70 Zoological Society. 



dispositis ; dentibus parvis acutis ; impressionibus musculari- 

 bus subdistantibus, impressione pallii sinu magno ; ligamento 

 externa elongato. 

 This genus differs from Solenella, not only in its Leda-like form, 

 but in the hinge-margin having as many teeth anteriorly as poste- 

 riorly. In Solenella the series of teeth is confined to the fulcrum to 

 which the external ligament is attached ; — in this genus the teeth ex- 

 tend along the entire hinge-margin. 



Neilo Cumingit, A. Adams. N. testa transversa, cequivalvi, 

 incequilaterali, epidermide tenui viridi-fusco obtecta, trans- 

 verse concentrice sidcata ; latere antico clauso, rotundato, 

 postico longiore, subangulato, hiante, margine truncato flexuoso, 

 superne auriculato. 

 From the circumstance of the hind margin gaping considerably 

 and being divided as if for two siphons, the anal and branchial tubes 

 in this animal are probably distinct and elongated, as in Leda. The 

 genus Neilo, in fact, will represent Leda, of the family Nucididce, in 

 a distinct family, Solenellidce, characterized by the external ligament 

 of the hinge. It is from the shores of New Zealand. 



Concholepas (Coralliobia) fimbriata, A. Adams. C. testa 

 ovata alba, longitudinaliter radiatim costata, transverse la- 

 mellosa, lamellis pulcherrime fimbriatis ; spira minuta, an- 

 fractu ultimo amplo ; apertura ovali, antice attenuata, sub- 

 canaliculata ; labio excavato incurvato, margine externo dila- 

 tato et valde reflexo ; labro acuto, margine late dilatato et 

 eleganter jimbriato. 

 Hab. Cagayan, province of Misamis, island of Mindanao, Philip- 

 pines. On the coral reefs at low water (H. C). Mus. Cuming. 



Externally this curious shell resembles Concholepas, but the ab- 

 sence of the two teeth on the fore part of the outer lip prevents it 

 being strictly referred to that genus. In the character of the inner 

 lip, and in its place of habitation on coral reefs, it approaches Lepto- 

 conchus, and perhaps it has affinities also with Pedicularia. I have 

 thought it best, until the animal is known, to regard it as a sub- 

 genus of Concholepas, under the name of Coralliobia. 



Paxillus minor, A. Adams. P. testa dextrorsa, ovali, tenui, 

 epidermide fusca obtecta ; anfractibus septem, convexis, longi- 

 tudinaliter confertim costellatis vel valde striatis ; apertura 

 suborbiculari, ascendente, antice subproducta ; peristomate 

 duplici, externo reflexo, dilatato ; labio plica dentiformi valida 

 instructo. 



Hab. ? 



I believe the little shell described above to be a dextral species of 

 the genus Paxillus, described by my brother and myself in the 

 ' Annals ' for January, 1 85 1 . We there considered the genus to be- 

 long possibly to AuriculidcE ; but an examination of this species, 

 and a better knowledge of the locality where the shells have been 

 found, lead us to place them amongst the Helicidee. 



Diplommatina Bensoni, A. Adams. D. testa minima vix ri- 



