EXPLANATION OF PLATES. 
Tenia plicata, pp. 180, 181, the head and anterior part of the 
body nat. size, after a specimen in the Riyks-Museum, Leyden. 
Echinorhynchus gigas, p. 184; a, nat. size, B, head of the same 
species magnified. After Bremser [cones helminthum. 
Tristoma granulatum, p. 186, magnified two diameters ; froma 
specimen in the Ayks-Museum, Leyden. 
Ascaris leptoptera, p. 190, nat. size. A, head, B, tail, both magni- 
fied ; after Bremser [cones helninthum. 
Figs. 8 and 9, from Enrenperc’s Infusions-thierchen. Fig. 8, Furcu- 
laria gracilis, p. 204; fig. 9, Philodina megalotricha, p. 209 ; 
both highly magnified. 
Prate VI. Rincep Worms, Insects. 
With the exception of fig. 3 C, all the figures are from nature and of the 
fo) 
Fig. 
Fig. 
Fig. 
fo) 
bo 
natural size unless the contrary be expressed. 
Gordius aquaticus, p. 194. 
Planaria torva, p. 223, magnified two diam. B, head with two 
eyes. 
Hirudo medicinalis, p. 226. 8, rings from the middle of the 
body on the ventral surface, magnified two diameters. c, the 
anterior part of the head, from the inferior surface with the 
margin that surrounds the mouth. ‘Three fissures are seen from 
which the jaws proceed. This magnified figure is copied from 
that of Branpt u. Rarzesurec Mediz. Zool. u. Taf. xxvii. 
fig. 10. 
A, Serpula bicornis SAvieny, p. 236. 8B, the anterior part of the 
inferior surface shewing the operculum. 
Hermella, p. 236. A new species from the Cape of Good 
Hope. 
Lycoris, p. 241. The anterior part with proboscis exserted. 
A new species from the Cape of Good Hope. 
-Polyodontes maxillosa, p. 245. a, the anterior portion with the 
proboscis exserted, B, the proboscis on the inferior surface with 
the four jaws. 
Glomeris ovalis, Sphwropeus imsignis Branpt, p. 292. A, the 
animal rolled together. B, the head and anterior rings from the 
side, and ©, from before ; D, antenna; G, first pair of feet; H, two 
rings from the middle of the body with four pairs of feet. 
(p—H magnified), 
