55 



much in form and in the position of the dorsal fin from the other 

 Siluroids, to be referred to any of the restricted subfamilies. We 

 have therefore placed it in a distinct one, which we believe is truly- 

 founded. 



The characters of the subfamily have been given here, because 

 Noturus, one of the North American genera of Ictaluri has a similar 

 union of the adipose fin and the procurrent rays of the caudal fin. 

 But in every other respect, Noturus is a true member of the group of 

 Ictaluri, and nearly allied to the common catfishes or Amiuri. 



Genus Hept after us Bleeker. 



SYXOXYMY. 



Pimelodus § 3 sp. Cuv. et Val. Hist. Nat. des Poissons, vol. xv. 

 Heptapterus Bleeker, Ichthyologiae Archipelagi Indici Prodromus, 



vol. I. Siluri, p. 197. 

 The only known species is an inhabitant of the Parana River and 

 its tributaries. 



Type Heptapterus mustelinus Bleeker. 

 Syn. Pimelodus mustelinus Cuv. et Val. 



Catalogue of the Mineralogical species Allanite. By 

 Wm. Sharswood. 



In anticipation of prefixing a monograph of the Cerium minerals 

 to my researches on the element Cerium and its congeners, I have pre- 

 pared a reference list of the present known minerals of the species 

 Allanite, accompanied with such notes as may not be altogether 

 without interest to science. An additional object has also been had 

 in view, — that of gaining suggestions and other assistance fromi 

 those persons who may be able to oiFer them. 

 Philadelphia. 



allanite. 

 Allanite. Alluk, Greenland. Thomson, Trans. R. S. Edinburgh,. 

 VI. 371. (It was on this mineral that the variety Allanite was- 

 founded.) 



Schmiedefeld near Luhl, Thuringia. Credener. 



Hindostan. (Thomson alludes to his ha\ing seen a speci- 

 men of this mineral in the Museum of the Honorable East India 

 Company, but failed to learn its exact locality. Dufrenoy gives 

 an analysis of a specimen from the same country, by Stromeyer.) . 



Jotum, Fjeld. Scheerer. 



Myssore. Wollaston. 



Snarum. Scheerer. 



Krux, in Thuringia. Credener, Ann. Chem. u. Phys. Lxxix. 



144. 



