LIST OF ILLUSTRATIONS. 



TEXT FKUKKS. 



Page 



Head of AnjiireMlila 5 



\'enation of ArgyrestJiiafreiiel/a .... 5 



Venation of ArgijreMJi >a r/ecxhirtelhi 



Pontoporcia hoyi L'7 



Eucrangonyx nnicronatus. First antenna; second antenna; iinathopod; telson; 



uropod, from a female; other figures from a male 80 



Eucrangonyx gracilis, Ann Arbor, Michigan. Maxilliped; second gnatliopod 



of a small female; second gnathopod of a large female :')2 



Eucrangonyx Infurcvx, male. jNIacon, Mississippi ,")4 



Eucrangonyx packardii. Terminal portion of the abdomen with the uropoda. . 06 



Xiphargus antmnatus, female. Nickajack Cave, Shellmound, Tennessee '.'>7 



Gammarufi ranuHus, male. Point Arena, California. Mandible; dorsal side of 



the last segments of the abdomen ?>9 



Cammarus fasciatus. First and second gnathojwds of a female; mandible and 



maxilliped; dorsal side of the terminal f)art of the abdomen 41 



Gammarus limnicus. Ann Arbor, Michigan 43 



Gammarus purpurascens, male. Nickajack Cave. Dorsal side of the terminal 



segments of the abdomen 45 



Gammarus propinquus, male. Mammoth Cave, Kentucky 47 



Gammarus csecus, male. Modesta Cave, near Cauas, Cuba 48 



Crangonyx vdre :s, male. ]Mammoth Cave, Kentucky 50 



Stygonectcs flagellatus. Male. San Marcos, Texas 52 



Hyalella hiickerbockcri. .\nn Arbor, Michigan. First and second gnathopods 



of the female; second gnathopod of a young male; second gnathopod of a 



mature male 55 



^fyzoslollla cubamm. Dorsal view ; ventral \ iew 63 



Myzosloma erermanni. \'entral view 64 



Cypsilurus callforincus. ( Adult) 67 



Cypsilurus californicus. (Young) 68 



Geruio macropterus 69 



Lepidopus xantusi 70 



Tetrapturus m itsukurii 71 



Slarksia holderi 73 



Ch.rnopsis alepidula 75 



Antennarius aralonis 76 



Enstatite chondrule out of Hendersonville meteorite SO 



Planor^bis ( Gryaubis) miudanensis 83 



Planorbis ( Helicorbis ) luearm^i 84 



Pseudupeueus rnoami 89 



Pseudupenevs ischyrus 91 



Upeneus bensasi 98 



