. Bulletin. Science; Natural history; Natural history. RESEARCH NOTES 37. Fig. I. Ischiwchiion imuieuni, n. sp. A. Paratype. mm long, LACM-AHF 1854, dorsal view; B. Same paratype. lateral view; C, Girdle scales of holotype, LACM-AHF 1853: D. Scales on under- side of girdle of holotype. Tegmentum a light brown color throughout; lateral areas of intermediate valves well-defined, but only moderately raised, bearing round tubercles, about 80 /um in diameter and height, v\hich seem to be disposed in four or five radial series: tubercles separated by a distance greater than twice their diameter:
. Bulletin. Science; Natural history; Natural history. RESEARCH NOTES 37. Fig. I. Ischiwchiion imuieuni, n. sp. A. Paratype. mm long, LACM-AHF 1854, dorsal view; B. Same paratype. lateral view; C, Girdle scales of holotype, LACM-AHF 1853: D. Scales on under- side of girdle of holotype. Tegmentum a light brown color throughout; lateral areas of intermediate valves well-defined, but only moderately raised, bearing round tubercles, about 80 /um in diameter and height, v\hich seem to be disposed in four or five radial series: tubercles separated by a distance greater than twice their diameter: spaces ap- parently left by dislodged, broken tubercles produce a seemingly disordered dis- tribution of tubercles on lateral areas, in anterior valve, and in postmucro portion of posterior valve: central areas of intermediate valves covered with vsell-formed. round, somewhat flat-topped granules, measuring about 40 /xm in diameter: in jugal areas, these granules are crowded mostly in quincunx, but in pleural areas are arranged in neatly defined longitudinal ribs, about 10 per side, which curve inwardly as they converge anteriorly: in posterior valve, mucro is discrete and definitely anterior: postmucro area is moderately concave. Girdle lightly banded in two tones oi brown, covered with imbricated, oval scales up to 100 /xm in length, and with 8-U) well-cut striations (Fig. IC): a fringe of fine spicules (about 15 in diameter) at outer margin of girdle, mostly short except for an occasional very long one (up to 300 tim): imdersidc of girdle co\ered with very thin rectangular scales. 50 x 20 /xm in size, many bearing a pointed mammilla pointing towards periphery (Fig. ID).. 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 Southern California Academy of Sciences. Los Angeles, Calif. : The Academy
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