NOTES AND EXHIBITS. 437 



in this way in the bottom of the nest to the bird having deposited 

 it before the nest of the Malurus was finished, but on referring 

 to my notes I find that it is only at the bottom and in the lining 

 of the nests of this species the cuckoo's eggs were inclosed. In a 

 similar position in the remains of a nest of Malurus cyaneus Dr. 

 Hurst has also recorded before this Society finding the egg of 

 Cacomantis insperatus. I now believe it to be a protective habit 

 developing in this species against hatching the egg and rearing 

 the intruder as advanced by Messrs. Sclater and Hudson in a 

 parallel instance in their work on "Argentine Ornithology," 

 where Sisopygis icterophrys, a common tyrant-bird in Buenos 

 Ayres, frequently has recourse to the same expedient when the 

 Argentine Cow-bird, Molothrus bonariensisj deposits its eggs in the 

 nest of the tyrant-bird before the owner has begun to lay." 



Mr. Mitchell, of Narellan, contributed the following Note on 

 the Occurrence of certain Fossils from unrecorded Localities : — 



^^ Lepidodendron : Among some specimens sent to me by my 

 friend Mr. Engelhardt is a small fragment that appears to me 

 either to be a portion of a Lepidostrohus or of the stem of Halonia. 

 The scars in character resemble L. goldenbergii, but in size 

 approach those of H. tortuosa. 



Log. — Stockyard Mountain (Engelhardt). 



"Associated with the Glenlee fossils previously recorded are scales 

 which bear a very strong resemblance to those of Lepidostrohus 

 and Sigillariostrohus. In form and structure they are nearer to 

 those of L. ornaius, Lindl. et Hut., than any others I have been 

 able to compare them with. Some, however, are not unlike 

 Lepidophloios lepidophyllifolius, Gold. Again, in their expanded 

 bases, central rib, and tapering apices they have affinities with 

 Sigillariosti'ohus. The determination as scales of either of the 

 above-mentioned genera would be of very great interest, and I 

 record the occurrence of these scales and refer them hesitatingly, 

 though with good reason, to one or other of the genera mentioned, 

 to draw the attention of other interested workers to them. 



