486 



MR. H. N. RIDLEY ON THE 



5. MuREX (Ocinebra) alyeatus, Kiener. 



Hah. Panama {Reeve, Kohelt, Sowerhy) ; West Indies (Tri/on). 



As suggested by Tryou *, I think there must be some mistake 

 with regard to the locality " Panama " which has been assigned 

 to this species first of all by Eeeve and afterwards by otiiers. I 

 have never seen a specimen from that locality, and Mr. G. B. 

 Sowerby informs me that he has frequently received it Avith 

 collections from the West Indies, but never from the Pacific side 

 of Central America. M. erosus, Broderip, M. oheliscus, A. Adams, 

 Triton Cantrainei, Recluz, and probably M. pauperculus, C. B. 

 Adams, are perfectly distinct from the present species and from 

 one another. This is another example of Tryon's rash and indis- 

 criminate " lumping " of species, which detracts so much from 

 whatever value may be attached to his work. 



6. PiSANiA pusio (Linne). 

 Buccinum pusio, Reeve, Con. Icon. fig. 43. 



Hah. Honduras and 8t. Thomas (Coll. Ginning)', Sta. Lucia 

 {d^ Orhigny as Purpura accincta) ; Ascension I. {Qonry). 



The specimens from Fernando Noronha are rather small, and 

 much more distinctly striated than certain examples from the 

 West Indies. 



7. Purpura hjemastoma, Linne. 



The specimens obtained by Mr. Eidley constitute a well-marked 

 variety of this well-known species, both as regards form and 

 colour. They have the spire more elevated in proportion to the 

 length of the aperture, and only the two uppermost of the four 

 series of nodules on the body-whorl are distinct. The interior 

 of the aperture is greenish blue, reddish near the labrum, which 

 is bordered within with black-brown, upon which the fine orange 

 or yellowish lirse are very distinct. The exterior of the shell is 

 purplish black, streaked and spotted with greenish white. 

 P. JicBmastoma is known from the West Indies, West Africa, 

 Mediterranean, Atlantic coasts of France, Spain, and Portugal. 



8. COLUMBELLA MERCATORIA, Linne. 



Hah. St. Vincent, Grenada, Nevis, Cuba, Martinique, and 

 Sta. Lucia {Brit. Mus.) . 



With one exception the eleven Fernando Noronha shells are 



* Man. Conch, vol. ii. p. 



