1887. ] MICROSCOPICAL JOURNAL. 67 
a. Lobes 3, body 34; to 7j inch; corona not dotted . . . . ambigua. 
a. Lobes 5, knobbed (4). 
a. Lobes 5, not knobbed (c). 
@iobes:7, knobbed:))... SNE RR e AGEN NG ETM Nh TERED ANLZ Si, 
6. Lobes linear; sete not site evar HPieehiccdtlint BCOFOMELLA. 
6. Lobes linear ; sete very long, in constant notice EY EERE NEN STLARINY ZIZZO 
@-obes triangular ;' no dorsal process's) G0) )* 2. 2 vornata. 
6. Lobes triangular; with a dorsal process - . . . . « . cornuta. 
6. Lobes very short, knobs almost sessile . . . . . . . . cyclops. 
c. Lobes pointed; peduncle very long . . . . . . Jlongicaudata. 
pam wobesroroad.;peduncle‘short | sis ¢ 20.4 ke Teitrent © campanulata. 
2. ACYCLUS zzguzetus. 
3. APSILUS. 
Pmorentakmarcin crenate orvwrinkled’ 9. %)c 09" 2a 4 lentiformts. 
Paerronialmar ein: smooth 1.5008 26 Lo SN ON Beran 
4. STEPHANOCEROS Eiichhorntv. 
5. MELIcERTA. 
a. Pellets subspherical ; lobes wider than the tube . . . . ringens. 
6. Pellets pointed, cylindric; lobes as wide as the tube . . . condfera. 
c. Pellets ovoid, large; upper lobes deeply separated «(+ fC 
d. Pellets none, be gelatinous ; lobes thrice the body aden . tubicolaria. 
6. LIMNIAS. 
a. Tube membranous, transversely ridged . . . . . . annulatus. 
#.Gube membranous, not rigid . ... 9. +... 8 .. ceratophylic. 
7. CEPHALOSIPHON. 
a. Tube membranous, tapering to the base . . . . . . . “mnias. 
a. Tube gelatinous, irregular, semi-transparent . . . . . candidus. 
[ To be continued. | 
Trichina spiralis. 
By Dr. R. REYBURN, 
OF WASHINGTON, D. C. 
No animal has, at any time, attracted so much attention as the little nema- 
tode worm which lives rolled up in muscle. Let us imagine an extremely 
slender pin, such as entomologists employ to fasten the smallest insects, rolled 
upon itself in a spiral form so as to lodge in a cavity hollowed out in the midst 
of the muscles, in a space not larger than a grain of millet, but large enough 
to be discerned by the naked eye. 
Before entering upon a particular description, we may notice the circum- 
stances which led to their attracting so muchattention. It was in 1832 thata 
demonstrator of anatomy at Guy’s Hospital, in London, Mr. J. Hilton, found 
in the flesh of a man sixty-six years of age, who died of a cancer, a great num- 
ber of little white bodies. These he took for vesicular worms. The scalpel, 
during the dissection of the muscles, met with granulations which blunted its 
edge. Astonished at finding these hard bodies, he removed some of them 
