84 
IOWA ACADEMY OF SCIENCES. 
TABLE II. SEXUAL CONDITION. 
Quadrula multiplicata.- 
Quadrula tuberculata. .. 
Quadrula metanevra 
Quadrula lachrymosa. _ - 
Quadrula asperrima 
Quadrula pustulata 
Quadrula pustulosa 
Quadrula plicata. 
Quadrula trigona 
Quadrula rubiginosa 
Quadrula ebena. 
Unio gibbosus 
Unio complanatus 
Alasmodonta confragosa 
Alasmod’nta complanata 
Alasmodonta rugosa.... 
Alasmodonta marginata 
Alasmodonta undulata.. 
Alasmodonta tappaniana 
Strophitus edentiilus 
Anodonta imbecilis 
Anodonta suborbiculata. 
Anodonta grandis 
Anodonta corpulenta 
Obliquaria reflexa.. 
Plagiola securis 
Plagiola elegans. . - 
Plagiola donaciformis. 
Lampsilis parvus 
Lampsilis ellipsis.. 
Lampsilis ligamentinus. 
Lampsilis luteolus 
Lampsilis nasutus 
Lampsilis anodontoides, 
Lampsilis rectus 
Lampsilis ochraceus 
Lampsilis ventricosus.. 
Lampsilis alatus 
Lampsilis laevissimus. . 
Lampsilis gracilis 
Sperm 
Ripe in 
July 
May 
July 
luly 
July 
\ May. J uly 
} Oct. 
July 
J»iy 
May, J uly. 
July 
July 
July, Aug. 
Aug ... 
May, July. 
July 
May 
May, July. 
July 
luly, Aug. 
July 
Aug 
July 
July 
May- July. 
July 
J uly-Aug . 
May-July. 
Ova Ripe in 
May 
July 
\ u \y 
July 
July 
July 
July 
May 
July 
July 
July, Aug. 
July 
July 
May, July. 
May 
May, July 
May, July 
July, Aug. 
July 
July 
May, July. 
Gills 
Filling in 
July 
July 
M ay 
July, Aug. 
July, Aug. 
Aug 
Aug 
July 
Aug 
July 
July 
July 
May, July. 
May, July. 
May, July. 
Aug 
Julv, Aug. 
Aug 
July - 
Aug 
May, J uly. 
May, July. 
Portion of Gills Occu- 
pied by Marsupium 
Whole, all four 
Whole, all four..... 
Whole, all four 
Whole, all four 
Whole outer pair 
Whole outer pair 
Whole outer pair .. 
Whole outer pair .. 
Whole outer pair .. 
Whole outer pair .. 
Whole outer pair .. 
Whole outer pair .. 
Whole outer pair __ 
Whole outer pair 
Whole outer pair . . 
Post. part, outer pair 
Post. 
Post. 
Post. 
Post. 
Post. 
Post. 
Post. 
Post. 
Post. 
Post. 
Post. 
Post. 
part, outer pair 
part, outer pair 
part, outer pair 
part, outer pair 
part, outer pair 
part, outerpair 
part, outer pair 
part, outerpair 
part, outerpair 
part, outer pair 
part, outerpair 
part, outerpair 
Post. part, outer pair Q c t. 
Old 
Glochidia 
Found in 
Nov. , May 
Nov. 
Sept. 
Sept. 
^ Oct. Nov. 
? May 
Oct. 
Oct. , Nov. 
May 
Nov. 
Oct. 
Nov. 
Oct., May 
j Oct. ,Nov. 
) M ay 
Oct. , Nov. 
Nov. , May 
