Archive image from page 113 of Decapod crustaceans of the northwest. Decapod crustaceans of the northwest coast of North America .. decapodcrustacea00rath Year: 1904 104 RATHBUN Strongly arched over the eye, and armed with 12 to 14 small teeth; the posterior 3 or 4 behind the orbit, the posterior 2 distinctly separated from the others; the hindermost is much depressed, obsolescent; the distal third of the rostrum is 'Straight, either horizon- tal or slightly deflexed, acute, unarmed above, furnished with i or 2 teeth below; lower limb very narrow. Antennal spine well developed, pterygosto
Archive image from page 113 of Decapod crustaceans of the northwest. Decapod crustaceans of the northwest coast of North America .. decapodcrustacea00rath Year: 1904 104 RATHBUN Strongly arched over the eye, and armed with 12 to 14 small teeth; the posterior 3 or 4 behind the orbit, the posterior 2 distinctly separated from the others; the hindermost is much depressed, obsolescent; the distal third of the rostrum is 'Straight, either horizon- tal or slightly deflexed, acute, unarmed above, furnished with i or 2 teeth below; lower limb very narrow. Antennal spine well developed, pterygostomian very small. Eyes large, pyriform. _ c- . ⢠⢠c. .- ' CM t Antennular peduncle Fig. 47. Spirontocans avina. Station 2853. a. Side of carapace 'â (X 3)- <. Dorsal view of anterior portion (X 4)- extending tWO tllirds the length of the antennal scale, second segment three times as long as third, outer basal scale suberect and not reaching end of first segment; flagella subequal in length; thickened part of outer one extending half its length beyond antennal scale. Outer margin of antennal scale a little more than two thirds as long as carapace, scale tapering, distal margin very oblique, peduncle extending quite to middle of scale and nearly to end of second segment of antennular peduncle. The outer maxillipeds extend beyond the scale by nearly half the length of their last segment. First pair of feet reaching half-way between antennal peduncle and end of scale; second pair exceeding maxilliped by the length of the propodus and the last joint of the carpus; third to fifth pairs nearly equal, the fifth pair overreaching the second pair; dactyli very slender and unarmed. Abdomen smooth; fourth segment furnished with a lateral spine; sixth segment a little less than twice as long as fifth, and shorter than seventh, which bears 3 spinules on each side. 3/<7/?. âSmaller, more slender, and has slightly longer antennulae than the female. Di7nefisions. â YQXi\z\.Q., l
Size: 1762px × 1135px
Photo credit: © Bookive / Alamy / Afripics
License: Licensed
Model Released: No
Keywords: 1900, 1904, americana, archive, biodiversity, book, bookauthor, bookcentury, bookcollection, bookcontributor, bookdecade, bookpublisher, booksubject, bookyear, crustacea_north_america, drawing, historical, history, illustration, image, new_york, page, picture, print, rathbun_mary_jane_1860_1943, reference, smithsonian_libraries, vintage
