1902] MICROSCOPICAL JOURNAL. 99 
23. PtERaSSA. IL, 4. 
a Pinnz 24, in 6 longitudinal rows; horny-yellow surda 
24. TRIARTHRA. II., 5. Sup. 18. 
a Spines more than twice the body length, imbricated.....longiseta 
a Spines more than twice the body length, not imbri- 
cated; base of unpaired spine postero-terminal.terminalis. Sup 
a Spines not twice the oval body-length ow. oe mystacina 
a Spines not ¥ the cylindrical body-length _0. ow... breviseta 
™ 25. PEDETES. IL., 8. 
Leaping styles twice the body-length occ eee eeeeee saltator 
26. HyDATINA. II., 9. 
Ra EEN RI AS Egg A RARE AD NIAC oC senta 
27. RuHINops. II., 10. 
One species s...... (> ROE ae? et, SMR Ss se vitrea 
28. Notops. II., 11. ! 
a Foot wholly retractile, (b) 
a Foot not wholly retractile, not ventral oo... brachionus 
b Flask-shaped, about 1-270 in, long; foot very 
small; trophi forcipate.... | oo. cecceccs secon minor. Q., 1892, 359 
b Flask-shaped ; foot long, cylindrical; tro- 
an os SiR aR aR pygmeus. J., 1893, 444 
b Sac-shaped, much compressed ; trophi forcipate..........00... hyptopus 
‘b Sac-shaped; trophi malleate can clavulatus 
b Ovate, ventrum flat ;aredspot on each side of mastax.pelagicus* 
b One species from China... ee ccccccceeecee ......lotos. J., 1893, 152 
29. ALBERTIA. II., 15. Sup. 20. 
a Length 1-100 inch; subcylindrical; foot 1-jointed; toe 
ELA A AE OLA IRN Ce ORAS intrusor 
a Length 1-270 in.; toe a soft papilla. In Nais..0 ee. naidis 
a Length 1-55in.; toe none...Intestine of earth- 
RNR MONTE ntsc cnvsnecontnopesenninsenee voc tocs vermicularis. Sup 
30. TAPHROCAMPA. II., 16. Sup. 20, 
a Body cylindric, (b) 
a Body fusiform or tapering, (c) 
b Brain clear; eyes 2; front with decurved hood....nitida. Q., 1898, 75 
b Brain large, long, clavate, with moving granules; 
Peep ramernwerats Tim late is cocneccc ous twcdons clavigera} 
D Bram Onaatie; toes thick, Actte ooo oes ecccscecscoccterosneosen annulosa 
c Brain clear; front with recurved hood; tail present....Saundersiz 
c Brain opaque; eye 1; toes a wide crescent... selenura. Sup 
* Jennings. Bul. U. S. Fish Com., 1899, 82. 
+ Stokes. Ann. & Mag. Nat. Hist., 1896, 18, 
