GREEN PIGMENT-DEGENERATION OF THE HEART. Ill 



he, with severe pain, passed a hard, flattened, spherical con- 

 cretion, of a light-brown colour, about two inches in diameter. 

 His diet consisted principally of oatmeal and milk. The 

 tumour still remains, and occupies a large portion of the 

 abdomen. The concretions (of which he has passed several 

 about the same size and character) appear to consist of com- 

 pact masses of the beard of the oat. 



Mrs. G. brouglit her son, a boy four years of age, who, she 

 feared, had got the itch : the eruption appeared suspicious, 

 but did not occupy the usual situations on the body. With a 

 small pair of curved scissors I snipped oft" a pustule, in which 

 I detected two ova of the Acarus Scahiei: this settled the matter 

 at once. 



This leads me to state that I have never seen a good repre- 

 sentation of the mandibles of the Acarus. In a large and 

 beautiful engraving, in the possession of a friend, there is 

 only a slight indication of teeth up the centre of the head, as 

 though the mandibles were single m.embers. Having 

 recently mounted a specimen, which shows the part so well, 

 I have given a drawing (Plate VIII., fig. 3) ; also the mandibles 

 of some other AcaridcB. A mandible consisting of a single 

 member, appears, so far as my observation goes, to be the ex- 

 ception and not the rule in the Acari. 



The mandibles of Acarus of the domestic Fly (fig. 6) 

 appear to be a pair of simple forceps ; whilst those of the 

 Water Rat (fig. 14) seem to be a combination of forceps 

 and scissors. There are two Acari of the Mole (which has 

 its peculiar Flea, also), one (fig. 11) with the mandible fur- 

 nished with four barbed hooks, and the other (fig. 12) with 

 only a single hook, similar to that of the rabbit (fig. 13). All 

 the other specimens have double crab-like m.embers. 



On a Case of Green Pigment-Degeneration of the Heart. 

 By Dr. Tiiudichum. 



In March last I gave to the Pathological Society of London 

 an account of a case of green pigment degeneration of the 

 heart, which has been published in the sixth Aolume of the 

 Transactions of that Society. In a foot-note on p. 141 of the 

 Transactions, I stated that I had since had an opportunity of 

 examining the heart of a man, aged fifty-four, who died of 

 disease of the brain (apoplexy from atheromatous arteries), 

 which presented features analogous to those described in my 

 first observation. 



