28 Mr. A.. Adams o?i two new species of the genus Brownia. 



latiore ; anteimis pedibusque testaceis, illis apice fuscis, capite 

 paulo longioribus ; thorace capite paulo longiore ; abdomine ellip- 

 tico, thorace latiore et paulo longiore; alis subfuscis. — Long. 

 Corp. If, alar. 2\ lin. 



Inhabits Madeira proper, principally at intermediate altitudes ; 

 — Santa Anna, Ribeiro Frio, &c. 



Bethylus tenuis. 



B. mas niger ; capite oblongo, parce punctato, thorace vix latiore 

 sed multo breviore ; anteimis testaceis, apice fuscis, capite lon- 

 gioribus ; abdomine longi-elliptico, thorace latiore et paulo lon- 

 giore ; pedibus testaceis, femoribus partim piceis ; alis anticis 

 subrufescentibus. — Long. corp. li-^, alar, l^-lf lin. 

 Inhabits the Northern Dezerta, or Ilheo Chao, on which I 



captured it abundantly early in June 1850, and at the end of 



May 1855. 



[To be continued.] 



III. — Notice of two new species of Brownia, a genus of Oceanic 

 Mollu^ca. By Arthur Adams, F.L.S. 



Hong Kong, Oct. 1, 1857. 

 On the 4th of July, steady breeze and fine weather, while cross- 

 ing the China Sea, 1 was fortunate enough to take in the towing- 

 net two new species of the genus Brownia of D'Orbigny. The 

 typical species B. Candei is described as "lateraliter carinato- 

 crenulata,^^ and is probably the same as the Echinospira diaphana 

 of Krohn, the Calcarella spinosa of Souleyet, and the Jasonilla 

 M^Leayiana of Macdonald, all of which have the three salient 

 angles of the whorls armed with short spines. In the species 

 here described the whorls are unarmed, being carinated in one 

 and angulated in the other. The forms described by Krohn, 

 Souleyet, D^Orbigny, and Macdonald, may, however, be all 

 distinct, forming a spinose section of the genus. Unfortunately 

 the shells of my two species were found empty, with the excep- 

 tion of a transparent fragment in one individual of B. carinata^ 

 an examination of which, in conjunction with the form of the shell 

 of these new species, has led me to infer, with M. D'Orbigny, 

 that the animal is a Heteropod belonging to the family Atlan- 

 tida, and not to the Macgillivrayidce, where my brother and 

 myself have placed the genus Calcarella of M. Souleyet. The 

 shells are so perfectly diaphanous, that they are invisible in 

 water, and were only detected by their adhering to the tongue 

 of red bunting of the towiug-net. D'Orbigny describes his 

 Brownia as a section of the genus Helicophlegrna ^ which is the 

 same as the Oxy gyrus of Benson and the Ladas of Cantraine. 



