JOUENAL 



OF THE 



ROYAL MICROSCOPICAL SOCIETY. 



DECEMBER 1887. 



TEANSAGTIONS OF THE SOCIETY. 



XIII. — Twenty-four more Neiv Species of Rotifera. 

 By P. H. GossE, F.E.S., Hon. F.E.M.S., &c. 



(Read 12th October, 1887.) 



Plates XIV. and XV. 



Eecent investigations having still further augmented the list of our 

 native Eotifera, I am enabled to present to the Society diagnostic 

 descriptions and delineations of twenty-four new species. 



1. PhUodina mierops. Body very slender, closely resembling 

 Rotifer vulgaris, both in form and manners, but with eyes distinctly 

 pectoral, small, round, of very pale red hue. Column thick, rounded, 

 with minute hooked proboscis at front : spurs rather small, separated by 

 a horizontal edge: corona in action not wider than head. Length 

 1/80 in. Marine. 



This can scarcely be confounded with any recorded PhUodina. For 

 some time I felt sure it was Rotifer vulgaris, and marvelled that I could 



EXPLANATION OF PLATES XIV. and XV. 



Fig. 1. — PhUodina mierops. a, dorsal ; 6, lateral ; c, corona expanded ; d, retracted ; 

 e, antenna. 



Fig. 2. — Notommata Theodora, a, dorsal ; 5, lateral ; c, foot retracted. 



„ 3. — „ Umax, a, dorsal ; b, lateral ; c, brain and eye. 



„ 4. — Proales coryneger. a, dorsal ; b, lateral. 



„ 5. — Furcularia lactistes, a, dorsal; 6, lateral. 



„ 6. — „ molaris. a, dorsal ; 6, lateral. 



„ 7. — „ sphxrica. a, dorsal ; 6, lateral. 



„ 8. — „ sterea. a, dorsal ; b, lateral. 



„ 9. — „ Uva. a, dorsal ; 6, lateral ; c, mastax, from the right. 



„ 10. — Diglena, aquila. a, dorsal ; h, lateral ; c, beak, dorsal ; d, lateral. 



„ 11. — „ Eosa. a, lateral; 6, dorsal. 



„ 12. — Distemma platyceps. a, dorsal ; 6, lateral. 



„ 13. — Mastigocerca lernis. a, lateral ; 6, foot-bulb enlarged. 



„ 14. — Diaschiza fretalis. a, dorsal; 6, tropbi dorsal; c, ib. lateral. 



„ 15. — „ acronota. Lorica, lateral. 



„ 16. — Distyla lipara, dorsal. 



„ 17. — Metopidia pygms&a. a, dorsal ; b, lateral ; c, transverse section. 



„ 18. — Dispinthera capsa. a, dorsal ; 6, lateral. 



„ 19. — Monura Bartonia. a, lateral : 6, ventral. 



„ 20. — „ loncheres. a, lateral ; b, posterior sinus. 



„ 21. — Mytilia poscilops. a, dorsal ; 6, lateral ; c, transverse section. 



„ 22. — „ producta. a, dorsal ; b, lateral. 



„ 23. — Anursea schista. a, dorsal ; b, lateral. 



„ 24. — Nothoka labis. a, dorsal ; 6, lateral. 



1887. 3 L 



