Annual report of the Commissioners of Inland Fisheries made to the General Assembly . 45 Plate 32. Plate 33. Fourth-Stage Lobster. Figure 46. Bight second walking leg from behind, M=23. The walkinglegs of the fourth-stage lobster have elongated. The exopodite is reduced to arudiment, still attached to the basipodite, but non-functional. The claw has nowreached nearly the adult structural type, but the dactyl, which in the chelipedsunderwent a torsion through about 90 degrees, still opens upward and slightlyoutward. The podobranchs have further developed, and coxopoditic settr arepresent. Figur
Annual report of the Commissioners of Inland Fisheries made to the General Assembly . 45 Plate 32. Plate 33. Fourth-Stage Lobster. Figure 46. Bight second walking leg from behind, M=23. The walkinglegs of the fourth-stage lobster have elongated. The exopodite is reduced to arudiment, still attached to the basipodite, but non-functional. The claw has nowreached nearly the adult structural type, but the dactyl, which in the chelipedsunderwent a torsion through about 90 degrees, still opens upward and slightlyoutward. The podobranchs have further developed, and coxopoditic settr arepresent. Figure 47. Right third walking leg from behind, M = 23. Except for thespike-like dactyl, the conditions are the same as in the case described 47 Plate 33, Plate 34. Fourth-Stage IjObster. Figure 48. Sight second abdominal appendage (pleopod) seen from behind,M=29. The endopodite and exopodite have become more blade-like than in thethird stage, and are now strongly functional. Their edges are fringed with longfeathered setae. Figure 49. Right sixth abdominal appendage from above, M:=30. Boththe exopodite and endopodite are larger and stronger than in the third are fringed about the edge with a thick mat of feathered setae. «\ft hriR a\Vv)oc^ox3 oil-
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Keywords: ., bookauthorrhodeisl, bookcentury1900, bookdecade1910, bookyear1910
