ISOPODS OF NORTH AMERICA. 



243 



Fig. 250. — M E I N E K T 1 

 TKANSVEKSA. HEAD. 



MEINERTIA TRANSVERSA Richardson. 



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

 Proc. IT. S. Nat. Mas., XXIII, 1901, pp. 529-530. 



Locality. — Betwoen the delta of the Mississippi and Cedar Keys, 



Florida. 



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



gular. anterior maroin 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 antenna? slender, extending a 



little beyond posterior margin of tii-st 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, ecjual 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. 251,— Meinertia transversa. «, Maxilliped. x 2O5. ft, 

 Second maxilla, x 39. c. First maxilla, x 39. d, Seventh 



LEG. X II5. 



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 Alhatross. 



7't/pt.— Cut No. 9728, U.S.N.M. 



39. Genus AGARNA Schicedte and Meinert. 



Body compressed from side to side and hunched, p^Q. 2.52.-meinektia 

 very asynnnetrical. One side of the posterior seg- transversa, ab- 

 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 ver}- deeply sinuated; 

 antero-lateral angles scarcel}' produced, rounded. Epimera present 



