JOURNAL OF MICROSCOPICAL SCIENCE. 
DESCRIPTION OF PLATE VIII, 
Iilustrating Dr. McIntosh’s paper on the Trematode Larva 
and Ascaris of the Carcinus menas. 
Fig. 
1.—Lateral view of the embryo, showing its coiled condition in the egg. 
« 180 diam. 
2.—Front view of the embryo in the egg. 180 diam. 
3.—Various specimens of the extruded larva in different postures. Mag- 
nified by the high power of a dissecting lens. 
4.—Hge-capsule after rupture. A delicate outer investment is in this case 
seen stretching across the rent. 
5.—The trematode larva, x180 diam. a, Pore at the posterior margin; 
b, ventral sucker; ¢c, large granular bodies; d, one of the circular 
granular masses anterior to the former; ¢, clear globule in front of 
ventral sucker; //, alimentary ceca; g, dilatation of cesophagus 
(pharyngeal bulb?); 4, oral sucker; 4%, groups of large compound 
cells ; mm, excretory (?) tubes. 
6.—Portion of the investing tissue of the larva, showing the spikes. 
x 280 diam. 
7.—The ascaris from liver of Carcinus menas. Magnified by high power 
of dissecting lens. 
8.—The anterior extremity of the foregoing. x80 diam. 
9.—Posterior extremity of the same, x 80 diam. a. The granular rounded 
body most clearly observed. 
