FROM KEW YOEK, NEW JERSEY, AND GEORGIA. 145 



EUGLYPHA ALVEOLATA, Buj. 

 Leidy, pi. 35. fig. 14 (30). 



Under this name Leidy includes a whole group of species, and subsequent 

 American workers have followed his classification and have generally failed 

 to specify which of the various forms illustrated by Leidy they have found. 

 Li gatherings from over 40 counties in the British Isles no spined form of 

 E. alveolata was seen by me, but in the United States a form occurs which is 

 undoubtedly E. alveolata, and is furnished with one or two short scale-spines 

 at or near the apex ; the presence of these scale-spines shows that this species 

 is a member of the group of Euglyplice belonging to Division I. in the table, and 

 is quite distinct from species that bear articulated spines. It may also be 

 pointed out that it is only among the species belonging to Division I. that 

 two rows of denticulated aperture-scales are present. The following is the 

 description of E. alveolata : — 



Test of medium size^ elongate oviform ; not compressed, glabrous. Body- 

 scales circular to broadly OA^al. Aperture circular, bordered, generally, by 

 two rows of finely denticulated scales, 8-12 in each row. Nucleus 10-15 /i 

 diam., with a single nucleole. Pseudopodia few, long, and radiating. 



Dimensions. Length 45-100 /x ; breadth about half the length ; aperture 

 0*4 to 0*5 of the breadth. 



Var. MINOR, Tardneh *. 



Similar to the type but smaller. Length 30-45 /i. 



The body-scales are oval ; it is much less common than the type. 



Var. ciRRATA, var. nov. (PI. 12. figs. 25-27.) 

 E. alveolata pars, Leidy, pi. 35. figs. 5, 9 (30). 



Test as in the type, but the fundus furnished with one or two short scale- 

 spines ; aperture usually bordered by two rows of denticulated scales. 

 Nucleus and pseudopodia normal. 



Length 60-75 /* ; diameter 0*46-0'5 length; aperture 13-14 /* ; spines 

 10-17 yu- in length. 



Distribution. Split Rock Lake, N.J. ; Pennsylvania {Leidy). 



In the United States the breadth of this variety, and also of the type, is 

 generally less than half the length of the test, whereas in Europe it is 

 generally more than equal to half the length. Two pairs of this variety were 

 seen in conjunction, and in both cases the individuals of each pair were 

 similar. 



* Sitzunu-sb. bohm. Ges. der Wiss. 1881, p. 233 (1882). 



