. The earthworms (lumbricidae and sparganophilidae) of Ontario. Lumbricidae; Worms. papilla ( f.) A protruding dermal structure. parietes (Fr. parietes m.) Walls or sides of structures. parthenogenesis (Fr. parthenogenese f.) Uniparental reproduction in which the ova develop without fertilization by spermatozoa. Cf. amphimictic. penial setae (Fr. soies de la verge m.) See seta. peregrine () Widely distributed, not necessarily involving man. periproct (Fr. pygidium m.) (pp) The terminal (last, caudal) "segment" of the body, without coelomic cavity, asetal. peristo
. The earthworms (lumbricidae and sparganophilidae) of Ontario. Lumbricidae; Worms. papilla ( f.) A protruding dermal structure. parietes (Fr. parietes m.) Walls or sides of structures. parthenogenesis (Fr. parthenogenese f.) Uniparental reproduction in which the ova develop without fertilization by spermatozoa. Cf. amphimictic. penial setae (Fr. soies de la verge m.) See seta. peregrine () Widely distributed, not necessarily involving man. periproct (Fr. pygidium m.) (pp) The terminal (last, caudal) "segment" of the body, without coelomic cavity, asetal. peristomium (Fr. peristomium m.) (ps) The first body segment, asetal, and con- taining the mouth (Fig. 2).. pH ( m.) An indication of acidity or alkalinity measured as the negative logarithm of the hydrogen-ion concentration, and expressed in terms of the pH scale (0-14) where pH 7 is neutral, less than 7 is acidic, and more than 7 is alkaline. Previously, North American studies employed an aqueous solution to make soil pH readings, and these are the figures given in the text, but varia- tions can occur when the amount of water present in the soil changes as well as when the amount of dissolved gases in this water, , C02, changes. To overcome these variations in the pH readings, one of several salt solutions of differing strengths may be employed instead of water, , KC1 or CaCl:. (For details, see Peech, 1965.) pharynx (Ft. pharynx m.) (ph) The portion of the gut between the buccal cavity (anterior) and the oesophagus (posterior) (Fig. 2). pinnate () Divided in a feathery manner. polymorphism (Fr. polymorphisme m.) Occurrence of different forms of individ- uals within the same species. postclitellate adult (Fr. adulte apres clitellum, postclitellienne f.) Postreproduc- tive individuals without a clitellum but with areas of discolouration in the re- gions of the clitellum, and with genital markings. If these discolourations 26. Please note that these images are e
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