1901.] NATURAL SCIEN'CES OF PHILADELPHIA. 117 



smootliish, showing scattered punctures and under a lens a very 

 fine punctulation ; on both sides of the hand a row of three or four 

 small pointed tubercles runs lengthwise along the median con- 

 vexity; lower edge bluntly biangular. Fixed finger nearly double 

 the width of the dactylopodite, pyriform in section, with a row of 

 tubercles along the grasping edge. Dactylopodite oval in section, 

 also bearing pointed tubercles opposed to those on the fixed finger. 



Length of propodite as broken 35 mm.; width 11.5, thickness 

 7 mm. 



Lower INIarl beds, Lenola, X. J. (Charles W. Johnson). Deep 

 cut of the Chesapeake and Delaware canal (Coll. A. N. S. P.). 



Types are No. 10,120 Coll. Wagner Free Institute of Science, 

 and consist of an imperfect propodite with broken dactylopodite 

 in place, a fragment of the fixed finger, apparently of the same 

 specimen, and a fragment of another hand of larger size, width 

 14, thickness 9 mm. They were exposed Iiy breaking hard nodules 

 which occur in the clay at Lenola. Another broken propodite is 

 in the collection of the Academy from the deep cut of the Chesa- 

 peake and Delaware canal, in Delaware. 



The species is readily recognizable by the long, narrow shape of 

 the hand and the minute punctulation of the surface, the biangu- 

 late lower edge of the fixed finger and hand, etc. It can hardly 

 be the smaller chela of H. gahbl on account of the different 

 surface-sculpture, etc. 



BRACHYURA (?) 



Remains of three crustaceans, probably short-tailed crabs, are 

 contained in the collection of the Academy, but while specifically 

 characteristic by their peculiar sculpture, they are too fragmentary 

 to admit of generic reference, at least from my knowledge of the 

 group. 



One fragment shows keels on a smooth surface, somewhat like 

 the hand of CalUnectes, though it is probably something very 

 different. 



Another (PI. I, fig. 17) seems to be the finger of some very 

 long-handed form. It has three rows of long tubercles along the 

 grasping (?) face, three of smaller ones along the rounded and 

 narrower outer margin, while a furrow runs along each side. This 

 and the preceding are from Monmouth county, N. J., but other 



