A treatise on zoology . XXV. & XXVI. Schizocystis armatus (fromBrit. Mus., E75S9 & E7590).X 2. XXV. from above;XXVI. from the abanal «.side. As, anus ; Jir, facets **for bracliioles ; fp, flooringplates of subvective groove ;in Fig. XXVI. the impressionsof these are seen in the distalpart of the groove ; Eh, thepectinirhonib of plates 14 &15 ; St, part of XXVI. Fio. XXVII. Analysis of Schizocystis. Plates 11 & 13are notched by the food-grooves. Plate 23 isdouble, and bears hydropore and gonopore. plates, bears about five brachioles ; a similar extension of r. post,groove to pl
A treatise on zoology . XXV. & XXVI. Schizocystis armatus (fromBrit. Mus., E75S9 & E7590).X 2. XXV. from above;XXVI. from the abanal «.side. As, anus ; Jir, facets **for bracliioles ; fp, flooringplates of subvective groove ;in Fig. XXVI. the impressionsof these are seen in the distalpart of the groove ; Eh, thepectinirhonib of plates 14 &15 ; St, part of XXVI. Fio. XXVII. Analysis of Schizocystis. Plates 11 & 13are notched by the food-grooves. Plate 23 isdouble, and bears hydropore and gonopore. plates, bears about five brachioles ; a similar extension of r. post,groove to plate 13 is checked by anus, and bears only three 2, Callocystinae, starts from a form in which all five sub-vective grooves, with the usual flooring plates and brachioles, pass overthe theca, as in Lepadocystis ; and diverges (a) by suppression of grooves,without branching, into Le^jadocrinus and Pseudocrinus ; (6) by branchingof grooves, with subsequent suppression, into Callocystis, ^phaerocystis^ andStrobilocystis; pectinirhombs 1 &5, 14 & 15, 12& 18 probably alwayspresent. Genera — Lejxi- @ © Q. docystis, P. H. Carpenter(1891 ; syn. Aleekocystis,Jaekel, 1899), Ordovician,Indiana (Fig. XXVIIL).Theca ovoid; plates aroundanus slightly altered fromthe archetypal on 1 & 5,12 & 18, 14 & 15, a
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