490 



INDEX 



Turbinidae, 325, 363. 

 Turbo, 325, 363. 



T. castaneus, 325, 363. 



T. castaneus, var. crenu- 



latus, 325, 363. 

 Tyrian purple, 386. 



u 



Uca, 241, 282. 



U. minax, 241, 282. 



U. pugilator, 241, 282. 



U. pugnax, 241, 282. 

 Udotea, 51, 58. 



U. conglutinata, 51, 58. 



U. flabellata, 51, 58. 

 Udoteaceae, 51, 58. 

 Ulothrix, 51, 53. 

 Ulva, 26, 28, 29, 51, 55. 



U. lactuca, 51, 55. 



U. latissima, 51, 55. 



U. Linza, 56. 



U. rigida, 55. 

 Ulvaceae, 28, 51, 52, 53, 54. 

 Umbilicus, 304, 344. 

 Umbo, 304, 417. 

 Uncini, 180. 



Univalves, 306, 307, 314. 

 Urochorda, 472, 474. 

 Urosalpinx, 11, 326, 383, 434. 



U. cinerea, 314, 326, 383. 

 Uses of algse, 37. 



Valoniaceae, 51, 56. 

 Valve, 409, 416. - 

 Varices, 304, 344, 347. 

 Vegetative reproduction, 27. 



zirpnaea, 407, 4*- 



Z. crispata, 407, 461. 

 Zoantharia, 141, 142. 

 Zoarium, 190, 192. 

 Zoea, 248, 263, 2W. 

 Walking crabs, 241. Zooecium, 190, 192. 



Water-vascular system, 201, Zonaria, 63, 70. 

 om -^ OQI z . lobata, 63, 70. 



Zob'ids, 118, 119. 

 Zoophytes, 113, 119. 

 Zostera marina, 12. 

 Zygodactyla, 128. 

 Z. groenlandica, 116, 128 



w 



202, 206, 231. 

 West Indian division, 24. 

 Wharves and bridges, 13. 

 Whelks, 44. 

 Whorl, 304, 343. 

 Whorls, nepionic, 344. 



