684 



INDEX. 



Turtles, with their carapaces perfo- 

 rated by Chelonobia, 391. 

 with Platylepas attached, 427. 



Unisexuality of cirripedes, 23. 



Vagina or sheath, 38, 48. 

 Valves, opercular, 50. 

 of shell, 39, 43. 

 primordial, 129. 

 homologies of, 131. 

 Van de Hoeven on Limulus, 88, 90. 

 Variation of characters, 155, 184, 197. 



in Tetraclita, 327. 



in Chthamalus, 459. 

 Verrucidae, family of, 495. 

 Verruca, genus, 496. 



cancri Aiiericani, 



laevigata, 520. 



nexa, 522. 



prisca, 525. 



Spengleri, 521. 



Stromia. 518. 



396. 



Verruca testadinaria, 392. 



Vesicle, acoustic, 95. 



Vesicular scminales, 98. 



Vesicula seminalis, compound in Pro- 



teolepas, 598. 

 Vision of cirripedes, 94. 



Wagner, E,., on the reproductive sys- 

 tem of cirripedes, 97, 99. 

 Walls of shell, 43. 



Water, brackish, effects of, on cirri- 

 pedes, 163. 

 Whales' skin, growth of, into the shells 

 of Coronula, 413. 

 perforated bv Tubici- 

 nella, 436. " 



Xenobalanus, genus, 438. 



globicipitis, 440. 



Zenker on the eyes of Daphnidae, 



121. 

 Zoosperms, 98. 



V* 



J. E. AIM.ARU, PKIMKK, B A KTHO LOM VAX CLOSE. 



