. Bulletin of the Museum of Comparative Zoology at Harvard College. Zoology; Zoology. 16 BULLETIN : MUSEUM OF COMPARATIVE ZOOLOGY. the future ethmoid, nearly into halves. The line falls midway between the two arms of the trabeculse, where they diverge to allow space for the pituitary body. In front the ethmoidal mass overlaps slightly, on either side, Meckel's cartilage a little behind its points of sharpest curvature. In the flatfishes there is no distinct " tentorium," or tegmen cranii, extending backward from the ethmoid to roof over the front part of the brain case, as there is i
. Bulletin of the Museum of Comparative Zoology at Harvard College. Zoology; Zoology. 16 BULLETIN : MUSEUM OF COMPARATIVE ZOOLOGY. the future ethmoid, nearly into halves. The line falls midway between the two arms of the trabeculse, where they diverge to allow space for the pituitary body. In front the ethmoidal mass overlaps slightly, on either side, Meckel's cartilage a little behind its points of sharpest curvature. In the flatfishes there is no distinct " tentorium," or tegmen cranii, extending backward from the ethmoid to roof over the front part of the brain case, as there is in the salmon. b. Stage IL, Between Stages I. and II. there is an interval of six weeks and the manner of differentiation of the many cartilages and projections found trb. su^orb. dx. (rb. Vcis. â¬th. dx. - trb. su^orb. s. p. trb. sn^orb. s. a. vis''eth. â t'cw. eth. s. ec^eth. crt. orb. a. pt-pal. dx. Z ba-hy. crt. mk. Fig a. Oblique view of the facial cartilages of P. americanus, Stage II. Photographed from a wax model (Born's method) seen from a point midway between sagit- tal and transverse planes and about 30^ above the horizontal plane, x 75. For meaning of lettering, see Abbreviations under Explanation of Plates. in Stage II. (Fig. A and Plate 2, Fig. 10) cannot be traced here. Figure 10 is a dorsal view of the facial cartilages of this stage. But, as it gives a less complete view than the model of the same specimen (Fig. A), 1 call attention to the two supraorbital bars only â the com- plete one on the right (trb. su'orb. dx.), fastened to the right ethmoid wing, and the two parts (a. and p.) of the left one, between which is. 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: ., bookauthorha, bookcentury1800, bookdecade1860, booksubjectzoology
