On the anatomy, decay and development of the trichina spiralis. "From the Transactions of the Pathological Society for 1854." DESCRIPTION OF PLATE XV.

The figures illustrate Dr. Bristowo’s (and Mr, Rainey’s) Observations on the Development of the Trichina Spiralis. Page 274. Fig. 1. represents a fusiform collection of fat, in which an ovoid central portion is becoming separated from the rest by an indistinct membrane, which, in this instance, is almost solely indicated by the accompanying granular deposit. Fig. 2. The sides of the cysts are here tolerably perfect, but the ends are incomplete, so that the part within still communicates with that without, Fig. 3. The cyst is complete. Its cavity is filled with fat, and between the contained fat and the cyst wall several nuclei may be detected. Fig. 4. A cyst containing the fat cells and large numbers of nuclei. Its inner surface is somewhat irregular, an appearance occasionally present in the young cyst. Fig. 5. A cyst containing fat and nuclei; but in addition to these there is an imperfect worm. Fig. 6. Cyst presenting an imperfect worm. The latter exhibits no indi- cation of organisation, but consists, apparently in great part, of masses of oily substance, in which there is a tendency to the same process as that represented in the fat found in certain other parts. (Plate XIII. Fig, 8). a a, Concentric bodies or cells. Fig. 7. Cyst containing an imperfect worm and large numbers of nuclei. The worm is somewhat irregular in outline, and appears to be made up of an oily-looking material. Around it, occupying the cavity of the cyst, are a number of membranes or fibres, which, most probably, are remnants of the walls of fat cells, Fig. 8 Concentric bodies or cells magnified 670 diameters.