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18952] HYDBACHNID POUND IN COENWALL. 205 Bibliography of the principal Treatises on the Internal Anatomy of the Hydrachnidce and some allied Families referred to in the foregoing paper. CEONEBEEO, A. " On the Anatomy of Eylais extendens (Miiller). With observations on allied forms." In Russian, in ' Nacb-richten Gesellsch. der Freunde der Naturkunde.' Moscow, 1878. A short summary in German, called " Ueber den Bau der Hydrachniden," in Zool. Anzeiger, 1878, Nr. 14, p. 316. . "Ueber den Bau von TrombidiumP Bull. Soc. JNat. de Moscou, 1879, part 2, p. 234. HENKIN, H. " Beitrage zur Anatomie, Entwicklungsgeschichte und Biologie von Trombidium fuliginosum, Herm." Zeitschr. fur wiss. Zool. Bd. xxxvii. (1882) pp. 554-663. NALEPA, A. " Die Anatomie der Tyroglyphen." Sitzb. d. k. Akad. d. Wissensch. Wien, Bd. xc. Abth. 1, p. 198 (1884); Bd. xcii. Abth. 1, p. 116 (1885). PAGENSTECHEE, H. A. " Beitrage zur Anatomie der Milben." Heft I. Leipzig, 1860. SCHAUB, E. VON. " Ueber die Anatomie von Hydrodroma (C. L. Koch). Ein Beitrag zur Kenntniss der Hydrachniden." Sitzb. d. k. Akad. d. Wissensch. in Wien, Bd. xcvii. Abth. 1, p. 98 (1888). . " Ueber marine Hydrachniden, nebst einigen Bemerkungen iiber Midea (Bruz.)." Ibid. Bd. xcviii. Abth. 1, p. 163 (1889). EXPLANATION OF THE PLATES. LETTERING. A. Anus (so-called). It is really the orifice for the discharge of the excretory organs only, not apparently of the alimentary canal. ac. Air-chamber ; this is the hollow within the chitinous sigmoid piece. ap. Anal plate. ar. Areolations in the larger chitinous plates. B. Endoskeletal " chitinous bridge" forming the floor upon which the mandibles run, and also forming a rigid base of attachment for the outlet of the salivary ducts and for the ligament from the sigmoid piece. br. Brain. C. Cuticle. cb. Chitinous bar forming a base of attachment for muscles. cc. Clear yellow chitin. coe. Anterior (azygous) cascuni of the ventriculus. cm. Chitinous external tunic of genital sucker, convex exteriorly (meniscus-shaped). cp. Chitinous areolated plates in the cuticle (larger kind). cs. Chitinous plates in cuticle more finely aud regularly perforated (smaller kind with hair). ct. Connective tissue. D. C o m m o n duct of the three salivary glands (so-called) on one side of the body, viz., the quadrate, the reniform, and the tubular salivary glands. db. Bell-shaped mouth of same. de. Ductus ejaculatorius. |
