. Bulletin of the Museum of Comparative Zoology at Harvard College. Zoology. 210 BULLETIN : MUSEUM OF COMPARATIVE ZOOLOGY 23 specimens, 190-375 mm, from 8 stations off British Guiana (07°05'-07°38') in 135-275 fathoms; also 2 abnormal specimens (p. 215), 250-349 mm, from 2 stations off the mouth of the Ama- zon River (Lat. 01°45'-01°49'N) in 225-275 fathoms. Distinctive characters. This species differs further from fis- cheri, its only known genus mate, in lacking enlarged thorns along the margin of orbits and in the scapular region and in having the prickles on the tail sparsely distributed a
. Bulletin of the Museum of Comparative Zoology at Harvard College. Zoology. 210 BULLETIN : MUSEUM OF COMPARATIVE ZOOLOGY 23 specimens, 190-375 mm, from 8 stations off British Guiana (07°05'-07°38') in 135-275 fathoms; also 2 abnormal specimens (p. 215), 250-349 mm, from 2 stations off the mouth of the Ama- zon River (Lat. 01°45'-01°49'N) in 225-275 fathoms. Distinctive characters. This species differs further from fis- cheri, its only known genus mate, in lacking enlarged thorns along the margin of orbits and in the scapular region and in having the prickles on the tail sparsely distributed and minute in size while on fischeri there are prominent orbital and scapular thorns and the prickles on the tail are densely distributed and large in size. Also, the pelvic fins have 12 to 15 radials, in addi- tion to the first stout one, whereas fischeri has 18 to Figure 11. Pseudoraja atlantica, dorsal view of type, female 450 mm long; section of tail about ; thorns from along middle of disc, about xl2; caudal fin and ending of tail fold, about Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of these illustrations may not perfectly resemble the original Harvard University. Museum of Comparative Zoology. Cambridge, Mass. : The Museum
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Keywords: ., bookauthorharvarduniversity, bookcentury1900, booksubjectzoology
