turpentine, the animal or fowl being placed in a 

 box with a false bottom covered with shavings sprinkled with spirit 

 of turpentine. Some adopt the more heroic treatment of pushing 

 a feather moistened with turpentine down the throat. 



Thos. Partridge. 



Section of Medicinal Leech (PL XIII., Figs. 7 — 11) shows the 

 muscular system admirably. The course of the individual fibres 

 is readily made out, and they appear divisible into the following 

 groups : — 



I St. — Immediately under the skin is a sphincter-like circular 

 layer of fibres, seen in profile in the transverse, and as red points 

 in the longitudinal section. 



