DINOCHARIDA. 75 
follow the arch of the dorsal. I detected four vibratile tags (fig. 4b) on each side: 
one near the top of the lorica one about the middle, and two on a plexus of tubes 
lower down. The muscles that pass down the foot to move it and the toes are very 
conspicuous and are coarsely striated ; and the condyles of the toes (fig. 4c) are remark- 
able. The nervous ganglion (figs. 4, 4d) is so extremely transparent, that in can hardly 
be detected except by a chain of dark spots round its lower edge, which betray its pres- 
ence when it moves. It is very long, cylindrical, with a rounded free end, and lies 
across the mastax and eye (fig. 4d). It may possibly be attached to both. Two rocket- 
headed antenne can be seen, one on each side of the dorsal surface (fig. 4), and about 
one-third of its length from its base. I am indebted to Mr. J. Hood for the numerous 
specimens of this beautiful creature which enabled me to make drawings of it from 
various points of view, and to supplement the details given by Mr. Gosse. 
Length, ;, inch. Habitat. Pools near Blairgowrie (J,H.): very rare. 
Genus STEPHANOPS, Ehrenberg. 
[Lorica cylindrical or pyriform, entire ; head bearing a permanent, wide, circular 
shield; toe (or toes) often surmounted by a toe-like tail. 
The species which constitute this well-marked group are in general easily recognized 
by the beautful glassy shield which protects the head, and which, seen dorsally, in- 
stantly recalls the ring of glory which surrounds the heads of sacred persons in medieval 
pictures. This differs from the frontal hood in the Colwride, by being non-retractile, 
and haying no motion apart from the whole head. Several of the species have spines 
affixed to the lorica or to the foot. The foot is habitually exserted, composed of joints 
which are stout, long, and distinct.—P.H.G.] 
8. LAMELLARIS, Hhrenberg. 
(Pl. XXI. fig. 7.) 
Stephanops lamellaris . ° : Ehrenberg, Die Infus. 1838, p. 478, Taf. lix. fig. 13. 
[SP. CH. Lorica pyriform, having a narrow neck, and slightly prolonged behind 
into three sub-parallel slender acute spines; foot furnished with a toe-like spine. 
The form is swollen and vase-like, with a marked everted rim or neck, within which 
the whole head has a slight motion, surmounted by its lovely round glory-shield, which 
equals the lorica in breadth. Under its shelter is seen the conical front with its rotat- 
ing cilia, its oblique points, and its two ruby eyes, very wide apart. Below the rim or 
neck the trophi are conspicuous, formed on the pattern seen in Huchlanis. The viscera 
are normal, including an ample transversely-ovate contractile vesicle. The hind part 
of the lorica is deeply truncate, and the three spines are limited to the dorsal end. The 
foot consists of three joints, long, and strongly marked, of which the last (save the toes) 
carries a very slender spine seated on a tubercle on its dorsal side, not quite so long ag 
the two toes. The foot joints are permeated with two long chain-like glands.—P.H.G.] 
Length, ;1, inch. Habitat. A garden tub (P.H.G.): rather scarce. 
8. muticus, Hhrenberg. 
(Pl. XXI. fig. 6.) 
Stephanops muticus . . 5 Ehrenberg, Die Infus. 1838, p. 479, Taf. lix. fig. 14. 
[SP. CH. Lorica cylindric, having a distinct thick neck, and prolonged behind into 
a spoon-like shield, which is unarmed, as is also the foot. 
What I identify with Ehrenberg’s muticus agrees better with his description and 
figures than with Eckstein’s. Can the latter have made his drawing from two indivi- 
