APPENDIX MOLLUSCA. 561 



PTKBOSOMA PLANA, Lesson. 



Hedley, Proc. Malac. Soc., i., 1895, p. 333; Crosse, Journ. de 

 Conch., xliv., 1896 (1897), pp. 207 -212. 



An imperfect shell from a depth of 200 fathoms off Tutaga Islet, 

 is with doubt so identified. Since writing the article above quoted 

 I have found that Fischer's reason for classing this as a Nemertine 

 was a mistaken identification by the Naturalists of the "Chal- 

 lenger."* 



ATLANTA GIBBOSA, Eydoux and Souleyet. 



Eydoux and Souleyet, Voy. Bonite, Zool., ii., 1841, p. 386, p). xxi., 

 figs. 1 - 8. 



Dead shells were dredged off Tutaga, in 45-52 and 200 

 fathoms. This species does not seem to have been recorded from 

 the Pacific. 



ATLANTA TURRICULATA, D'Orbigny. 



Eydoux and Souleyet, loc. cit., p. 391, pi. xxi., figs. 30-35. 

 Dredged off Tutaga Islet in 45 - 52 and 200 fathoms. 



ATLANTA GUIDICHAUDII, Eydoux and Souleyet. 

 Eydoux and Souleyet, loc. cit., p. 397, pi. xix., figs. 29 - 34. 

 Several dead shells dredged in 200 fathoms off Tutaga Islet. 



TORNATINA LEPTEKES, Watson. 



Pilsbry, Man. Conch., xv., 1893, p. 200, pi. xxiv., figs. 29, 30. 



Dredged in 36 fathoms north of Pava Islet, and off Tutaga in 

 45-52 and 200 fathoms. 



Previously taken oft' Raine Island, Queensland, by the 



" Challenger," 



RlNGICULA, sp. 



A small Ringicula was dredged in 45 - 52 fathoms off Tutaga 

 Islet. It corresponds exactly to specimens from Torres Straits, 

 which I have identified as P. pusilla, Watson, and differs very 

 little from my JR. parvula. It may be here pointed out that the 

 illustration of R. pusilla,j appears to represent a young and 

 broken shell, and that the description conveys a totally different 

 idea of the species. 



* Moseley Ann. Mag. Nat. Hist., (4) xvi., 1875, p. 382. 

 t Watson Chall. Eep., Zool., xv., 1886, pi. xlvii., fig. 9. 

 MX 



