KOTIFKRA. 



UOTIFERA. 



Monotrocha loricata. 



" Tail bifurcato and very 



' - : ' . 



G*n. JcUAydium. 

 aa. Dorsal put of the body 



hairy. 



Gen. Ckoctonotiu. 

 S, Two eye*. 



On. GltnojAora. 



Section IT. Schizolrocha. 

 Ciliary Circle simple, divided in parcels. 



fthimpoda nuda. 

 IstFam. Mryalotrocha. 



A. One eye. 



Gen. Microdon. 



B. Two eyes, which are eflaced 

 with age. 



Gen. Afeyalvtrocha. 



Sckiiopoda loricata. 

 1st Fam. floicularia. 



A. No eyes. The envelope of 

 the body gelatinous. 



a. Rotatory organs bilobate 



or (jiiiidrilobate. 

 Gen. Lacinularia. 

 aa. Rotatory organ multifid. 

 * Kotatory organ quinque- 



fid, mandibles dentate. 

 Gen. Stephanocertu. 

 " Kptotory organ with 6-8 

 divisions, mandibles 

 edentate. 

 Gen. FloKitlaria. 



B. Two eyes, which ore effaced 

 with age. Envelope of the 

 body membranous mid 

 granular. Rotatory organ 

 bilobate or quadrilobate. 



Gen. JUelicerta. 



Section III. Polylrocba, 

 fever-d email Ciliary Circles. 



Polyincha nuda. 

 1st Fam. Jfydatina. 



A. No eyes. 



a. Mandibles dentate. 



Oen. Jfydatina 

 aa. Mandibles edentate. 



Month direct, terminal. 

 Oen. EuteropUtt. 



Month oblique, inferior. 

 Gen. Pleurotrocha. 



B. A single eye. 



ft. Eye frontal, tail bifur- 

 cate. 



Gen. Furcvlaria. 

 bb. Eye dorsal. 



Tail simple, hairy. 

 Oen. Monoctrca. 



Tail bifurcate. 

 T Frontal cilia similar. 



Oen. Notommata. 

 ft Frontal cilia dissimilar. 

 With cilia and styles. 



Oen. SyncJufta. 

 With cilia and hooks. 

 Gen. Scaridium 



C. Two eyes. 



f. Eyes frontal. 



Tail bifurcate. 

 Oen. Diglena. 



Tail simple, front with 



two cirri 

 Gen. Triarthra. 

 cr. Eyes donal. 



Tail simple. 

 Oen. Rattuliu. 



Tail bifurcate. 

 Ota. Dittemma. 



D. Three eyes. 



d. One eye donal, and two 



frontal 



Oen. KofjJiora. 

 dd. Three dorsal eyes. 



Oen. fforopi. 

 . Severnl eye^. 



e. Eyes in a circle on the 



neck. 

 i .,.,./ , 



et. Eye* in two cervical 

 Oen. Tkeonu. 



Polytrocha loricata. 

 1st Fam. J.'urhlauidota. 



A. No eyes. 



a. Cuirass depressed. 



* Tail bifurcate. 

 Gen. Lepaddla. 



aa. Cuirass compressed. 

 ' Tail simple. 

 Gen. JMonura. 

 * Tail bifurcate. 

 Gen. Colunu. 



B. One eye. 



b. Cuirass depressed. 



* Tail simple. 

 Gen. Monottyla. 



Tail bifurcato. 

 Gen. Euclilanl*. 

 bb. Cuirsss swollen of angu 

 lar. 



* Tail hairy and simple. 

 Gen. Mattigocera. 



"* Tail bifurcate or tri fur- 

 cate. 



( No cornicle. 

 Gen. Salpina. 

 H- Corniculated. 

 Gen. />inoc/ian'. 



C. Two eyes (frontal). 



c. Head nude. 

 Oen. Mctopidia. 



ce. Head hooded. 

 Gen. StrpkaHOfu. 



D. Four frotal eyes. 

 Gen. Sjuameiia. 



r . i. 



fi'olommala etntrura. The branchial apparatus (ft, r, n) omitted on the left 

 side. (The letters correspond with those of ng. 2.) 



Zygctrocha, 

 Two small ciliary corona;. 



Zygolrocha nuda. 

 1st Fam. Philodinaa. 



A. No eyes. 



a. Tail bifurcate nnd cor- 

 niculate (a frontal pro- 

 boscis). 



Gen. Callidina. 

 aa. Tail bifurcate, not cor- 

 niculate. 



* Rotatory organs, sup- 

 ported on frontal pedi- 

 cles of great length (no 

 frontal proboscis). 



Gen. Ifydriai. 

 ** Rotatory organs sessile 

 and lateral (no frontal 

 prolongation). 

 Gen. Typklina. 



B. Two eyea. 



o. Eyes frontal. 



Tail bifurcato, and with 

 two pairs of horns (thus 

 becoming six-pointed) ; 

 a frontal proboscis. 



Gen. Rotifer. 



Tail trifid, and with a 

 ningle pair of horns (thus 

 becoming five-pointed) ; 

 a frontal prolxMcis. 

 Oen. Actimunu. 

 Tail bifurcate, and with- 

 out horns; no frontal 

 prolongation. 

 Gen. Monotali,. 

 bb. Eyes dorsal. 



(Tail bifurcate, and with 

 ten pair of cornicles ; a 

 frontal prolongation.) 

 Oen. PModina. 



Zyyotrocha loricata. 

 1st Fam. Brachionaa. 

 A. No eyes. 



Gen. Noteut. 



B. One teU. 



6. No tail. 

 Gen. Anurira. 

 bb. Tail bifurcate, flexible. 

 Gen. Brachumut. 



C. Two eyes (frontal). 



Gen. Ptcrodina. 



