Bulletin of the Bureau of Fisheries . basal projection. Among males of intermediate size this projection is of variable length, but never solarge as in the largest specimens. The fact that the two types of hand are found in individuals ofabout equal size may be accounted for on the supposition that the one form is younger than the otherand has not passed through the requisite number of molts to attain the final form, but has grownmore rapidly. The rate of growth depends largely on food supply, which may vary considerably indifferent situations. One individual might easily attain the size of an
Bulletin of the Bureau of Fisheries . basal projection. Among males of intermediate size this projection is of variable length, but never solarge as in the largest specimens. The fact that the two types of hand are found in individuals ofabout equal size may be accounted for on the supposition that the one form is younger than the otherand has not passed through the requisite number of molts to attain the final form, but has grownmore rapidly. The rate of growth depends largely on food supply, which may vary considerably indifferent situations. One individual might easily attain the size of another without having passedthrough so many periods of molting. Ischyrocerus anguipes Kroyer. Cerapus fuckola Stimpson, Marine Invert. Grand Manan, p. 4s, tig. 34, Smith, Rept. U. S. Fish Coin. 1871-72, p. 566. Male: Eyes nearly round; first antenna- considerably shorter than second; second joint of pedun-cle a little louger than third and nearly twice as long as first; flagellum shorter than last two joints of. 0r» \ Ischyrocerut anguipcs. Marblebead Beach, Mass. peduncle; secondary flagellum very small, consisting of an elongate joint and a minute terminal joint;second antenna stout and elongate, last two joints of peduncle of subequal length; flagellum shorterthan last joint of peduncle, and composed of five or six joints, of which the first is longest; terminaljoints with curved spines; first four coxa] plates subquadrate, about as deep as long and as high astheir respective segments; first gnathopods small, basal joint broad; carpus rounded and setosebehind; hand subovate, palm very oblique and nearly straight, a row of four or five seines beginningnear end of palm and extending along posterior margin of hand, finger with inner margin acutelyserrate; second gnathopods large, much elongated, basal joint narrow, elongate, gradually wideningdistally and curved forward, lower anterior angle produced downward into a rounded lobe; ischium 514 BULLETIN OF
Size: 2100px × 1190px
Photo credit: © The Reading Room / Alamy / Afripics
License: Licensed
Model Released: No
Keywords: ., bookcentury1900, bookdecade1900, booksubjectfisheries, bookyear19
