TRANSACTIONS OF SECTION D. 923 



Famm. Ichthyocrinidce (incl. Tycnosacciis, Leeanocr., Cijrtidocr., Clidoc/iin/x, 

 Mespilocr.). Idiocrinidte, Taxocriiiidm (md. Gnorimoer. [genotype Taxocr. expanms, 

 Aug.], Anisocr. Homalocr.), Dacfylocrinidce (incl. Calpiocr., Lithocr. [genotype 

 Forbesiocr.divar{catus,Ang.'],St/nerocr., JEuryocr., Oiiychocr.), Sagenocrinidcn (incl. 

 ' Forbesiocr.' Ayassizi). Impinnata incertce sedis : Edriocr., Cleiocr., Ehopalocr. 



Grade Finn at a. — BB and RR united by close suture, RR and proximal 

 Br by muscular articulation or syzygy ; pseudomouocyclic ; arms pinnulate and 

 either simple or isotomous ; axial canal separate from ventral groove throughout ; 

 lax is generally IBr^, rarely IBr, ; five present in early stages and sometimes in 

 adult, but usually atrophy ; anals do not form part of the dorsal cup in the adult. 



Famm. Apiocrmidce (incl. Calamocr.), Bourgueticrmida; (incl. Mesocr.Fhizoa\), 

 Atitedofiidee (incl. Thiolliericr., Fudiocr., Fromachocr.), Atelecrmidce, Actino- 

 metridee, Thaumatocrinidce, Euyeniacrinidce, Holopodidce, Eudesicrinidee. 



Order 3. Camerata. — All IBr and usually IIBr incorporated in the dorsal cup 

 by iBr, at first loosely, but afterwards by close suture. IBB always the primitive 

 5. Arms pinnulate. A plate always between right and left posterior RR, resting 

 on posterior B, and followed by others leading up to the anus. Mouth and 

 ambulacra subtegminal. 



Famm. Feteocritiidce (only Feteocr.), Dimerocrinidce (incl. Ftyckocr., OrtJiocr., 

 Hyjftiocr.), Lampterocrinidee (incl. Siphonocr.), Fhodocrinidce. 



Class IV. Edeioasteeoidea. — Theca composed of an indefinite number or 

 irregular plates, some of which are variously differentiated in diflerent genera ; no 

 skeletal appendages ; central mouth, from which there radiate through the theca 

 five unbranched ambulacra, composed of a double series of alternating plates, 

 sometimes supported by an outer series of larger alternating plates. Pores between 

 (not through) the ambulacral elements, or between them and the thecal plates, 

 permitted the passage of extensions fi-om the perradial water-vessels. Anus in 

 posterior interradius, on oral surface, closed by valvular pyramid. Hydropore (F) 

 between mouth and anus. 



Fam. Agelacrinidce. Theca composed mostly of thin plates, flexible, attached 

 temporarily or permanently by the greater part of the aboral surface ; ambulacra 

 confined to oral surface. {Stromatocystis, Cystaster, Hemicystis, Agelaa:, Strept- 

 aster, Lepidodiscns, Haplocystis, Biscocyxtis. Perhaps incl. Cyclocysfoides) . 

 Cyafkocystide^. Theca composed on oral surface of five deltoids surrounded by 

 marginals, but below of a fused solid mass of steveom, which forms a permanent 

 incrusting root. Edrioasteridm. Flexible theca of thin plates ; loosely attached 

 by excavate aboral surface ; ambulacra pass on to aboral surface. (Edvioaster, 

 Dinocystis). 



6. On the Detection of Phosphorus in Tissues. 

 By Professor A. B. Macallum, Ph.D. 



7. Report on the Physiological Effects of Peptone and its Precursors when 

 introduced into the Circulation. — See Reports, p. 720. 



8. Report on Caves in the Malay Peninsula. — See Reports, p. 571. 



9. Report on Nerve-cells. — See Reports, p. 714. 



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