Text-book of comparative anatomy . gmata of the abdomen ; t, drum of the tympanal auditory organ (after Fischer). not attached to the tympanum itself, but above it to the integument. The Locust !il«-possess, besides the Miillers ganglion with its scolopophores, another series of some-what different scolopophores, lying on a hollowformed by the trachea, which acts as a tympanal auditory organs of the Sanatorialie either (Acridiidcc, Fig. 334) in a single pairat the sides of the first abdominal segment, or(Gryllidcc, Locustidce, Fig. 333) on the tibiae of thefore-legs. In the last
Text-book of comparative anatomy . gmata of the abdomen ; t, drum of the tympanal auditory organ (after Fischer). not attached to the tympanum itself, but above it to the integument. The Locust !il«-possess, besides the Miillers ganglion with its scolopophores, another series of some-what different scolopophores, lying on a hollowformed by the trachea, which acts as a tympanal auditory organs of the Sanatorialie either (Acridiidcc, Fig. 334) in a single pairat the sides of the first abdominal segment, or(Gryllidcc, Locustidce, Fig. 333) on the tibiae of thefore-legs. In the last case there are generally oneach tibia 2 tympana lying opposite one the basal portions of the maxillae ofScutigcra, there lies on each side a pouch, fromthe base of which small closely-packed plates andhairs rise into the cavity. These plates and hairsstand on equally closely arranged folds of thecuticle. It has been conjectured that these forma-tions, which need further examination, may proveto be auditory tz PIG. 335.—Sensory organs con-sidered to be olfactory at the endof the Antennas of lulus Sabulosus, longitudinal section through the an-tenna, k, Sensory cones; z, sensorypoints; gk, ganglia of the sensorycones; gz, ganglia of the sensorypoints; n, nerve; grz, large cells inthe ganglia of the sensory cone (afterv. Rath). C. Olfactory Organs—Gustatory Organs. The seat of the sense of smell is, as inthe Crustacea, to be sought in the antenna?(and perhaps in the maxillar palps as well).The antenna? are in the Insecta veryoften more strongly developed in themales than in the females. The olfactoryorgans are short processes in the shape ofknobs or cones, and generally open atthe point; they are found either freeor at the base of pits in the antenna. vi AXTJ-XXATA—THE CIRCULATORY SWTEM 475 Beneath each olfactory process there is a pore in the cuticle, throughwhich the fibrilhe of a hypodermal ganglion pass (Fig. 335). Similarterminal apparati, whic
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Keywords: ., bookcentury1800, bookdecade1890, booksubjectanatomycomparative
