ISOPODS OF NOETH AMERICA. 



243 



FIG. 250. M EINERTIA 



TRANSVERSA. HEAD. 



MEINERTIA TRANSVERSA Richardson. 



Meinertia transversa RICHARDSON, American Naturalist, XXXIV, 1900, p. 221; 

 Proc. U. S. Nat. Mus., XXIII, 1901, pp. 529-530. 



Locality. Between the delta of the Mississippi and Cedar Keys, 



Florida. 



Head very little immersed in first thoracic segment, large, subtrian- 



gular, anterior margin pointed with sides slightly sinuate. Eyes 



situated at extreme post-lateral margins, almost 



obscure. First pair of antennae, with joints 



dilated, issuing close together, eight articulate. 



Second pair of antennae slender, extending a 



little beyond posterior margin of first thoracic 



segment; fourteen jointed. 

 Thoracic segments subequal in length. 

 Abdomen not at all immersed. All the seg- 

 ments visible and equal in width and length. Terminal segment sub- 

 triangular with apex 

 round, impressed at 

 the base, equal in 

 length to the first five 

 segments taken to- 

 gether. Uropoda a 

 little longer than 

 apex of terminal seg- 

 ment, branches simi- 

 lar in shape, oar-like, 

 and of equal length. 

 Legs increasing in 

 length from first to 

 seventh pair. 



FIG. 261. MEINERTIA TRANSVERSA. a, MAXILLIPED. x 20. b, 

 SECOND MAXILLA, x 39. c, FIRST MAXILLA, x 39. d, SEVENTH 

 LEG. x 11*. 



Color yellowish brown. 



One specimen from between the delta of the Miss- 

 issippi and Cedar Keys, Florida, collected by the 

 U. S. Bureau of Fisheries' steamer Albatross. 



Type. Cut. No. 9728, U.S.N.M. 



39. Genus AGARNA Schioedte and Meinert. 



Body compressed from side to side and hunched, 

 very asymmetrical. One side of the posterior seg- 

 ments of the thorax flattened and dilated. 



Head deeply immersed. First pair of antenna separated but little 

 at the base, almost contiguous, rather compressed. 



Anterior margin of the first thoracic segment very deeply sinuated; 

 antero-lateral angles scarcely produced, rounded. Epimera present 



FIG. 252. MEINERTIA 

 TRANSVERSA. AB- 

 DOMEN. 



