208 MR. G. H. WATLES ON FRESHWATER 



form 0^ Assulina muscoriim devoid of the membrane bordering the aperture ; 

 the plasma, nucleus, and pseudopodia are also similar ; it is widely distributed 

 but not very numerous, and seems always to occur in association with 

 A. mxiscorum. 



Length 42-52 /* ; breadth 23-30 fju. 



Distrihvtion. — West Point, N.Y. ; South America ; Java ; Great Britain. 



EuGLYPHA FILIFERA var. PYRiFORMis, var. nov. (PL 15. fig. 6.) 



K ciliata pars, Leidy (6), p. 214, pi. 36. fig. 11. 



E.filifera, form "c," Wailes (16), p. 148. 



Test usually smaller than the type, pyriform with elongated neckj the 

 lateral margins furnished with 5-7 long spines arranged in a single row ; 

 transverse section elliptical ; aperture circular bordered by 8 denticulated 

 scales ; plasma and pseudopodia as in the type. 



Length 48-60//,; breadth 24-30 /a ; aperture 6-10 yu, ; thickness 17- 

 23 /i ; spines 18-26 /a in length. 



Distribution. — Good Ground, Long Island ; Pennsylvania {Leidy). 



This variety is referred to as form c on p. 148, Journ. Linn. Soc, Zool. 

 vol. xxxii. (1912), but specimens submitted to Dr. Penard were declared by 

 him not to be E.filifera, Penard. 



The tests of this variety are usually somewhat more compressed than in the 

 tvpe, the thickness varying from two-thirds to three-quarters of the breadth. 

 It is not of common occurrence. 



EuGLYPHA STRIGOSA var. MUSCORUM, Wcules (17), p. 42. 



Forma heterospina, f. nov. 



This form was recorded with the test thickly covered with spines of various 

 lengths. 



Length 65-70//, ; breadth 55-58 /«,; aperture 16-17 /i; spines 6-26 /t in 

 length. 



Distribution. — Palisades, N.J. 



AssuLiNA SEMiNULUM var. SCANDINAVICA, Penard (8), p. 519. 



A. scandinavica, Penard in Mem. Soc. Geneve, xxxi. (1890) no. 2, p. 176, pi. 9. figs. 1-1.3. 



(July one or two individuals were seen and these very small; it is usually 

 found in elevated situations. 



Length 77/t; breadth 73/i; aperture 24 /ia : nucleus 22 /x in diameter, 

 containing nucleoles 6 x4/t ; scales 10 /t in length. 



Distrihution. — Palisades, N.J. 



Trinema enchelys var. galeata, Penard in Mem. Soc. Geneve, xxxi. (1890) 

 no. 2, p. 186. 



This variety, approaching T. complanatmn in appearance, is widely dis- 

 tributed and was occasionally seen in an active state. 



Distrihution. — Yan Cortlandt Park, AYest Point, Long Island, N.Y. ; 

 Palisades, N.J.!; 



