6 SMITHSONIAN MISCELLANEOUS COLLECTIONS VOL. 85 



CANADIA DUBIA Walcott 



Plate 7, fig. 2; plate 8, figs. 1-2; plate 9, fig. 8 

 Canadia dnbia Walcott, 191 1, Smithsonian Misc. Coll., vol. 57, p. 119. 



Original description. — " This species is proposed to include a small 

 chaetiferous annelid not over 10 mm. in length. One specimen shows 

 a bundle of very fine setae on each side near the head." 



Four of the original specimens are illustrated. 



Cotypcs.—V. S. N. M., Nos. 83936a-d. 



CANADIA SIMPLEX, new species 

 Plate 9, fig. 9 



A tiny organism that appears as a slender tuhe with a termination surrounded 

 by a ring of setae constitutes the material to which Doctor Walcott attached 

 this name. 



Holotype.—U. S. N. M., No. 83937. 



WIWAXIA Walcott 191 1 



WIWAXIA CORRUGATA (Matthew) 



Plate 3, fig. I 



Orthotheca corrugata Matthew, 1899, Trans. Roy. Soc. Canada, 2d ser., vol. 5, 



sec. 4, p. 42, pi. I, fig. 3. 

 Orthotheca corrugata Walcott, 1908, Canadian Alpine Journ., vol. i, no. 2, 



p. 246, pi. I, fig. II. 

 Wiwaxia corrugata Walcott, 191 1, Smithsonian Misc. Coll., vol. 57, no. 5, 



p. 123, pi. 21, figs. 1-4. 



A particularly fine example of this remarkable spined worm turned up in 

 some of the more recent collections. Its picture is included since it may repre- 

 sent a relatively undistorted specimen with most of the plates retained. 



Plesiolype.—V. S. N. M., No. 83938. 



OTTOIA Walcott 191 1 

 OTTOIA MINOR Walcott 



Plate 9, figs. 1-7 



Ottoia minor Walcott, 191 1, Smithsonian Misc. Coll., vol. 57, p. 129, pi. 22, 

 figs. 5-6. 



Original description. — " This species differs from 0. prolifica in 

 its proportionally more slender form when elongated and straighter 

 outline both when elongated and contracted. 'Jlie hooks are also much 



