the Trondhjem Fiord. 357 
46. Lacuna divaricata, Fabr. 
Large at Rédberg, Laminarian zone. 
47. Skenea planorbis, Fabr. 
Rédberg, among weeds. 
48. Rissoa inconspicua, Alder, var. albella, Lovén. 
Laminarian zone, Rédberg. 
49. Rissoa parva, Da Costa, var. interrupta, Adams. 
Laminarian zone, 'Trondhjem. 
50. Alvania Jeffreyst’, Waller. 
Trondhjem and Rédberg, 150-300 fath. 
‘ 51. Alvania cimicoides, Forbes. 
Trondhjem and Rédberg, 150-300 fathoms. 
52. Alvania subsoluta, Aradas,= Alvania abyssicola, G. O. 
Sars, typus (I’orbes and Hanley, varietas). 
250-300 fath., off Rodberg. As it appears to me that 
Jeffreys has introduced great confusion respecting the syno- 
nymy of this shell, it will be well to attempt to clear the 
matter up. ‘This confusion commenced in his paper on 
Mediterranean Mollusca in the ‘Annals’ of 1870, and was 
made worse by his latest views, as expressed in his ‘ Mollusca 
of the ‘Lightning’ and ‘ Porcupine’ Expeditions” (Proc. 
Zool. Soc. 1884, p. 115). 
I will give the synonymy of the species as I now take it 
to be, a list of the specimens in my collection on which my 
conclusions are based, and some notes on the reasons of those 
conclusions. 
1. Alvania Teste (Aradas and Maggiore). 
1844. Rssoa Teste, Ara. & Mage. Cat. rag. Catania, pl. ix. fig. 4. 
1870. Rissow abyssicola, var. conformis, Jeffreys, ‘ Mediterranean Mol- 
lusea,” Ann, & Mag. Nat. Hist. ser. 4, vol. v. 
1880. Rissoa Teste, Monterosato, Bull. Soc. Malac. Ital. vol. vi. p. 68. 
1884, Rissoa Fischeri, Jeffreys, Proc. Zoul. Soc. p. 113, pl. ix. fio. 1. 
1884. Rissoa Teste (partim), id. ibid. p. 115, pl. ix. fig. 4. 
1884. Actonia Teste, Monterosato, Nomencl. gen. e spec. di alcune 
Conchiglie Medit. p. 61. 
Hab. Mediterranean (not North European). 
IT am indebted to the Marchese di Monterosato for ten 
specimens labelled “Alvania Testee=conformis, Palermo.” 
These, from their more numerous ribs and the peculiar shoul- 
dering (above and below) of the volutions, agree more closely 
with Jeftreys’s figures of R. Mischert than with those he gives 
Ann. & Mag. N. Hist. Ser. 6. Vol. xii. Pal 
