BRACHYPODELLA NIDICOSTATA nov. sp. FROM 

 VENEZUELA. 



By GEO. C. S PENCE. 



(Rend before the Society, September lolh, 1910). 



Brachypodella nidicostata nov. sp. 



Shell dextral, cylindric or swollen in the middle, the upper third 

 tapering to a narrow truncation. Surface golden brown with a 

 slightly silken lustre and very delicately ribbed or waved between 

 elevated, sickle-shaped, snow-white hollow ribs, which are convex 

 on the right and concave on the left side when entire, but are 

 usually broken and showing the ground colour between the laminae 

 forming the rib. Whorls remaining vary from eleven to thirteen, 

 convex, with a sulcus above the deeply impressed suture. Last 

 whorl strongly keeled, descending in a moderately long neck, 

 .swollen on the outer side and encircled with white ribs or laminte, 

 becoming more crowded at the back of the expanded mouth. 

 Aperture obliquely ovate, angled at the base and outer anterior 

 portion. Peristome broadly expanded, l^rown, fading to white on 

 the expanded portion. Axis slightly twisted and encircled with a 

 single smooth strong spiral lamella. 



Size (type) i6 mm. x 3 mm., thirteen whorls remaining. 

 Habitat, Chichirivichi, Venezuela. 

 I am indebted to Mr. F. G. Percival, B.Sc, F.G.S., for these 



shells, which he collected in May, 1910, from a verticallimestone cliff. 

 The specific name is suggested by the resemblance of the white 



ribs, when perfect, to the edible nests of the swift {Collocaiia liju/ii 



Horsfield) from Borneo. 



Type in my collection. Co-types in Natural History Museum, 



South Kensington, and Manchester Museum. 



This is erroneously recorded as Brachypodella leucopleura in the 



Proceedings of June iSth Meeting. 



Correction. — In my Obituary Notice of the late Canon Norman, F. R.S., I 

 mentioned that his collections had been "generously bestowed by him upon the 

 nation." I am indebted to Mr. G. C. Robson, of the British Museum (Natural 

 History) for explaininjr the exact facts of the case, viz., that these collections, num- 

 bering altogether over fifty thousand specimens, were purchased in four instalments 

 by the museum authorities, viz., in 1898, 1900, 1910, and 1911-12 respectively, a 

 large sum being paid. Mr. Robson adds, that it would be diflicult to give an exact 

 account of the Canon's donations, but they would appear to be small in proportion 

 to the purchases. — J. C. Melviij,. 



