1887. ] MICROSCOPICAL JOURNAL. 65 
* With 2 hooks enclosing the dorsal antenne  . . Cephalostphon, 7. 
Fevwithout dorsalhooks:; ina tube or not’. +) 2 272%) Giczstes, & 
** Lobes 2, not setigerous ; tube membranous DL ete Vaca. 6. 
** Lobes 2-7, short, setigerous; sete long, radiating . /Voscularia, 1. 
** Lobes 4, not setigerous; inhabiting atube . . . . . Melicerta, 5. 
** Lobes 5, long, slender, erect, convergent . . . Stephanoceros, 4. 
#* 
SESE HH Bp BRO O SERS BTA 
Lobe single, frontal, arched; sete none; foot truncate .  Acyclus, 2. 
Corona 2, circular, transverse lobes (a). 
Corona a flat, ventral, ciliated surface (6). 
.. yes 2, Scale : ; SE eh PRE ae NERO LD, 2. 
. Eyes 2, within the fon pecan By AEE ae COLE a7.) eae 
Eyes 2. frontal; body excessively long ad leaden a  Actanurus, 15: 
Eyes Scent. body slender, pointed, corrugated . . Callidina, 16. 
Eyes absent; body longitudinally corrugated . . . . Adzneta, 17. 
. Il-loricate ; foot, when present, not transver sely wrinkled (d). 
. Loricate wholly or partially ; foot various (7). 
Body with skipping appendages (e). 
Body without skipping appendages (/). 
Spines in clusters on the shoulders . . . . . . Polyarthra, 22. 
Spines single, 2 lateral,1 ventral . . . . . . . WYrtarthra, 24. 
Peepimess(styles) 2,on the breast. .. .. . ..) ; (» so \Pedetes,/2y: 
Corona with styligerous prominences (g.) 
Corona without styligerous prominences (2). 
Front with 2 ciliated auricles; mastax large, pyriform, Syzcheta, 21. 
Front without ciliated auricles ; corona truncate (/). 
Corona with a dorsal proboscis; eyes 2, on the proboscis, /’Azzo0ps, 27. 
Corona without proboscis; body conical; eyes none . Hydatzna, 26. 
Corona without proboscis ; body not conical; foot retractile; eye 1, 
Votops, 28. 
z. Corona oblique, transverse, flat, circular; foot stylate, MWécrocodon, 18. 
z. Corona oblique, transverse ; foot furcate (4). 
z. Corona subconical, with 2 apices . . . . . . Asplanchna, 19. 
z. Corona subconical, with 1 apex ‘ : SiSacculus. 26: 
k. Body vermiform, lengthened, foot eivall. tde nl it Endoparasitic, 
Albertia, 29. 
k. Body more or less cylindrical (2). 
7. Annulose; toes 2; cilia very limited or none . . Zaphrocampa, 30. 
Z. Not annulose ; often soft and versatile (7). 
m. With sense-organs in the lumbar region . . . . . . Copeus, 33. 
m. Without sense organs in the lumbar region (7). 
m. Foot with telescopi¢ joints; eyes3. =. . =. «~~. Hosphora, 36. 
z. Foot without telescopic joints (0). 
8 8 
So SSS 
. Brain conspicuous, usually opaque; eyes present . Notommata, 32. 
. Brain conspicuous, eyes absent; mallei 1-toothed, Plewrotrocha, 31. 
. Brain conspicuous, 3-lobed ; eye single; tail a minute tubercle, 
Copeus, 33. 
. Brain not especially conspicuous, clear (f). 
Body with a tendency to lumbar enlargement (9). 
. Body without tendency to lumbar enlargement ; ciliated face more or 
lesanpuonc mmm)... Se Renmei tls | an (eeKOMLES, ae 
Proboscis fleshy . . . ")  Distenw7a,, 20: 
Proboscis often hooked ; toes usually long, sharp . ot 185 LOGSTCMO ee fe 
Proboscis not hooked ; toes usually long, conspicuous, Lurcularéa, 35. 
Foot wanting, lorica Heatle- like; smoothtveameemetay 1-1 Pompholys, 59. 
Foot wanting; lorica beset with pinnate styles a, Pteressa, 23. 
