|260 CRUSTACEA. 



Subfamily MIRACINiE. 



Genus MIRACIA. 



Corpus subcylindricum. Frons ducts appendices parvulas falciformes 

 subtus gerens. Antennae anticce flexiles, appendiculatce. Pedes antici 

 mediocres, monodactyli, digito tenui. Pedes duoproximi biremes, latera- 

 literpaulo porrecti. Appendices quatuor abdominis basales elongatl seti- 

 gerce. Setce caudales elongates. 



Body subcylindrical. Front with two small falciform appendages. An- 

 terior antennae flexible, appendiculate. Anterior feet of moderate 

 size, monodactyle, finger thin. Next pair of feet two-branched, late- 

 rally extended. Four appendages of abdomen near base long seti- 

 gerous. Caudal setae elongate. 



The Miraciae have the general structure of the Setellae, being similar 

 to them in their abdomen, antennas, abdominal and thoracic feet, though 

 the body is stouter anteriorly, and not pointed in front. They differ 

 from them in the large conspicilla, which occupy the front of the head. 

 As the parts were opaque, excepting these oblate cornea, an intermediate 

 pair of eyes could not be distinguished. In the specimens of one 

 species (female, and we think also male), the anterior segment of the 

 body was much stouter than the following. In another species, the 

 specimen seen had the body uniformly even in size, though gradually 

 tapering posteriorly. 



The Miraciae occur in the tropical part of both the Atlantic and 

 Pacific Oceans. They move less by leaps than is common with the 

 Cyclopoidea, having usually a continuous motion. The body is very 

 flexible, and goes wriggling along, but with great rapidity. 



MlRACIA EFFERATA. 



Corpus 10-articulatum, segmento antko valde latwre, aliis sensim atte- 

 nuatis. Conspicilla fronte insita, maxima, valde prominentia, con- 

 tigua. Antennae anticce mediocres, 7 -articulates, articulis tertio qumto 

 septimoque brevibus. Styli caudales oblongi, setis duplo longioribus. 



