A treatise on zoology . A/\Br-0 J 03 U (BJdJi Jimj. Fio. LXIII. :^ Znphocrhius hownrdi, from a .siiecinien in the collection of Hon. F. Springer. 1, fromposterior, x ? ; 2, oral .snrface, *( \; 3, dissection of plates. this may be so in some specimens ; these arm-plates may be comparedwith the arms of Catillocrinidae, but whether they bore further Br isuncertain. The tetramerism of this genus affects the cup only, and was pro-duced by fusion, not by atrophy as was probably the case in Herpetocrinu!^.Family 8. Haplocrixidae. Monocyclica Inadunata, with 5 BB, 5RR, of which 1. ant., r. post, and
A treatise on zoology . A/\Br-0 J 03 U (BJdJi Jimj. Fio. LXIII. :^ Znphocrhius hownrdi, from a .siiecinien in the collection of Hon. F. Springer. 1, fromposterior, x ? ; 2, oral .snrface, *( \; 3, dissection of plates. this may be so in some specimens ; these arm-plates may be comparedwith the arms of Catillocrinidae, but whether they bore further Br isuncertain. The tetramerism of this genus affects the cup only, and was pro-duced by fusion, not by atrophy as was probably the case in Herpetocrinu!^.Family 8. Haplocrixidae. Monocyclica Inadunata, with 5 BB, 5RR, of which 1. ant., r. post, and r. ant. are compound; tegmen composedsolely of 5 0, one being pierced by a pore (? anus + hydropore); 5 arms,unbranched and non-pinnulate, the food-grooves supposed to be subteg-minal. Genus—, Steininger (1837 ; Aplornnus, dOrb. ; seeAV. & Sp., 1886), Devonian, Europe and N. America (Figs. LXIV.); resembles the typi- ^—^r (3ost rant Ant1p> (^ (rp) &&1 cal Heterocrinidae in its cup,the Pisocrinida
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Keywords: ., bookcentury1900, bookdecade1900, bookpublishe, booksubjectzoology
