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Euplectella aspergillum, Owen, . . . 64 



Fig. 1. A specimen of Euplectella aspergillum, Owen, preserved in alcohol, with 

 the soft parts ; represented in natural size, showing an S-shaped 

 curvature, moderately developed external ridges, and slight ledge 

 surrounding the convex terminal sieve-plate. Obtained near Zebu, 

 Philippine Islands, at a depth of 100 fathoms. 



Fig. 2. A specimen of Euplectella aspergillum, Owen, preserved in alcohol, with 

 the soft parts ; represented in natural size, showing simple hook- 

 shaped curvature, high irregular external ridges, and strongly deve- 

 loped ledge surrounding the terminal sieve-plate. Obtained near 

 Zebu, Philippine Islands, at a depth of 95 fathoms. 



This plate was executed under Sir WyviUe Thomson's direction. 



