The embryology and metamorphosis of the Macroura . WK. Uroohs,dU. •inCadalJtMinfKH^^^* ALPHEUS 502 MEMOIES OF THE NATIONAL ACADEMY OF SCIENCES. Plate XX. Metamorphosis of Alphcus heierocheUs from Beaufort, North Carolina, drawn from nature by W. K. Brooks. Fig. 1. Embryo just before hatching. Fig. 2. View of a larva which was captured in the tow net at Old Topsail Inlet, North Carolina,June 25, 1883. It is about eighteen one-hundredths of an inch long, and is a littleyounger than the one shown in PI. xvii. Fig. 3, and a little older than that shown inFig. 3 of this plate. Fig. 3. Ventral view
The embryology and metamorphosis of the Macroura . WK. Uroohs,dU. •inCadalJtMinfKH^^^* ALPHEUS 502 MEMOIES OF THE NATIONAL ACADEMY OF SCIENCES. Plate XX. Metamorphosis of Alphcus heierocheUs from Beaufort, North Carolina, drawn from nature by W. K. Brooks. Fig. 1. Embryo just before hatching. Fig. 2. View of a larva which was captured in the tow net at Old Topsail Inlet, North Carolina,June 25, 1883. It is about eighteen one-hundredths of an inch long, and is a littleyounger than the one shown in PI. xvii. Fig. 3, and a little older than that shown inFig. 3 of this plate. Fig. 3. Ventral view of a larva little younger than Fig. 2. Fig. 4. Telson and swimming appendages of the larva shown in Fig. 3. Fig. 5 First maxilla of the same larva. Fig. (i. Second maxilla of the same larva. Fig. 7. First maxilliped of the same larva. Fig. 8. Second maxilliiied of the same larva. Fig. 9. Third maxilliped of the same larva. Plata Brooks, ALPHEUS 3«a«aWjMiBaLm|w^>ft|Cc fc-1ik 504 MEMOIRS OF THE NATIONAL ACADEMY OF SCIENCES. Plate XXI. Fig. 1. First larva of Alpheus saulcyi, var. breiHcarpus, from loggerhead sponge. Hatched at 4 p. m., June 10, 1887. A small amount of unabsorbed food yolk remains in the stomach. la. Line to indicate length of larva. °.Fig. 2. Second larva of same, from brood hatched on evening of June 8. Food jolk nearly absorbed. About tweuty-four hours old. 2a. Line to show length of larva. 3. Head of young from same brood. Four days old. 4. Right first pereioi)od of larva of A. saulcyi, var. brevicarpus, before the molt preparatory to stage shown in Pig. 1. Seen from inner side. x52. Swimming hairs of exopodites 5. Egg embryo of A. saulcyi, var. longicarjyus, nearly ready to hatch. The large chela of the left first pereiopod is conspicuous below the autenni*. 5a. To show natural size of the same. Slightly to
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Keywords: ., bookauthor, bookcentury1800, bookdecade1890, booksubjectcrustacea
