annulosa

pl. [Lat. annulus or anulus = a ring.] A sub-kingdom of the Animal Kingdom, corresponding with Cuvier's Articulata. The word Articuluta, signifying jointed, is not a sufficiently distinctive term, for the Vertebrated animals are also jointed. Annu los a, signifying ringed, is decidedly better, for the animals ranked under this sub-kingdom have their skeleton, which is external, composed of a series of rings. Prof. Huxley divides them into Chaetognath a, Annelid a, Crustacea, Arachnid a, Myriapod a, and Insect a, these cla es being ranged in an ascending order. The last four are further grouped together under the designation Arthropod a (q.v.).