490 
Turbinide, 325, 362. 
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. 
Udoteacez, 51, 58. 
Ulothrix, 51, 53. 
Ulva, 26, 28, 29, 61, 55. 
U. lactuca, 51, 55. 
U. latissima, 51, 55. 
U. Linza, 56. 
U. rigida, 55. 
Ulvacez, 28, 51, 52, 53, 54. 
Umbilicus, 304, 344. 
Umbo, 304, 417. 
Uneini, 180. 
Univalves, 306, 307, 314. 
Urochorda, 472, 474. 
Urosalpinx, 11, 326, 383, 434. 
U. cinerea, 314, 326, 383. 
Uses of algae, 37. 
Vv 
Valoniacee, 51, 56. 
Valve, 409, 416. 
Varices, 304, 344, 347. 
Vegetative reproduction, 27. 
INDEX 
Vellela, 131. 
V. limbosa, 117, 131. 
Velum, 134. 
Velutina, 309. 
Velvet sponge, 104. 
Veneride, 406, 447. 
Venous sinuses, 247. 
Ventral surface, 201. 
Ventricosa, 304. 
Venus, 406, 410, 448. 
V. cancellata, 406, 449. 
V. mercenaria, 406, 448. 
V. mercenaria, var. mor- 
toni, 406, 449. y 
Venus’s flower-basket, 102. 
Girdle, 157. 
Vermes, 163. 
Vermetide, 326, 375. 
Vermicularia, 326, 375. 
V. spirata, 326, 375. 
Vertebrates, 19. 
Vesicularia, 189, 198. 
V. custata, 189, 198. 
V. dichotoma, 189, 198. 
Vibracula, 190, 193. 
Visceral mass, 415. 
Voluta, 313, 327, 398. 
V. junonia, 327, 398, 399. 
Volutidae, 327, 398. 
Vulgar names, 29. 
WwW 
Walking crabs, 241. 
Water-vascular system, 
202, 206, 231. 
West Indian division, 24. 
Wharves and bridges, 13. 
Whelks, 44. 
Whorl, 304, 343. 
Whorls, nepionic, 344. 
201, 
Worms, 159, 163. 
Bristle-, 171. 
Cheetopod, 172. 
Clam-, 176. 
Flat-, 164. 
Nemertean, 167, 169. 
Polycheete, 172. 
Polyclad, 165. 
Round-, 170. 
Segmented, 170. 
Tubicolous, 180. 
x 
Xiphosura, 242, 294. 
Xylotrya, 462. 
Y 
Yellow sponge, 104. 
Yoldia, 309, 405, 422. 
Y. limatula, 405, 422. 
Y. sapotilla, 405, 423. 
Y. thracizformis, 405, 422. 
Z 
Zirphza, 407, 461. 
Z.crispata, 407, 461. 
Zoantharia, 141, 142. 
Zoarium, 190, 192. 
Zoéa, 248, 263, 273. 
Zocecinm, 190, 192. 
Zonaria, 63, 70. 
Z. lobata, 63, 70. 
Zodids, 118, 119. 
Zoophytes, 113, 119. 
Zostera marina, 12. 
Zygodactyla, 128. 
Z. groenlandica, 116, 128. 
