LISSOTHURIA — PAWSON 



15 



Sole deposits are large plates with conspicuous knobs, which become 

 multilayered with growth (fig. 5f) ; plates approximately circular, 

 massive, of average diameter 0.14 mm. Smaller plates with indented, 

 knobbed margins and occasionally small knobs elsewhere also present; 

 plates with few large perforations, generally 4 central perforations 



, 0-1 mm p 



Figure 5. — Lissothuria deichmannae, new species: a, hourglass-shaped deposits from dorsal 

 body wall; b, smaller rods and plates from tentacles; c, larger plates from tentacles; d, 

 smaller knobbed plates from sole; e, plates from dorsal body wall; f, larger 2-layered 

 knobbed plate from sole; g, deposits from ventral tube feet. 



larger. Average length of small plates 0.1 mm (fig. 5d). Overlying 

 plates are small numbers of hourglass-shaped deposits similar to those 

 of dorsal surface, but even more variable in shape. 



Tentacle stems and digits with larger plates up to 0.30 mm in 

 length (fig. 5c) and smaller rods and plates up to 0.1 mm in length 



