1902] MICROSCOPICAL JOURNAL 109 
He He ne ot pe BOR OR Hh 
ReRRARMrMHeTOTO*eAAaMAoovosrTrP es > PDD a be ob 
coe p 
Dorsal aspect do.; rear spines acute, sinus, wide, deep......deflexus 
Toe not formed of 2 appressed plates, (h) 
Toe a plate within a wider plate, long, slendert................ coelopinus 
Hind lorica-ends not pointed, (j) 
Hind lorica-ends 2 short, acute points, (i) 
Hind lorica-ends 2 square points ; foot stout, toes minute....pedatus 
Dorsally broad oval; toes 2, stout........ dumnonius, Sup 
Dors’ly long oval; toe single, with foot % lorica-length.leptus.Sup 
Toes 2, (k) 
Toe 1, long, with foot, % sara Sets cleft widening 
SY, Ws RE pe ae Oe Sees PRR GP Pea amblytelus. Sup 
Toes long, slender ; tail 2 minute hooks... decentrus. Sup 
Toes long, slender ; tail none; lorica compressed....grallator. Sup 
Toes large, thick, curved ; foot short, wide..........0.00000..... dactylotus 
54. Meroprpia. II., 106. Sup. 46. 
Lorica sub-circular, (a) 
Lorica oval or ovate, (b) 
Lorica oblong, prismatic, with dorsal crest................ salpina. Sup 
Lorica elliptical ; toes long; eyes 4.000).20.. oblonga. Sup 
Wert epeea, 2 eM CT al WINES. h i, triptera 
Without wings; dorsal margin milled... solidus 
Lorica more or less punctate, or tesselated, (c) 
Lorica smooth, (d) 
Tesselate ; dorsalridge thin, ventral % lorica-length... oxysternum 
Punctate collar present; 2 frontal spines....2....0 0. collaris* 
Punctate collar present ; 2 frontal points... Seat similis* 
Lorica hind end pointed, (e) 
Lorica hind end truncate, (f) 
Lorica hind end rounded or excised, (g) 
Point obtuse ; lorica rhomboid-ovate, dorsum roof-like. rhomboides 
Point acute; front re 2 spines da acuminata 
i Stn ADP TONE HE YN ALI bractea 
Dorsum and ventrum equal; margin not excised........ ovalis. Sup 
Beem VEMIram Umegiialy ee cc ici il keep) coeues lepadella 
Rounded ; edges overhanging ; toe single (7)............ pygmea. Sup 
Rounded ; edges overhanging ; toes 2, flexible....parvula. Q.,’93,284 
Rounded; 2 curved frontal spines 00 ee cornuta, Sup 
Excised at both ends; lorica-front broad........... emarginata, Sup 
55. Monura. II., 109. Sup. 48. 
Eyes 2, approximate ; lorica rounded behind. Marine........ colurus 
Eyes 2, distant; lorica acute behind. Marine.,..........., dulcis. Sup 
Kye 1, cervical; toe very long, slender. Marine...loncheres, Sup 
Eye 1, frontal; toe shouldered, more than % lorica- 
memes AQUATIC 8) ie tik hice bartonia. Sup 
* Stokes. Ann. & Mag. Nat. Hist. 1896, 19. 
