440 



scribe ; but I should not be in the least surprised if the genera Mac- 

 Andrewia, Myliusia, and Bacti/localyos should all prove to be a 

 peculiar family of zoophytes rather than sponges. If these bodies 

 are sponges, they will form a family in that group, which may be 

 named MacAndrewiadcB, characterized by the peculiar form and 

 structure of the axis, the distinctness of the bark, and the position 

 of the oscules or cells. 



The structure of the base of Dactyl ocalyx and of the spicula which 

 are found in the interspaces of the network are figured by Mr. 

 Quekett in his ' Lecture on Histology.' 



I have named this genus after Christlob Mylius, who first de- 

 scribed the curious zoophyte since called Umbellidaria grcenlandica ; 

 and I think that any one who reads his simple and plain account 

 of the animal in his letter to Haller, and the account of the same 

 animal given by John Ellis in his work on Corallines, will be satisfied 

 that the latter was not very liberal in his praise towards his contem- 

 porary. There might have been reasons why he did not mention 

 the name of Mylius, but I cannot conceive why those of Coliinson 

 and Dunze should have been omitted. 



It is much to be regretted that nothing is known as to what became 

 of the two specimens of this animal described by Mylius and Ellis, 

 and that no other specimen has been found since that period, now 

 more than a century ago. 



2. On some new or little-known Birds from the Rio Napo. 

 By Philip Lutley Sclater, M.A., Secretary to the 

 Society. 



Among some birds lately received from the Rio Napo, and kindly 

 submitted to my inspection by M. Vjerreaux of Paris, are several spe- 

 cies not included in the series from the same locality which I had 

 the pleasure of bringing before the notice of the Society last year *. 

 To these I now beg leave to call the Society's attention, some of 

 them appearing to be new to science, and others, although already 

 described, to be of rare occurrence. 



1. Basileutertjs nigri-cristatus (Lafr.). — Myiothiolypis ni- 

 gri-crisiata, Bp. Consp. p. 311. 



2. Diglossa aterrima, Lafr. Rev. Zool. 1846. p. 319. 



3. Calliste rufigularis, Sclater, Mon. Call. pi. 13. 



The occurrence of this species on the eastern side of the Andes is 

 certainly singular, as M. Bourcier obtained his specimens at Calacali, 

 on the western side of the great range. 



4. Calliste chrysotis, DuBus ; Sclater, Mon. Call. pi. A'3. 



* See r. Z. S. 185R, p. 59. 



