The embryology and metamorphosis of the Macroura . ig. 2. 4. First pleopod of male of ^. saulci/i, from loggerhead sponge. 5. Left first pleopod of female of A. saulcyi, from -loggerhead sponge. A single egg is seen, attached to three hairs of the protopodite. The hairs are coated with glne, and the gluey threads are twisted into a chord, which is continuous with a tbin sheet of this sul)stance (the membrane of attachment or secondary egg-memJbraue which envelopes the egg). Below is seen a single hair, from which an egg has broken loose. Drawn from an alcoholic specimen. x33.
The embryology and metamorphosis of the Macroura . ig. 2. 4. First pleopod of male of ^. saulci/i, from loggerhead sponge. 5. Left first pleopod of female of A. saulcyi, from -loggerhead sponge. A single egg is seen, attached to three hairs of the protopodite. The hairs are coated with glne, and the gluey threads are twisted into a chord, which is continuous with a tbin sheet of this sul)stance (the membrane of attachment or secondary egg-memJbraue which envelopes the egg). Below is seen a single hair, from which an egg has broken loose. Drawn from an alcoholic specimen. 6. Right second pleopod of larger female of A. saulcyi, showing a number of eggs attached, seen from behind, x 7. First maxilla of A. saulcyi. Endopodite bent out of , to a point below the large coxopodite. x 8. Large chela of female of A. saulcyi, from loggerhead sponge. Compare with the brevi- carpus shown in PI. iv. x 33,Pig. 9. Right second maxilla of A. saulcyi, seen from outer side. x64. Plate^ XXIV Fiil ^J<,,JeJ. ALPHEUS SAULCYI, n&W,IMML*ipt)A«|^ lb*T«b 512 MEMOIRS OF THE NATIONAL ACADEMY OF SCIENGES. Plate XXV. Fig. 1. Surface view of segmenting egg of Hippa talpoiden. Thirty-two yolk pyramids Fig. 2. Embryo of Hippa talpoides, showing optic disks and thoracic-abdominal plate. x38. Fig. 3. The central part of a transverse section of the ovary of the lobster, Homarus americanus,to show the progressive development of ova; from the same series as that repre-sented, with less enlargement, in Fig. 6. Ovary taken in January. x281. Fig. 4. Section of egg of Hippa talpoides in yolk segmentation. Sixty-four yolk pyramids pres-ent. X 70. Fig. 5. Part of segmenting egg of Alpheus minor, showing a single large nucleus and two smallernuclei. Compare with Fig. 23. x281. Fig. 6. Central portion of transverse section of ovary of the lobster, coiresponding nearly to thatshown in Fig. H, showing the germogenal areas and th
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Keywords: ., bookauthor, bookcentury1800, bookdecade1890, booksubjectcrustacea
