15 



remaining of nearly the same size; below bent squarely at right 

 angles backward, pursuing a straight horizontal course for half the 

 distance to the tip, then curving inward and upward, expanding a 

 little at the united tips, and bearing the inferior armature of minute 

 raised points — not very distant from the pads at the base of the 

 terminal hooks. 



Left clasp: Main body large and gibbous, its base slender, broad- 

 ening pretty regularly, nearly straight in projection. Blade broad 

 at base, narrowing rather rapidly in the basal half, beyond pretty 

 uniform, the tip rounded and thickened, but obliquely docked; basal 

 process directed horizontally backward, bent or curved at base in- 

 wardly, twisted very slightly, with a tendency to bring the inner side 

 uppermost; the whole upper edge is armed with minute recurved 

 denticulations, extending as far as the tip, and on the apical third 

 forming a double row of minuter teeth ; the basal process is a rather 

 small rounded lobe, Avhose general direction is upward, at right angles 

 to the blade, curving a little inward, and having one edge a little 

 concealed by the minute hind process of the lobe; its whole outer 

 edge is covered by recurved denticulations, in continuation of those 

 on the blade ; the terminal portion of the outer surface is also mi- 

 nutely splnulate. Upper process of lobe directed upward, curved 

 inward and thickened a little above, its edge showing indications of 

 obsolete denticulations. 



Rirjlit clasp : Main body similar to that of the opposite side, ex- 

 cepting that it is much broader at the base — nearly as broad as any- 

 where. Blade short, about half as long as the opposite clasp, broad, 

 compressed, the basal half narrowing somewhat, the tip rounded and 

 scarcely excised, the armature as on the opposite clasp; basal process 

 similar to the opposite, but smaller and twisted, so that its inner sur- 

 face is directed backward and a little inward, and this face, instead 

 of the outer, is furnished with spinules; the border is armed as in the 

 opposite piece, but the basal border is free from, although concealed 

 by, the lobe. Each of the processes of the lobe is simple and broadly 

 rounded, the hind scarcely the larger. 



NewJEngland to Florida. 



GROUP rii. 

 Upper organ: crest as in Group ii; hooks separate, moderate; 

 tooth stout, conical. Clasp : blade stout, bent at right angU-s near 

 the middle; right lobe dactylate. 



