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Online Dictionary of Invertebrate Zoology: Complete Work - Best Text

Online Dictionary of Invertebrate Zoology: Complete Work - Best Text

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676Maggenti and Gardneron the inner side <strong>of</strong> the peristomal edge <strong>of</strong> the test thatserves as the attachment for the muscles <strong>of</strong> the masticatoryapparatus.perihemal a. [Gr. peri, around; haima, blood] (ECHINOD) Varioustubular coelomic sinuses that form channels <strong>of</strong> the hemalsystem.perikaryon, pericaryon n.; pl. -karya [Gr. peri, around;karyon, nucleus] The portion <strong>of</strong> the cell that contains thenucleus.perilemma n.; pl. -ae [Gr. peri, around; lemma, bark] (AR-THRO) A layer <strong>of</strong> glial cells beneath the fibrous neurilemmaglanglia.perilymph n. [Gr. peri, around; L. lympha, water] (MOLL:Cephalopoda) In Octopodidae, the liquid that fills the outersac <strong>of</strong> the statocyst.perimetrical attachment organ (BRYO: Stenolaemata) Collarlikemembrane attached to the tentacle sheath and toboth the outer end <strong>of</strong> the membranous sac and skeletalbody wall.perinaeum see perineumperinductura n. [Gr. peri, around; L. inductura, a covering](MOLL: Gastropoda) A continuous outer shell layer formedby the edge <strong>of</strong> the mantle reflected back over the outer lip.perineum n. [Gr. peri, around; enein, to empty out] (ARTHRO:Insecta) The area between the posterior <strong>of</strong> the anus andthe anterior part <strong>of</strong> the external genitalia, especially in females.perineal a.perineural a. [Gr. peri, around; neuron, nerve] Surrounding anerve or nerve cord.perineurium n. [Gr. peri, around; neuron, nerve] (ARTHRO:Insecta) A layer <strong>of</strong> cells beneath the neural lamella in thenerve sheath.perinotum see girdleperiodicity a. [Gr. peri, around; hodos, way] Functions thatoccur at regular intervals or times; rhythm.periodomorphosis n. [Gr. peri, around; hodos, way; morphosis,shaping] (ARTHRO: Diplopoda) In some male Julida, re-

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