Annual report of the Commissioners of Inland Fisheries made to the General Assembly . 20 Plate 14. Plate 15. Second-Stage Lobster. Figure 21. Right third walking leg from behind, M=40. This appendageis, in most respects, similar to that of the first-stage lobster. Here is shown afurther stage in the progressive development of the gills, which takes place throughthe early 21 Plate 15. Plate 16. Third-Stage Lobster. Figure 22. (Second Stage.) Right third abdominal appendage (pleopod) from before, M=87. The pleopods of the second, third, fourth and fifth abdom-inal segments appear first,
Annual report of the Commissioners of Inland Fisheries made to the General Assembly . 20 Plate 14. Plate 15. Second-Stage Lobster. Figure 21. Right third walking leg from behind, M=40. This appendageis, in most respects, similar to that of the first-stage lobster. Here is shown afurther stage in the progressive development of the gills, which takes place throughthe early 21 Plate 15. Plate 16. Third-Stage Lobster. Figure 22. (Second Stage.) Right third abdominal appendage (pleopod) from before, M=87. The pleopods of the second, third, fourth and fifth abdom-inal segments appear first, but in a non-functional state, in the second stage. Figure 23. Bight first antenna from above, M = 4S. In the third stage thesegmentation of both exopodite and endopodite are clearly marked. The ;asaljoint is of peculiar form and, the position of the auditory sac is suggested. Figure 24. Right second antenna from above, M = 40. By the third stagethe endopodite has grown out to exceed in length the exopodite. The formershows distinct traces of segmentation, and seta^ have appeared between the seg-ments. In this specimen the retraction of the body of the antenna due to thebeginning of the moulting process is shown.
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Keywords: ., bookauthorrhodeisl, bookcentury1900, bookdecade1910, bookyear1910
