Introduction to Animal Morphology. 69 



may be, as Agassiz supposes, early stages of Trematode 

 worms. 



2. Peridinieea mouthless (mouth-bearing, Schmarda\ free, 

 loricated forms, with a transverse ciliated furrow, no con- 

 tractile vesicle, but with a nucleus, vacuoles and chlorophyll 

 granules. Some have a red pigment spot (Glenodinium) ; 

 others have two or three long, curved, horn-like processes 

 ium). The lorica is often double, chitinous (or siliceous?). 

 Many are marine, and vividly phosphorescent ; they multiply 

 by longitudinal or transverse fission, and have been seen full 

 Itules (Pcr/r). 7?ij//<T regards some of these as Annelicl- 

 larv.e. They unite Flagellata and Infusoria. 



Vcinetina stalked, membrane-clad forms with radiant, 

 ile, tubular processes, whereby nourishment is sucked 

 nee called Suctoria by Clapartdt, and Polystoma by 

 :. The stalk is an extension of the cuticle, and is 

 3 striated. The processes may be branched (Den- 

 metes),* or in bundles, especially when the body is 

 netimes only one suctorial arm may exist (Rhyncheta, 

 tic on Cyclops). The endosarc contains granules, and a 

 nucleus with apparently an investing membrane. The 

 ctosarc includes one or more contractile vesicles. I>y the 

 which the animal applies to its host, currents of food 

 granules enter and coalesce within into food globules. They 

 multiply by gemmation, rarely by fission. We know little of 

 their \ . Some are, perhaps, as.S'A/// supposes, larval, 



but this is denied bv CLiJmridc and LdcJuihuui. Kbcrhanl saw 

 one form becoming ciliated and changing into Hursaria 

 tella. Ophiyodendron 19 commensal with IMumularia, 

 and h .. 3 of xooids, proboscidean and lageniform, 



both :lks. 



!udes the mouth-bearing forms, ami con- 

 :r sub-orders: i. Peritricha, with a ciliated peri- 

 . including live families : i. Vorticellida.* (Fig. S. 



:i-slia].cd forms, with mouth and amis opening inside 



abort and the bell be 

 . or it may be rigid, branched or un- 



'I be Uu 



