. Bulletin of the Natural History Museum (Zoology). Fig. 20 Parerenna emilyae. Bracts of A. the first and B. the second type. Scale 1 mm. and may disappear altogether; the nectosac then being T-shaped. There was a large muscle-free zone on the apical, adaxial part of its lower side. The pallial canal was quite long, extending from the base of the thrust block to beyond the point of origin of the pedicular canal. The long pedicular canal was inserted onto the nectosac either at the point of origin of the lateral radial canals, or slightly basal to it. On half of the fully developed nectophores
. Bulletin of the Natural History Museum (Zoology). Fig. 20 Parerenna emilyae. Bracts of A. the first and B. the second type. Scale 1 mm. and may disappear altogether; the nectosac then being T-shaped. There was a large muscle-free zone on the apical, adaxial part of its lower side. The pallial canal was quite long, extending from the base of the thrust block to beyond the point of origin of the pedicular canal. The long pedicular canal was inserted onto the nectosac either at the point of origin of the lateral radial canals, or slightly basal to it. On half of the fully developed nectophores there was a slight asymmetry in the origin of the lateral radial canals with either the left or the right branching off before the other. The dorsal and ventral canals were straight and ran directly to the ostial ring canal. There was, however, a slight loop in the lateral radial canals as they curved over onto the lateral surface of the nectosac slightly above its mid- height. These canals then curved down to the mid-level and continued to the ostial ring canal. SiPHOSOME. The remaining piece of siphosome was highly con- tracted, with four gastrozooids and four palpons still attached. There were no signs of any gonodendra. Bracts. (Fig. 20). Twenty-two bracts, up to 9 mm in length, remain with the specimen. Two basic types, present in approxi- mately equal numbers, could be distinguished. The first (Fig. 20A) was longer, but narrower, than the second (Fig. 20B). Both types. Fig. 21 Parerenna emilyae. A. Gastrozooid. Scale 1 mm. B. Tentillum and C. Palpon. Scales 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 Natural History Museum (London). Andover : Intercept
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