108 



Tr ansae tions . — Zoo logy . 



described from New Zealand {vide Trans. N.Z. Inst., vol. xii., 

 p. 301, and vol. xxv., p. 193), and my specimens include 

 representatives of the Ploima and Bdelloida, so that only 

 Scirtopoda remain to be discovered. This system of classifica- 

 tion will be found fully described in Hudson and Gosse's 

 " Eotifera," as well as (in its crude form) in the Journal M. 

 Sci., xxiv., 835. 



The fpllowing is Hudson's latest classification, reduced to 

 tabular form : — 



Order. 



Characteristics. 



Family. 



Characteristics. 



Rhizota 



Bdelloida 



Ploima 



Sub-order 

 Il-loricata 



Fixed when 

 adult. Foot 

 wrinkled, non- 

 retractile, non- 

 furcate, and 

 with a suck- 

 ing-disc 



Swim with ci- 

 liary wreath, 

 and creep like 

 a leech. Foot 

 wholly retrac- 

 tile within the 

 body, telesco- 

 pic, furcate 



Swimming with 

 their ciliary 

 wreath, and 

 in some cases 

 creeping with 

 toes 



Integument flex- 

 ible; no stif- 

 fened shell. 

 Foot absent, 

 furcate (usu- 

 ally), not 

 wrinkled ; fee- 

 bly tele.scopic, 

 and partially 

 retractile 



Floscularidse 



Melicertidse 



Phillodinidse 



Adinetadse 



Micrococidse 



Asplanchni- 

 d£e 



Synohactadse 



Corona produced longitudin- 

 ally into setigerous lobes; 

 buccal orifice central ; ciliary 

 wreath a single half-circle 

 above ' the buccal orifice. 

 Trophi uncinate. 



Corona no setigerous lobes ; 

 buccal orifice lateral ; ciliary 

 wreath a marginal continu- 

 ous curve, bent, and en- 

 circling corona twice ; only 

 one gap. Trophi malleo- 

 ramate. 



Corona two transverse circu- 

 lar lobes ; ciliarj' wreath 

 marginal continuous curve 

 encircling corona twice ; two 

 gaps. Trophi ramate. 



Corona flat prone surface ; 

 ciliary wreath, furred ventral 

 surface of corona. Trophi 

 ramate ; frontal column sol- 

 dered to dorsal surface, and 

 ending in two hooks. 



Corona obliquely transverse, 

 flat, circular ; buccal orifice 

 central ; ciliary wreath a 

 marginal continuous curve, 

 and two curves of larger cilia 

 one on each side of buccal 

 orifice. Trophi forcipate. 

 Foot stylate. 



Corona subconical, with one 

 or two apices ; ciliary wreath 

 single, edging corona; intes- 

 tine and cloaca absent. 



Corona a transverse spheroidal 

 segment, sometimes much 

 flattened, with styligerous 

 prominences; ciliarj' wreath 

 a continuous or mterrupted 

 marginal curve encircling 

 corona ; mastax very large, 

 pear-shaped. Trophi forci- 

 pate. Foot minute, furcate. 



