866 Transactions of the Society. 



of three young ladies, the lovely and accomplished daughters of E. W. 

 Beachey, Esq., of Kingskerswell. I have honoured these three species 

 with their names, as an expression of gratitude for the zeal with which 

 they have kept me supplied — themselves skilful microscopists— from the 

 waters within their reach. Each of these three species was discovered in 

 the prolific mill-stream so often mentioned in this article. (Fig. 11.) 



12. Bistemma lolatijeerps. Body suhfusiform; belly flat; head broadly 

 truncate : eyes two colourless globules, remote, occipital : foot rounded ; 

 toes taper, acute, slightly decurved. Length 1/144 in. Marine. 



Though not unlike certain conditions of Diglena suilla and loermoUis, 

 this is distinguished by its two large colourless eyes ; and by the fact 

 that while the trophi are of the usual calUper-ioxm, the mallei are (or 

 seem) attached to the bases, rather than to the ends of the circular rami ; 

 while the fulcrum is nearly as long as the mallei. An inconspicuous 

 hooked proboscis is present, which appears retractile. The broad face is 

 of hyaline delicacy, free from corrugations and marks, as if clear 

 gelatinous flesh, and this well defined from surrounding tissues, in all 

 aspects. 



Young specimens are very restless and mobile, but an adult was of 

 slow movement. Five or six examples occurred to me in water from a 

 tide-pool near Carnoustie, in Forfarshire. In one the jaws were about 

 half extruded from the face, and (as if by paralysis) could not be re- 

 tracted, or even moved : — an accident, the occurrence of which I have 

 observed on repeated occasions, in predatory Eotifera. The species is 

 numerous also in a ditch near Goodrington, South Devon. (Fig. 12.) 



13. Mastigocerca lernis. Body long-oval ; a low dorsal ridge 

 throughout, rising abruptly with an oblique edge in front : toe not so 

 long as lorica ; sub-styles two, unequal, the chief one about one-third as 

 long as the toe, remote from it at the hase. Length 1/80 in. ; of head 

 and body, 1/173; of toe, 1/185. Lacustrine. 



This species has much resemblance to M. scipio ; but the regular form 

 of the lorica, and that of its ridge ; and the origination of the toe and of 

 the main sub-style, on opposite sides of the foot-bulb, so as to be remote 

 from each other, — seem sufficient peculiarities to warrant its distinct- 

 ness. 



Several examples have occurred in Utricularia vulgaris, sent me by 

 Mr. W. K. Hood from a lough in the heart of Ireland. Most of these 

 were dead, mere empty loricae, affording excellent opportunities for precise 

 observation and delineation ; others were alive and active. I subsequently 

 found it in water from Cannock Chase, sent by Mr. Bolton. The dis- 

 tinctive characters noted above were conspicuous in all ; as also in some 

 vigorous examples from Perthshire. In these the extremities of the jaws 

 were occasionally protruded. I detected, moreover, on the front, three 

 tubercles (one central and two lateral), which seemed fleshy, extensile, 

 and retractile. (Fig. 13, plate XV.) 



14. Diaschiza fretalis. Lorica pyriform in outline, viewed dorsally ; 

 gibbous laterally; each plate cut off obliquely behind, and somewhat 

 excavate : belly nearly flat : toes long, blade-shaped, regularly decurved, 

 acute: head furnished with a beak -like projection. Length 1/185 in. 

 Marine. 



