. Bulletins of American paleontology. . Text-figure 5. —Brissopsis jimenoi Cotteau. A, dorsal view; B. ven- tral view, NMB M9747. x 1. that the test was covered at or very soon after death. The test is flattened and weathered, obscuring the fas- cicles. Shape and size. —Test, 65 mm long, 54 mm wide (83 %L), height, 25 mm (38 %L). Apical , located at distance from anterior margin to center of genital pores equal to 50 %L. Four genital pores, ethmolytic with genital plate 2 extending far posteriorly. .4;7;/')»/aa(3. —Anterior ambulacrum not petaloid, in groove extending from apica
. Bulletins of American paleontology. . Text-figure 5. —Brissopsis jimenoi Cotteau. A, dorsal view; B. ven- tral view, NMB M9747. x 1. that the test was covered at or very soon after death. The test is flattened and weathered, obscuring the fas- cicles. Shape and size. —Test, 65 mm long, 54 mm wide (83 %L), height, 25 mm (38 %L). Apical , located at distance from anterior margin to center of genital pores equal to 50 %L. Four genital pores, ethmolytic with genital plate 2 extending far posteriorly. .4;7;/')»/aa(3. —Anterior ambulacrum not petaloid, in groove extending from apical system to peristome; pore pairs largest adapical to peripetalous fascicle; minute between fascicle and phyllcde; 56 plates in ambula- crum. First enlarged pore pairs in plate 7. Anterior petals (II and IV) curved convexly ante- riorly with their greatest width near end of petal; de- pressed in groove. Span of ends of petals = %L. Short, with length slightly greater than one-half dis- tance from apical system to ambitus; length = 21 %L; greatest width = %L; 44 petaloid pore pairs in each petal; pore pairs in anterior poriferous zones reduced in size adapically. First petaloid pore pair in plate 12. Posterior petals (V and I) confluent for three-fifths distance from apical system to end of petals, sharing common groove; curving away from each other dis- tally; short, length = 25 %L; greatest width = %L; 48 pore pairs. Petaloid pore pairs in posterior porifer- ous zones greatly reduced in size from apical system for three-fifths length of petal. First petaloid pore pair in plate 19. Peristome. — Anterior, distance from anterior edge of peristome to anterior margin = 24 %L; width of opening = 21 %L; height = 7 %L. fm/7TO<r?. —Inframarginal, large, width = 15 %L. height = 12 %L, occurring within plates 5-9. Fascioles.—Only short tract of peripetalous fascicle preserved in lobe extending anteriorly in anterior am- bulacrum (III), crossing plate 7 at dis
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