Oiipressocrinus townseudi Kom't/, s^). oU'J 



fioiii wliicli tlic mcasuremeuts of d^ arc taken *, whether in 

 cou-sequence of" sliiftiiig or by natural ji;ro\vtli, the uiediau 

 dorsal region of the suture is more proximal than are its 

 ventral ends, and this p;ives the suture that angular ajjpear- 

 ance which was emphasized by Kouig in his figure and 

 description. Any real divergence from the straight line 

 that there may be consists, as in C. elonyutus, in a dorsal 

 saddle (?. f. directed distalwards) with adjacent side lobes; 

 but these appearances arc much fainter than in C. elonyatits. 



The colour is bhack, as in V. einujalus, indicating a large 

 proportion of organic matter in the stcreom. 



The cover-plates have been exposed in a vertical section 

 made through the wIkjIc fossil, and appear to have been 

 about 4^ to the brachial, at all events at about V>\\, which 

 lias a length of 6*3 mm. ; the diameter of each cover-plate at 

 this level would thus be 1'4 mm. Dark spots in the verti- 

 cally cut brachials probably represent nerve-canals from the 

 axial canal to the cover-plates. 



The articularia are ab^ent from one half of the cut fossil, 

 and have been ground down in the other half, so that they 

 are there represented only by narrow and thin bands of 

 stcreom. The proximal articular face of Br2 is fairly well 

 shown in one arm of the other half (fig. 2). The width at 

 the fulcral ridge is 25*5 mm. Immediately dorsal to this 

 ridge is a long narrow groove (presumably for the dorsal 

 ligament), and this gives the impression that the fulcral 

 ridge itself is grooved. Immediately ventral to the ridge 

 is a wide elliptical canal, 3'8 mm. x circa 2 mm. This has a 

 raised margin, outside which on each side is a triangular 

 area (possibly for the interartieular ligament), depressed 

 near the canal, but shallowing towards its apex near the 

 outer end of the fulcral ridge. Ventral to this triangular 

 area is another concave area, with a general slojjc distal- 

 Avards ; its outline appears to have been triangular. This 

 last area lies over the muscle-plates of the "consolidating 

 ajjparatus/'' just as these lie over the corresponding area in 

 the radials ; therefore the area was probably for the attach- 

 ment of the ventral muscles. 



The nearest allies of C. townsendi are without doubt 



* See p. 400. Since the distal brachial of a Cupressocrinus may be 

 anythinp: from Krs to Br ,p, it is convenient for purposes of comparison 

 to designate it di, and tlie penultimate dj, and so on. See, further, a 

 paper recently sent to tiio Geological Society of Ijelgiuui, if it ever 

 appears. 



