344 PEOCEEDINGS OF THE AMERICAN ACADEMY. 



toplasm containing an oil-like refractive globule of an orange or amber 

 color. Fructification unknown. 



Living in fresh water. Ireland, Germany, Pennsylvania and New 

 Jersey (Leidy). 



In this provisional arrangement, I have followed Cienkowsky in refer- 

 ring this species to the Labyrinthuleae, although I regard it as improbable 

 whether Dijilophrys Archeri and D. stercorea should be included in the 

 same genus. The aggregations of the vegetating amoebse of D. Ai-cheri 

 seem to be an association of the young in groups, the colonies being 

 formed by successive division of the individuals ; and there is nothing 

 definite known concerning a resting stage. 



Diplophrys stercorea Cienkowsky. 

 Archiv. f. mikr. Anat., Bd. XII. p. 44. PI. VIII. 1876. 



Individuals lens- or spindle-shaped, about 4/a-6/^ long? bearing at both 

 ends several pseudopodia, almost bilaterally symmetrical. In the interior 

 a nucleus, one or two contractile vacuoles and a yellow pigment body. 

 Both the isolated and united individuals of the net-plasmodium finally 

 becoming aggregated to form without change of shape pseudospores borne 

 in sori, which are usually stalked, sometimes sessile. 



On dung of horse, cow and porcupine. Russia ; Cambridge, Mass. ; 

 Intervale, New Hampshire. 



This species has been met with twice in American cultures, and so 

 far as I am aware, with the exception of D. Archeri, is the only repre- 

 sentative of the Labyrinthuleas which has been found in this country. 



A form, which is probably the resting condition of Chlamydomyxa labij- 

 rinthuloides Archer, has been found growing in the cells of sphagnum, 

 at Kittery, Maine, by Professor Thaxter. As Archer and others have 

 pointed out, however, it is very doubtful whether this peculiar organism 

 should be included in the Labyrinthuleae. 



