GALEROPSIS. 211 



Aradas and Benoit state that this species, instead of being 

 found at great depths as G. bracteata, is littoral. 



It is usually known as Murex scalaris, Brocchi, but that 

 shell is a fossil and entirely distinct. 



P. SOPHIA, Aradas and Benoit. PI. 66, fig. 381. 



Very rare. Length, 1*5 inch. 



Palermo. 



Distinguished by its ventricose form, numerous ribs, cauda 

 and closed reflexed canal. Monterosato, Kobelt, etc., consider 

 this = Hindsia nivea, Pfr., an exotic shell : they are probably 

 correct ; still I insert the species here. 



P. SPAD^E, Libassi. 



Described as a fossil, but recently found living. I do not know 

 the species. It has been referred to Tritonidea. 



Mediterranean. 



Species of Coralliophila unidentified. 



0. MADREPORINA, A. Ad. = Rhizochilus coralliophila, A. Ad. 



(Philippines), C. SENTICOSA (Bombay), C. CONFRAGOSA (Hab. 

 unknown), C. ASPERRIMA (Hab. ? resembles C. scalariformis , 

 Lam.), C. RETUSA (Hab. unknown), all of H. and A. Adams. 



C. RADULA (China), C. PULCHELLA (Philippines), C. SUTURALIS 

 (Philippines), C. SCALA (Juan Fernandez), C. FRAGTLIS (Philip- 

 pines), C. CLATHRATA (Philippines), all of A. Adams. 



None of these species are figured, and in a genus in which the 

 form and sculpture of the species are so variable, it is very unsafe 

 to endeavor to identify them by descriptions only. Probably 

 most of these names, founded on ideas of the immutability of 

 specific characters which no longer obtain credence, will become 

 synonyms. 



Subgenus Galeropsis, Hupe. 



I venture to place under this name the Bhizochilus madrepo- 

 rarum, Sowb., which possesses differential characters from both 

 Rhizochilus and Goralliophila. The young shell is free, and not 

 unlike a Coralliophila, and in this stage it has a small, thin oper- 

 culum with lateral nucleus. The animal has a short siphon which 



