. The Cambridge natural history. Zoology. PODOPLEA AMPHARTHRANDRIA 67 Ascidiella scabra at Concarneau), in which the female has lost its segmentation, the mouth-parts and thoracic legs heing purely prehensile, and various species of JEnterocola, parasitic in the stomach of Compound Ascidians, in which the female is a mere sac incapable of free motion, while the male preserves its swim- ming powers and a general Cyclops-ioxm. (Fig. 34). We. Fig. 34.—EiUerucola fulgens. A, Ventral view of 9, X 35; B, side view of <J, x 106. , 1st abdominal segment ; , , 1st and 2nd antennae ; c
. The Cambridge natural history. Zoology. PODOPLEA AMPHARTHRANDRIA 67 Ascidiella scabra at Concarneau), in which the female has lost its segmentation, the mouth-parts and thoracic legs heing purely prehensile, and various species of JEnterocola, parasitic in the stomach of Compound Ascidians, in which the female is a mere sac incapable of free motion, while the male preserves its swim- ming powers and a general Cyclops-ioxm. (Fig. 34). We. Fig. 34.—EiUerucola fulgens. A, Ventral view of 9, X 35; B, side view of <J, x 106. , 1st abdominal segment ; , , 1st and 2nd antennae ; cm, gland-cells ; /t, ventral nerve-cord ; og, oviducal gland ; ov, ovary ; po, vagina ; ^ 1st thoracic appendage ; , ^ 4th and 5th thoracic segments. (After Canu.) Fig. 35.—Asferocheres violaceus, 9 , with egg-sacs, x 57. (After Giesbrecht.) have here the first instance of the remarkable parallelism between the degree of parasitism and the degree of sexual dimorphism, a parallelism which holds with great regularity among the Cope- poda, and can be also extended to other classes of parasitic animals. Fam. 6. Asterocheridae.^—These forms retain the power of swimming actively, and are very little modified in outward appearance by their parasitic mode of life (Fig. 35), though they ^ Giesbrecht, Fauna and Flora G. v. Neapel, Monogr. 25, 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 Harmer, S. F. (Sidney Frederic), Sir, 1862- ed; Shipley, A. E. (Arthur Everett), Sir, 1861-1927. ed. [London, Macmillan and Co. , Limited; New York, The Macmillan Company
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Keywords: ., bookcentury1800, bookdecade1890, booksubjectzoology, bookyear1895
