Twenty-four New Species of BoUfera. By P. H. Gosse. 3 



The carinae are thick at their base, and sharp at their edge, so that the 

 furrow is sharp at the bottom, and has sloping sides. (Fig. 5 : d, ideal 

 section.) 



6. Diaschiza (?) cujfha. Much compressed ; dorsum squarely gib- 

 bous : foot short, scarcely protruding ; toes long, blade-shaped, slightly 

 recurved, with claws abruptly shouldered. Length 1/124 in. Lacustrine. 



This hunch-backed form needs fuller examination. I describe it 

 from a single example, just dead, but not decomposed, in water sent 

 from Birmingham. The depth, compared with the width, of the animal 

 is remarkable. The trophi were very long, but ill-defined : in the 

 occiput is a short brain, carrying a flat, lens-shaped red eye on its inner 

 surface. The peculiar shape of the toes is shown at e. I affix a mark 

 of doubt to the generic position, because I could not be quite sure of the 

 dorsal cleft. (Fig. 6.) 



7. Mytilia Teresa, Body truly oval : toes together wider than foot ; 

 each toe large, long, ovate, abruptly produced to a long, slender, acute 

 point. Length 1/200 in. Marine. 



This very pleasing species I have found in some abundance, in water 

 dipped for me out of tide-pools in various parts of Torbay by my little 

 granddaughter, with whose name I honour it. It has a very distinct 

 red eye in the occiput. The large bulbous toes are peculiar, of which 

 one is shown laterally at /. It is a sprightly creature, playing actively 

 among confervoid algse, often pivoting on its toes, like a Cathypna, 

 jerking and bowing : it is less locomotive than M. Tavina. (Fig. 7.) 



8. Pterodina refiexa. Lorica elliptical in outline, the two longi- 

 tudinal halves bent upward and backward, at a considerable angle ; the 

 dorsal surface being evenly furrowed, the ventral rounded. Length of 

 lorica 1/220 in. Lacustrine. 



The angular character is not noticed on a dorsal view, but becomes 

 conspicuous in the act of turning. P. vahata bends its leaves down- 

 ward, on hinges, at will. P. refiexa bends its halves upward, on a 

 medial line which is not hinged, but permanent. It is somewhat like 

 a butterfly, sitting, with half-opened wings, on a flower in an autumn 

 noon. The internal structure is normal. I have found it abundant in 

 water from Smallheath, Birmingham. (Fig. 8.) 



9. Notliolca jugosa. Lorica ovato- rhomboid, highly elevated, broadly 

 truncate before, narrowly behind : ridges and^ furrows strongly marked, 

 ending before they reach the hind margin. Length 1/190 to 1/130 in. 

 Marine. 



This, of all the Notholcse, seems to come the nearest to Ehrenberg's 

 figure of Anursea striata ; of which he says, it is marine at Copenhagen, 

 associating with Pter. clypeata and Brack. Mulleri, species with which 

 jugosa is commonly found in the tide-pools of the Firth of Tay and of 

 the Devon coast. (Fig. 9.) 



10. Notliolca rhomboidea. Lorica rhomboidal, with the lateral angles 

 rounded, the front produced and truncate ; dorsal and ventral plates 

 separated behind by a short cleft. Length 1/16U to 1/145 in. Marine. 



The ridges, in this species, can with difficulty be discerned, especially 

 as the rotating head is habitually protruded, which the creature does 

 not retract for the shock of any tap or shake of the instrument that I 



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