NOTUMMATAD.E. 29 



DiGLENA EOSA, Gossc (171), (PI. XXXI. fig. 21). 



[SP. CH. Body lengthened , fusiform, annulose, larva-like ; proboscis /ro;;taZ, heak- 

 shaped, tcithin ivhich are two colourless eyes; foot minute; toes small, straight, acute. 



The strong division of the body into annular false joints recalls Taphrocamjia. The 

 head, too, resembles tliat of an insect-larva. The fiontal beak is broadly triangular, 

 like that of I), aquilajwai described, and its sharp point, hooked downward, can be seen 

 from above, through its transparent substance. Two well-defined, perfectly colourless 

 bodies, side by side, are also seen through the base of the beak, apparently eyes without 

 pigment. A ring of close-set cilia surrounds the front, behind the base of the beak. 

 The face is truncate, studded with warty eminences. The body terminates m a distinct, 

 bulbous tail. 



Several examples occurred in conferva-tufts waving in the swift mill-stream in Kings- 

 kerswell. All were of a clear horn-yellow hue, with the long alimentary canal full of 

 opaque food-matter. They were restless and swift ; the jaws often protruded from the 

 face, more generis. The beak was much more acute and better shaped in some, than in 

 others. 



Length, ^4, J to tJj inch. Habitat. Lacustrine. P.H.G.] /'^^''^Zo 4^^ 



DiGLENA suiLLA, Gossc (170), (PL XXXI. fig. 24). 



[SP. CH. Body c[/lindric, or fusiform, massive, often gibbous in the middle ; face 

 broad, sub-prone, tvitli small, tubercular frontal proboscis ; eye large, cervical ; foot 

 thick, short ; toes minute, decurved. 



This thick-bodied, plump, snouted, swine-like creature occurred in a number of ex- 

 amples, among conferva much crowded with groups of diatoms, in sea- water from Inver- 

 gowrie. The body rises into successive swellings, divided by sharp constrictions like that of 

 a full-fed caterpillar, diminishing abruptly to an oblique thick head, with a distinct round 

 pimple in front, in which is a very minute refractive corpuscle, like a glass bead. This, 

 however, is probably not an eye, the true eye being large and conspicuous, near the tip 

 of an ample brain. The front is truncate, but appears semi-prone, from the inclination 

 of the head ; it is ciliated on its whole surface, the cilia surroimding the globose pro- 

 boscis, not covering it. 



The jaws are of the same form as in other Diglena, as permollis ; viewed laterally, 

 they are produced into a long point, which is often deliberately projected and retracted. 

 Young specimens lack the plumpness of adults, especially in the hinder parts. The 

 stomach is of great size, usually gorged with green granular food. The animal, in habit, 

 is very sluggish. 



Length, ^, 5 J inch. Habitat. Invergowrie ; marine. P.H.G.] 



DiGLENA (?) PACHiDA, Gosse (170), (PI. XXXI. fig. 2.3). 



[SP. CH. Body thick, sub-cylindric, very variable in outline ; skin leathery, thrown 

 into strong folds ; eye wanting ; toes two, furcate, long, slender, acute, decurved. 



Several examples of this curious thickset form, more remarkable than attractive, 

 occurred to me last summer, in sea-water from various rock-pools in Torbay. It is un- 

 couth, heavy, and sluggish, apparently illoricate, but inclosed in an integument which 

 seems of leathery stifliiess, making stout, transverse folds, whence the fore and hind parts 

 project at intervals. The head, at extreme protrusion, shows a thread-like frontal pro- 

 boscis, an ample brain, but no eye, and trophi which appear slight and very simple, but 

 need further examination. The toes, long and slender, have that backward direction 

 which is seen in many jD(V//e«(5, yet have a forward curve. The internal organs aie 

 nearlv lost in an indistinguishable granulation. 



