CHAP. II.] FROM PORTSMOUTH TO TENERIFFE. 147 
Fia. 33.—Phormosoma uranus, WyvitLtE Tuomson. Natural size. (No. 6.) 
Lews, in having the calcareous pavement of the perisom con- 
tinuous, no membranous spaces being left between the plates, 
Fta. 34.—Phormosoma wranus, Wyv1LLE Tuomson. Apical surface. Natural size. (No. 6.) 
