4 Transactions of the Society. 



can give. There is a long wrinkled oesophagus, a great saccate stomach, 

 a distinct intestine, with the cloaca at the very extremity of the lorica : 

 the branchial bands are distinct, but no contractile vesicle. It is not 

 uncommon, with the preceding. (Fig. 10.) 



11. Nothoica sjjinifera. Lorica broadly sub-rhomboidal ; the dorsal 

 plate often less than the ventral, and separated by a wide and deep 

 cleft : at each angle of junction is seated a short spine, so hinged as 

 to be concealed within the cleft, or widely projected, at will. Length 

 of lorica 1/220 to 1/100 in. Marine. 



An interesting and attractive species. The whole interior is often 

 richly coloured, especially the enormous stomach. An ample contractile 

 vesicle is present. The hind outline in some examples is evenly 

 rounded ; in others an iuangulation marks both plates. Ebrenberg's 

 figure of Anur. hiremis may be compared with this; but it differs in 

 important details ; and his text gives no help. I receive this also from 

 the Tay tide-pools. (Fig. 11.) 



12. Nothoica pohjgona. Lorica roundly pear-shaped, truncate in 

 front ; the central pair of the occipital spines stout, the other two pairs 

 almost obsolete : ventral plate forming a square box, with sloping, 

 many-angled sides. Length l/KiO in. Lacustrine. 



A remarkable form. The dorsal plate is a half-oval, the ventral 

 nearly flat. The latter is very peculiar : a kind of sub-cubic box, open 

 at the summit, runs down to about three-fourths' length, and then 

 proceeds, in pyramidal form, to a point at bottom ; and this appears to 

 contain the viscera. Each side is covered-in by a plate of two planes, 

 but appears to be empty. On those parts of the arched dorsal plate 

 which answer to these empty lateral chambers, run down very delicate 

 flutings, while the broad medial part is quite clear and smooth. All 

 the angles are distinct. The only example seen was dead, but showed 

 a crimson eye and a normal mastax. From Kingswood Pool, near 

 Birmingham. (Fig. 12.) 



18. FurcuJaria lopliyra. Body fusiform : head separated by a 

 cou'^triction ; back sharply ridged ; toes broad at base, tapering at 

 mid-length to long-drawn fine points. Length 1/290 to 1/260 in. 

 Lacustrine. 



Somewhat near to F. gracilis, but the above characters, which are 

 constant in a great number of examples, sufficiently distinguish it. The 

 body, sub-cylindric at first, swells more or less behind the middle, where 

 the dorsum rises to a sharp edge, not a carina. The head is large, 

 always distinct, with a brilliant eye at the very front, and a prone ciliate 

 face. The trophi are those of gracilis, very large, often extruded. 

 A thick short foot bears two great toes, often widely expanded, one- 

 fourth of the whole length ; each is a glassy rod, of thick base, which 

 tapers somewhat abruptly near the middle to a long point of great 

 tenuity. (Plate II. fig. 13.) 



14. Callidina pigra. Body fusiform, fluted, not collared ; column 

 having a decurved acute hook ; spurs minute ; viscera rufous. Length 

 (extended as in fig.) 1/90 in. Lacustrine. 



I have seen two examples, both of which had the extremities 

 colourless, but the middle tinged of a delicate sherry-brown, the viscera 



