JOUENAL 



OF THE 



EOTAL MIOROSCOPIOAL SOCIETY. 



JUNE 1887. 



TEANSACTIONS OF THE SOCIETY. 



VIII. — Twelve New Species of Bottfera. 

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



(Read 13th April, 1887.) 

 Plate VIII. 



I BEG to add diagnoses and figures of a few more Eotifera, supplementary 

 to those described in this Journal, ante, p. 1. 



1. Cathypna angulata. Generally, like C. luna, but occipital edge 

 of lorica nearly straight ; pectoral edge indented in the middle : toe rod- 

 shaped, straight, very slender ; claw one-shouldered, one-third of toe's 

 length. Length, total, 1/85 in. Lacustrine. 



This is more than twice as large as G. luna. Moreover, the frontal 

 edges of the lorica are nearly straight, between very slight lateral points, 

 and alike, save that the line of the pectoral edge (fig. 1, h) descends 

 from each point to a medial angle, just perceptible. Then, the hind 

 extremity of the dorsal plate allows the partial emission of a great pro- 

 tuberant shelly boss, as in Monostyla hulla, behind and beneath which is 

 the globose foot-bulb. Again, the rod-like toes are even straighter and 

 slenderer than in luna, and the claws are much longer in proportion. 

 Parallel-edged to two-thirds of their length, a right-angled shoulder, 

 on the outer side, reduces the width by one-half ; and the remainder (the 

 claw) tapers to a long-drawn acute point (e). When rotating, the trun- 

 cate front is three-lobed, much as in luna; but there is seen beyond 

 and above this a very subtile clear glassy hood, having a rondo-conic 

 outline, protrusile and retractile. 



EXPLANATION OF PLATE VIII. 



Fig. 1. — Cathypna ungulata; hind end of lorica. a, occipital edge ; 6, pectoral edge ; 

 toes. 

 Fig. 2. — Cathypna diomis ; foot and toes, dorsal ; d, toes, seen from the left. 



„ 3. — Cathypna latifrons; dorsal. 



» 4. — Diaschiza globata ; e, dorsal ; /, lateral. 



„ 5. — Monostyla mollis ; dorsal ; g, contracted. 



„ 6. — Dapidia stroma, lorica; h, transverse section; i, ventral; j, lateral. 



» 7. — Colurus leptus ; lateral ; k, ventral outline. 



>5 ?• — Diglena (?) pachida ; I, dorsal; m, lateral. 



„ 9. — Diglena suilla ; lateral ; n, jaws protruded ; o, jaws, lateral ; p, jaws, dorsal. 



5» 10. — Notommata potamis ; dorsal ; q, transverse section of back, 



)» 11. — Proales othodon ; r, dorsal; s, lateral. 



V 12. — Proales prehensor ; f, dorsal; tt, lateral. 



1887. 2 B 



