221 



appears that I should have left it in its former place with Gastro- 

 chcena and have removed the Panopcea Norveyica to it. The shell 

 differs from Panopcea iu having the pallial line broken up or divided 

 into a number of separate spots, and the animal has very long taper- 

 ing gills, prolonged far into the branchial siphon. 



9. Panopcea middendorffii, A. Adams. Zool. Proc. for 18.i4, 

 p. 137. Arctic Seas. (Haslar Museum.) Appears to be a variety 

 of P. Norvegica. 



The Geographical Distribution of the genus Panopcea affords an 

 illustration of the rule, or " law," so earnestly investigated by the 

 late Prof. E. Forbes, — that the range of genera, as well as of species, 

 depends in great measure on their geological antiquity ; and that 

 when the members of a group are scattered over the greater part of 

 the world, we may expect to find evidence of their existence in the 

 intervening spaces during a former age. M. D'Orbigny describes 

 139 extinct species of Panopcea, commencing in the Permian age, 

 and occurring iu every part of the world where secondary or tertiary 

 strata have been found. 



7. Descriptions of Twenty-five new species of Shells from 



the Collection of Hugh Cuming, Esq. 



By Arthur Adams, F.L.S., &c. 



1 . Tudicla armigera, A. Adams. T. testa turbinato-fusiformi, 

 epidermide fulvicante induta, spira obtusiuscula, apice mamillato ; 

 anfractibus plants, in medio serie spinarum ornatis, spinis tubu- 

 losis, regularibus, subrecurvatis, liris transversis, elevatis, squa- 

 mulis, aculeatis instructis, et interstitiis lineis elevatis simplicibus ; 

 anfractu ultimo serie secundo spinarum ad partem anticam ornato ; 

 apertura ovali, intus alba, columella triplicata, canali recto pro- 

 ducto ; labro intus lirato. 



Hab. Moreton Bay {Mr. Strange). Mus. Cuming. 

 This species is at once distinguished from the other known ex- 

 amples of Tudicla on account of the spiny armature of the whorls. 



2. Fusus spiralis, A. Adams. F. testa fusiformi, tenui, albida, 

 spira elevata, anfractibus spiralibus, convexis, ad suturas con- 

 tractis, transversim liratis, in medio angulatis, carina tuberculata 

 et carina altera infima subsimplice instructis; apertura ovali, 

 labio intus Icevi ; labro intus sulcato, canali elongato, recto. 



Hab. New Zealand. Mus. Cuming. 



This is a beautiful and elegant spiral shell, very strongly reminding 

 one of the young of some unknown species of Gladius (Rostellaria) 

 with the whorls spiral, and where the outer lip is undeveloped. 



3. Fusus dilectus, A. Adams. F. testa fusiformi, subventri- 

 cosa, spira mediocri ; fulvicante, strigis irregularibus, fuscis 

 longitudinalibus picta ; anfractibus ad octo, convexiusculis, supre- 

 mis costato-plicatis, liris elevatis, transversis, crenulatis, majori- 

 bus cum minoribus alternantibus , interstitiis longitudinaliter crebre 



