; 
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323* 
APPENDIX. 
Note to Art. XXXV. 
Ar this early period of the first anatomical season which has commenced since the 
description of the Trichina spiralis contained in the present volume was written, an- 
other example has occurred at the dissecting-rooms of St. Bartholomew’s Hospital of 
a male subject, with the muscular system similarly infested with this most interesting 
and remarkable parasite. Its numbers exceed, if possible, those in the cases already 
mentioned, every part of the voluntary muscles teeming with the minute white cysts in 
which the worm is contained. These cysts differ from those I have before examined in 
being more opake and gritty, so that the presence of the contained worm would not be 
suspected from a simple examination of their exterior, and it is probable therefore that 
the cysts first described in the Medical Gazette were in this state. The examples in 
which two worms are present in one cyst, are more common in this case than in the 
preceding. The Trichine when extracted were more lively than [ have ever seen them; 
and in every instance they have presented an opake or dark-coloured spot, about 
one fifth of the length of the body from the anterior extremity. On breaking across 
the recently extracted specimens, I have observed in several a retraction of the outer 
skin, leaving the substance which it envelopes protruding. 
Dr. A. Farre, who has observed the same appearances in several of the Trichine of 
the present subject, is of opinion that the projecting substance is the alimentary canal. 
I have not as yet been able to satisfy myself of its tubular structure. In one case the 
dark-coloured spot formed part of the protruded string. Is this body the ovary? If it 
be determined that there is an alimentary canal contained within, and distinct from the 
outer skin, then the Trichina would rank higher in the scale than I have placed it, and 
form a genus of the Celelmintha. I have not, however, in any instance seen a trace of 
an excretory or anal orifice.—R. O. 
November 18, 1835. 
