LORICATA. 309 



Fam. 5. Microcodidae. Corona obliquely transverse, flat, circular ; buccal 

 orifice central ; velum a marginal continuous band encircling the corona and 

 two curves of larger cilia, one on each side of the mouth ; trophi forcipate ; foot 

 stylate. Microcodon Ehrh. 



Fam. 6. Asplanchnidae. Corona sub-conical with one or two apices ; velum 

 single, edging the corona ; with large stomach which ends blindly, intestine 

 and cloaca being absent. Asplanchna Gosse ; Saccnlus Gosse. 



Fam. 7. Synchaetidae. Corona a transverse spheroidal segment, sometimes 

 much flattened, with styligerous prominences ; velum a single interrupted or 

 continuous marginal band ; mastax large, piriform ; trophi forcipate ; foot 

 minute, furcate. Synckaeta. 



Fam. 8. Triarthridae. Body furnished with skipping appendages ; corona 

 transverse ; velum single, marginal ; foot absent. Polyarthra Ehrb. ; Pteroessa 

 Gosse; Triarthra Ehrb.; Pedctcs Gosse. 



Fam. 9. Hydatinidae. Corona truncate with styligerous prominences ; 

 velum two parallel bands, the one marginal fringing the corona and mouth, 

 the other lying within the first, the styligerous prominences being between the 

 two ; trophi malleate ; foot furcate. Both rings are continued into the mouth. 

 Hydatina Ehrb., eye absent, H. senla 0. F. M. (Fig. 244) ; PJiinops Hudson, 

 eyes two ; Notops Hudson, eye single. In Hydatina senta there is a small 

 styliferous pit on the dorsal surface with a strong nerve from the ganglion. 



Fam. 10. Notommatidae. Corona obliquely transverse ; velum of interrupted 

 curves and clusters, visually with a marginal band surrounding the mouth ; 

 trophi forcipate ; foot furcate. Albertia Duj., vermiform, entozoically parasitic 

 in Annelida; Taphrocampa Gosse, Plcurotrocha Ehrb., without eyes; Notmn- 

 mata Gosse, not annulose, cylindrical, with projecting tail ; auricles on head ; 

 brain contains opaque chalk masses, trophi virgate ; Copcus Gosse ; Proales 

 Gosse ; Furcularia Ehrb. ; Eosphora Ehrb. ; Diglena Ehrb. ; Distcmma Ehrb. 



Sub-order 2. LORICATA. 



With a stiffened, wholly or partially enclosing shell ; foot various. 



Fam. 11. Rattulidae. Body cyliudric or fusiform, smooth without plicae or 

 angles ; contained in a lorica closed all round, but open at each end, often 

 ridged ; trophi long asymmetric ; eye single, cervical. Generally subject to 

 abnormal conditions. With tendency to asymmetry, in mastax, antennae, toes. 

 Masligoccrca Ehrb., toe as single style with accessory stylets; Rattulus Ehrb., 

 toes two ; Coelopus Gosse, body curved, toes one broad plate with another laid 

 upon it in a different plane. 



Fam. 12. Dinocharidae. Lorica entire, vase-shaped or depressed ; sometimes 

 facetted, often spinous ; foot and toes often greatly developed ; trophi sym- 

 metrical. Dinocharis Ehrb. , foot and toes long, foot with spurs ; Scandium 

 Ehrb., foot without spurs, toes long; Stephanops Ehrb., head with a wide 

 circular shield. 



Fam. 13. Salpinidae. Body more or less completely enclosed in a firm 

 lorica which is open at each end and divided down the back by a fissure whose 

 sides are united by membrane ; two furcate toes always exposed. Diaschiza 

 Gosse, Diplax Gosse, Salpina Ehrb., lorica with spines, trophi sub-malleate, 

 eye single, cervical ; Diplois Gosse. 



Fam. 14. Euchlanidae. Lorica of two dissimilar plates, one dorsal and 

 one ventral, united so as to form two confluent cavities of which the upper 



