142 Proceedings of the Fmjcd Physiccd Society. 



Below the dentaiy the inferior margin of the jaw is formed 

 by a series of infrddentcmj plates, while posteriorly the arti- 

 cular region is covered by a plate corresponding in position 

 apparently both with the angidar and siqora-angidar elements. 

 I may add that in one specimen of Bliizodopsis, I have seen 

 very distinct evidence of a splenial. 



The great complexity of the structure of the mandible in 

 these forms and in the allied " Dendrodonts " of the Old Eed 

 Sandstone need not astonish us when we take into account the 

 remarkably segmented splenial of the recent Amict, or the 

 similarly segmented maxilla of Lepidosteus. 



II. On the Occurrence of the Black Redstart (Euticilla tithys) 

 in Stirlingshire. By JoHN A. Haevie-Beown, Esq. 

 (Specimen exhibited.) 



This specimen of Buticilla tithys, the fourth occurrence of 

 the species in Scotland, as far as I am aware (for the three 

 previous records see Mr Gray's " Birds of the West of Scot- 

 land," p. 84), and which was shot at Higginsneuk, in 

 Stirlingshire, opposite Kincardine-on-Forth, by myself, on 

 the 10th November 1875, I took to be an immature female; 

 it is a female by dissection. 



The distinctions between females of this species and those 

 of the common redstart {B. p)hcenicuriis) are not always 

 easily diagnosed, but one distinction pointed out by various 

 authors is, I understand, sufficient to distinguish them in all 

 stages and phases of plumage, viz., in B. pha>MicuTus the tail 

 feathers are uniformly rufous throughout (except at the base), 

 except the two centre feathers, which are brown in both 

 species. In B. tithys, the tips of the tail feathers are 

 brown as in this specimen.* The faintness of the brown in 

 this specimen points to immaturity. The absence of decided 



* Mr Cecil Smith, " Birds of Somersetshire," p. 89, says the femcale black 

 redstart has ' ' the tips of all the tail feathers reddish brown like the two 

 centre feathers." Shelly, " Birds of Egypt," p. 84, says, *' Tail bright rufous 

 tipped with brown." Professor Newton (" Yarrell," fourth edition, p. 338) 

 says, "The outer pair of feathers with the outer web brown." 



