ZOOLOGY OP FERNANDO NORONHA. 



603 



when viewed from above. It was very plentiful in the lake on 

 the south-west corner of the island. 



List of Species obtained at Fernando Noronha by the 

 ' Challenger ' Expedition. 



For the above species, see the Eeports on the G-asteropoda, 

 Polyplacophora and Lamellibranchiata, by R. B. Watson, A. C. 

 Haddon, and E. A. Smith respectively. 



EXPLANATION OF PLATE ICXX. 



Fig. 1. Triton Bidlcyi, sp. n. 



2. Littorina trochiformis, var. 

 3, 3 a. Acmma noronhensis, sp. n. 

 4-4 b. Siphonaria picta, var. 



5. Chiton {Ischnochiton) carribceorum. 

 5 a. Ditto. Central Talve, magnified. 

 6, 6 a. Area (Acar) Adamsii. 



7-7 c. Helix {Ophiogyra'i) quinquelirata. 7 c. Aperture, enlarged; lip 

 broken away to show the teeth. 



8. Bulimics {Tomigcrus) Bamagei, sp. n. 



9. „ {Btdimulus) Bidleyi, sp. n. 



10. Fupa solitaria, sp. n. 10 a. Aperture, enlarged. 

 11-11 b. Planorbis noronhensis, sp. n. 



Acmaea, sp. 



Littorina nodulosa, d'Orb. 

 Nerita ascensionis, Gmelin. 

 Cerithiopsis, sp. 

 Columbella raercatoria. Linn. 

 Cylichna noronyensis, Watson . 

 Fossarus ambiguus (Linn.). 

 Marginella sagittata. Hinds. 

 Mitrularia uncinata (Rve.). 

 Nassa capillaris, Watson, 

 Oliva fulgida, Reeve. 



pulchella (?), Duclos. 



Phasianella, sp. 

 Rissoa, sp. 



Watson. 

 Solarium, sp. 



Stomatella nigra, Quoy 8f G. 

 Utriculus canaUculatus {Say). 

 Xenophora corrugata (Reeve). 

 Chiton Boogii, Haddon. 

 Pectunculus pectinatns (Gmelin). 

 Ervilia subcancellata, Smith. 

 Cardium medium, Linne, 

 Lucina pecten, Lamarck. 

 Mytilus exustus, Bve. 

 Area imbricata, Brug. 

 Peeten noronhensis. Smith. 



Scalaria hellenica, Forbes. 

 Siphonodentalium tetraschistum. 



