OP CONCHOLOGY. 165 



IT. compressus, Lea (sp. 303), should be II. pressus, Lea. The 

 specimen figured is juvenile. 



II. securis, Lea (sp. 304), is also figured from a young shell. 



II. multiradiatus, Lea (sp. 306), is not that species. What it 

 is, is difficult to tell ; it looks something like luteolus. 



II. affinis, Lea (var. sp. 318), I do not recognize. 



II. Ourreyana, Lea (sp. 319), is a Margaritana. 



II. subglobosus, Lea (sp. 321), is a small example ; the locality- 

 is Bayou Teche. 



II. venustus, Lea (sp. 326), is, I fear, oniy a young ligamenti- 

 nus. 



II. tortuosus, Sowerby (sp. 330), Maryland. Is a very fine 

 II. complanatus. 



II. trirostris, Benson., II. rectelinearis, Sowerby, II. digitifor- 

 mis, Sowb., are described from India. 



II. latissimus, Sowerby. United States of America (sp. 337). 



It is difficult to decide upon this, for the reason that all the 

 descriptions of the Conchologia are vague and unsatisfactory, and 

 omit the most important specific characters. The genus is not 

 understood by conchologists in Europe, — even as restricted to 

 their own native species. It is very improbable that the latissi- 

 mus is new. 



II. Taitianus, Lea (sp. 338), is not that species. 



II. triangularis, Barnes (sp. 340). II. formosus, Lea, is not a 

 variety, but identical, being the female. 



II. sagrinatus, Sowerby (sp. 345), nov. sp. Loc. — ? 



II. purpureus, Say (sp. 346) = complanatus, Solander. 



II. Lazarus, Lea (sp. 348), add to locality " South Carolina." 



II. Hopetownensis, Lea (sp. 349), should read Hopetonensis. 



II. Downiei, Lea (sp. 350), locality should read Hopeton. 

 Anodon (continued). PI. 20. Jan., 1868. 

 Bidla. Plates 1 to 4. Jan., 1868. 



The new species described are — 



B. tenuissima, Sowb.' Swan Riv., Australia. 

 " solida, A. Adams. Hab. — ? 



Mycetopus. PI. i. 



Iridina. Plates 1, 2. January, 1868. 



I. angustata, Sowerby. Africa ? 



