424 Notice of some Aquatic Worms of the Family Naides. (June, 
appears to approximate this one, and which may prove to be the 
same, was described and figured a century and a quarter ago by 
the portrait painter naturalist, Rosel von Rosenhof, as the little 
supple water-serpent with two fork prongs—“ das geschmeidige 
Wasserschlanglein mit zwey Gabelspitzen” (Insecten Belustigung, 
Nürnberg, 1755, Th. 3, 581, Tab. xc, Fig. 8-16): In character 
and habits it so closely accords with the genus Aulophorus of 
Schmarda (Neue wirbellose Thiere, 1861, 11, 9), that I have 
referred it to a species of the same. Schmarda describes two 
species, A. discocephalus of Jamaica, and A. oxycephalus of Ceylon. 
Our species I propose to name Aulophorus vagus. Its charac- 
ters-are as follow: Body compressed cylindrical, transparent, with 
red blood and yellowish-brown intestine. Single individuals of 
the third of an inch or more in length, composed of twenty-four 
to thirty-five rings. Head ovoid, extending asa conical upper lip, 
very mobile and changeable in form, obtuse or sub-acute, and 
minutely hirsute. Eyeless. Caudal ring contracted and furnished 
with a pair of long divergent digit-like appendages, which are 
straight or slightly incurved, blunt and minutely hirsute. Anal 
aperture surrounded by a rosette of half a dozen prominent, 
blunt, conical papilla. The four rings succeeding the head 
furnished on each side with fascicles of seven to nine podal 
stylets ; the succeeding rings, except the last, with fascicles of 
five to six podal stylets, which are shorter than the former. 
Podal stylets sigmoid, with a median shoulder, and end- 
ing in a furcate hook (Fig. 2). The same posterior rings fur- 
nished dorso-laterally with fascicles consisting each of usually a 
single moderately long bristle, and a single, nearly straight stylet, 
ending in a spade-like expansion (see Fig. 4). 
Pharynx capacious, extending into the fifth ring, and narrowing 
into an cesophagus which ends in the intestine within the ninth 
ring. Generative organs unobserved. Worm of three to five 
lines in length, or more, according to its degree of extension. 
Living in a tube of its own construction which it drags about with 
it. The tube is composed of a transparent cement or basis incor- 
porated with various materials, such as vegetal particles, sand, 
dirt, diatoms, spongilla spicules, etc. In creeping about among 
aquatic plants, Lemna and Wolffia, the worm stretches in such a 
manner that one-third of the body extends from the fore part of 
the tube, while the forked caudal extremity remains projected 
