VERMES. 91 
d.—More than one of the Vermiculi have occurred with four distinct 
eyes in definite position and arrangement. 
VERMICULUS COLUBER—Serpent-headed Worm.—Plate X. figs. 22, 23. 
« 
So many worms resemble serpents in miniature, that to find distinc- 
tive corresponding names, expressive of their figures, would be a pre- 
carious attempt. 
1. Length, an inch and a half; breadth, a line. Body flattened ; 
anterior extremity obtuse, posterior tapering toa point. Head enlarging 
from the narrower neck, with a dark quadrangular spot on the surface, 
towards the front, a small black eye being at each angle. Body univer- 
sally cream colour. Motion smocth and gliding. Marine and littoral. 
Pate X. 
Fig. 22. Vermiculus coluber. 
23. Head, enlarged. 
2. A variety, or distinct species, of small dimensions, occurs also asa 
littoral marine animal. This extends above two lines, by less than the 
third of a line in breadth, and israther of a ruddy colour. Figure flatten- 
ed ; eyes large, black, and distinct, and set in the same arrangement as the 
former. The enlargement of the head is less definite. Motion gliding. 
PLATE X. 
Fic. 24. Vermiculus coluber 2 
e,—VERMICULUS VARIEGATUS— Variegated Worm.—Plate X. figs. 25, 26. 
Length, eight lines ; thickness, about the fifteenth part of its length ; 
form, cylindrical ; extremities rather obtuse. Towards the front of the 
upper surface are four black eyes, set in long quadrangular arrangement ; 
the two posterior are difficult to be seen. Colour universally variegated 
red and white, with a white line down the back. 
