212 On some B?'itish Polyzon. 



embracing an upright growing Serpula was dredged by the 

 * Porcupine' in 1869. The station was not preserved, but a 

 box contained a Large number of stones the numerous species 

 encrusting which were, with the one exception ot" this 

 CeUepora, identical with the deep-sea fauna of Polyzoa with 

 which I am so familiar in the Shetland seas ; and there can 

 be little doubt but that the species was taken within the 

 British area. The species along with it were Amphihlestruru 

 tnfoliuvij Escharina Dutertrei, Ramphonotus minax^ Mega- 

 pora ringensj Anarthropora mo7iodo7i; " ScliizoporelW ansatn, 

 Aldertj and sinuosa ; PoreJla hella ; Escharella ahyssicola, 

 laqueata, and microstoma ; Ilemicydopora polita, &c. 



EXPLANATION OF PLATE IX. 



Fig. 1. Micropora impressa, Moll : a living zooecium. 



Fig. 2. Ditto : a dead zooecium. 



F/g. 3. Ditto : operculum. 



Fig. 4. Shell of Ditnipa arietina (Miiller). 



Fig. 5. Segment of this shell magnihed, to show the perforations of 



Terehripora lUtrupcs. 

 Fig. 6. Terehripora ditrupce. sp. n. : upper portion of a zooecium. 

 Fig. 7. Ditto : oral aperture of zooicium. 



Fig. 8. Escharina Dutertrei, Audouin, the deep-water Shetland form. 

 Fig. 9. Ditto, its operculum. 



Fig. 10. Ditto : variety taken in company with the last. 

 Fig. 11. Ditto: ditto, its opercula. 

 Fig. 12. Ditto ; oral opening of a specimen from the Antrim coast. 



