148 AN HOUR AT 



carefully into the vessel containing them ; and the spirit flying to 

 their heads, poor things, they forget to withdraw their beautiful 

 plumes. 



Probably, Glycerine and Water (increasing the proportion of 

 the former as the latter evaporates) would be the best way to 

 mount them. Goadby's fluid, a solution of Bay-salt, is apt to leak 

 out, and weak spirit is a very treacherous material. 



On making sections through the Polypidom, numerous open- 

 ings are seen in the horny walls, whereby circulation, nutrition, and 

 consentaneous action are secured, through the medium of delicate 

 nervous threads. 



[Whiskey, pure Alcohol, Carbolic Acid, and other like things, 

 have all been recommended, and tried with more or less success, 

 for the purpose of instantaneously killing the Polyzoa with their 

 tentacles exserted. We have not tested it personally, but very 

 probably tl\e process with Picro-Sulphuric Acid, used by Professor 

 Entz, and described in Part II. of this "Journal," will be found 

 as effective as any. Only care must be taken, in applying it to 

 such species as have calcareous Polypidoms, to eliminate the acid 

 as soon as possible. — Editor?^ 



Haematopinus suis (Hog-Louse), (PL 15, lower half). — The 

 points specially to be attended to in observing these creatures 

 are : — The rostrum, which is highly curious ; the stiff bristles 

 (whiskers) on either side of the mouth ; the tactile papillae (having 

 probably gustatory functions), which terminate the antennae ; the 

 eyes seated on stout projections immediately behind the last- 

 named organs ; the large metathoracic spiracles ; the singular and 

 not unpleasing design on the dorsal surface of the abdomen, 

 which may be compared with that of the same part in the Pigeon- 

 Tick, Argas reflcxiis ; the six pairs of abdominal spiracles, of 

 which the first pair differ much n outline from the others ; 

 the male organs of generation; the powerful limbs, and varied 

 structure of the parts composing them. Hccmafopi7iiis suis is a 

 capital type of the genus Haematopinus, and of the suctorial 

 division of the Anoplura. 



[This louse is identical with a human parasite prevalent on 

 beggars — one of three kinds which honour humanity with their 

 company. — A. Nicholson.] 



[Denny gives the following additional particulars which may 

 prove interesting : — " This species is found in great numbers on 

 swine, but it does not appear so generally spread as might be 

 expected from the dirty habits of the animals. It most frequently 

 occurs on those freshly imported from the Sister Isle, 



