306 L, E. CRAWSHAY. 



CLIONIDAE. 

 Cliona sp. 



Specimens of Cliona, in all cases I believe boring in dead shells of 

 Pecten, Pcduncnlus, Lutraria, etc., were obtained, sometimes very com- 

 monly, at Positions 4, 8, 9, 10, 11, 13, 18, 34, 44, 46, 59. 



Depth, 40-49 fath. 



The specimens were unfortunately not retained for further examin- 

 ation, and the species must therefore be left unnamed. 



POLYMASTIDAE. 



Polymastia robusta, Bowerbank. 



Six specimens were obtained as single examples at the Positions 8, 

 14, 51, 55, 77, 80. 

 Depth, 43-51 fath. 



Particulars are as follows, the measurements being made after pre- 

 servation in spirit : — 



At Position 8. Form, depressed hemispheroidal, with fistular pro- 

 cesses very numerous. Measurement, 55 x 50 x 

 about 30 mm. in height. On a flat stone. 

 Depth, 43 fath. 

 „ 14. (Specimen not retained.) 



„ 51. Form tending to bulb-shaped, with surface very 

 even, and most of the fistular processes fusing 

 together as one combined outgrowth from the 

 upper surface. Measurement, 35x28x35 mm. 

 in height. Depth, 43 fath. 

 „ 55. Fistular processes numerous. Measurement, 50 x 



40 x 35 mm. in height. Broken from base. 

 „ 77. Fistular processes numerous. Measurement, 95 x 



75 X 50 mm. in height. Depth, 49 fath. 

 „ 80. Fragment, torn from an apparently large specimen. 

 Depth, 51 fath. 



Polymastia mammillaris (0. F. Miiller). 



At Position 51. One specimen; forming an investing growth on 

 dead Pecten valve, with about a dozen processes. 

 Extent, 23 x 12 mm. Depth, 43 fath. 



