masked crab

Webster's Dictionary (GCIDE)

1.Wearing a mask or masks; characterized by masks; concealed; hidden. [1913 Webster]

2.(Bot.) Same as Personate. [1913 Webster]

3.(Zool.) Having the anterior part of the head differing decidedly in color from the rest of the plumage; -- said of birds. [1913 Webster]

Masked ball, a ball in which the dancers wear masks.

Masked battery (Mil.), a battery so placed as not to be seen by an enemy until it opens fire. --H. L. Scott.

Masked crab (Zool.), a European crab (Corystes cassivelaunus) with markings on the carapace somewhat resembling a human face.

Masked pig (Zool.), a Japanese domestic hog (Sus pliciceps). Its face is deeply furrowed. [1913 Webster]