Il8 DAVENPORT ACADEMY OF SCIENCES. 



The chief difference between Podophrya buckei S. K. and Podo- 

 phrya coniprcssa Nutting is in the shape of the body. Sand has 

 found all transitional forms between the cylindrical and greatly 

 compressed body and therefore concludes that Podophrya biickei 

 S. K. and Podophrya compressa Nutting are identical. For the 

 reception of this and closely allied forms he has instituted the 

 genus Hallezia and the species described above is known as Hall- 

 ezia buckei S. K. 



Since the Iowa form described by Nutting was of the com- 

 pressed variety, and the species not having come under my obser- 

 vation, Figs. 216-218, PI. XXX, are reproduced from The Amer- 

 ican Naturalist. Fig. 216 is a view of the broad side of the organ- 

 ism, while Fig. 217 illustrates the form from a lateral view point. 

 Fig. 218 represents the beginning of reproduction, the tentacles 

 being retracted and the internal embryos forming, which are 

 finally extruded. Each embryo becomes a free-swimming organ- 

 ism for a period and then, settling down, attaches itself and rap- 

 idly developes into the adult. 



For a detailed studj^ of the species, its habits and life history, 

 see The American Naturalist, Vol. XXII, p. 13. 



Family, DENDROSOMID.^. 



TRICHOPHRYA C. & L. 



Irregular in shape, ovate or elongate. Tentacles usuall}^ dis- 

 tinctly capitate, scattered or in groups. No supporting stalk or 

 lorica present. 



Trichophrya sinuosa Stokes. 



Body irregular in shape, with marginal lobes. Tentacles long, 

 capitate, extending in clusters from the lobes. Nucleus band- 

 like, with ramifying branches. Contractile vesicles one or more. 



Length of body, 155-200 microns. (Fig. 219, Pi. XXX.) 



This species, first discovered by Dr. Stokes of New Jersey, has 

 been observed in several localities in Iowa, being found in fresh 

 water among algae and other aquatic plants. 



The organism is somewhat amoeba-like, the marginal lobes, of 

 which there may be as many as nine, having in some degree the 

 power of extension and contraction resembling lobose pseudopodia 



