. Bulletin of the Natural History Museum Zoology. Fig. 45 Yoldiella lata. Right lateral and dorsal views of shells to show changes in shape with growth. Specimens from Sta. INCAL/DS 06 West European Basin. (Scale = mm). The shell is similar in shape to Yoldiella jeffreysi but more fragile, more compressed, and has fewer hinge teeth on a narrower hinge plate. With increasing length there is a gradual increase in the posterior umbonal length/total length ratio. There is little change in the height/length or width/ length ratios (Fig. 46). Hydroids are present on several specimens at the ante
. Bulletin of the Natural History Museum Zoology. Fig. 45 Yoldiella lata. Right lateral and dorsal views of shells to show changes in shape with growth. Specimens from Sta. INCAL/DS 06 West European Basin. (Scale = mm). The shell is similar in shape to Yoldiella jeffreysi but more fragile, more compressed, and has fewer hinge teeth on a narrower hinge plate. With increasing length there is a gradual increase in the posterior umbonal length/total length ratio. There is little change in the height/length or width/ length ratios (Fig. 46). Hydroids are present on several specimens at the antero-ventral shell margin. Internal morphology (Fig. 47). With the exception of the -W/L 40 8CH H/L 60- 60n * * ⢠â â¢. â *!â â a m L 40 PL/TL -JVJT ^25 15 No. 3=L 3 Length Fig. 46 Yoldiella lata. Variation in the ratios of height H/L, width W/L and postero-umbonal length PL/TL to length against length of a sample from Sta. BG V CP 07 from the West European Fig. 47 Yoldiella lata. Lateral view from the right side of the internal morphology of a specimen from Sta. BG III DS 50 West European Basin (Scale = mm). For identification of parts see Fig. 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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