IS0P()D8 OF NORTH AMERICA. 563 



distinct; the last ihivo arc fuscul in the terminal piece, which is tri- 

 lobate, a lateral lobe on either side and a laro-er median posterior lobe. 



There are no uropoda. This species is named foi- Pi'. W. T. Caiman, 

 the Scotch naturalist. 



Only one specimen was collected ])v the V . S, Bureau of Fisheries 

 steamer Alhafroxx at Station 44:21, between Santa Bai'l)ara and San 

 Nicolas, California. 



The type is in the U. S. Nat. Museum. Cat. No. 82073. 



96. Genus BOPYRINA Kossmann. 



Branchial parasites. 



Female with segments of abdomen fused in the middle, more or less 

 defined at the sides; lateral parts or pleural lamelhe not developed. 



Pleopoda rudimentary; tirst four pairs single-branched, simple, last 

 ymir wanting. Uropoda wanting. 



]\Iale with all the segments of the thorax distinct. Segments of the 

 abdomen fused in the middle, but more or less defined at the sides. 



ANALYTICAL KEY TO THE SPECIES OF THE GENUS BOPYRINA. 



a. Segments of the abdomen in female defined only on one side of the body. 



Bopifrirta (tbbreviata Richardson 

 a^. Segments of the abdomen in female distinctly defined on both sides of the 

 abdomen. 

 h. First incubatory lamellic witii tlie distal segment produced in a linguiform lobe 



at the outer })Osterior extremity liopjirina urocaridis Richardson 



b\ First incubatory lamelhe with tlu' distal segment roundly produced at the 

 inner posterior extremity Bopijriiia thorii Richardson 



BOPYRINA ABBREVIATA Richardson. 



Bopyrinn ablnrriata Richardson, Proc. U. S. Nat. Mus., XXVII, 1904, ])p. 71-73. 



Locality. — Puntarasa, Florida, on Hippolyte 

 zostericola (Smith). 



Body of adult female veiy asymmetrical, one 

 side being very much longer than the other. 

 Color entirely white with a few black dots scat- 

 tered irregularly over the dorsal surface. 



Head large, turned to the shorter side; frontal 

 border produced in a rounded lobe in the middle. 

 Antero-lateral angles produced in narroAV lobes 

 or processes. Eyes small, distinct. 



The segments of the thorax are distinctly de- 

 tined. The epimera on the longer side of the body pi,; 620.— bopykina ab- 

 are distinct on the first thr(>e segments, where hheviata. dorsal view 

 they occupy the anterior portion of the lateral 

 margin, but it is impossible to distinguish them on tli(> shorter side. 

 Ovarian bosses are not present on any of the segments. The epimera 



