366 CHAS. CHILTON. 



mens of a Crustacean which he felt convinced belonged to 

 the genus Phreatoicus, and he very kindly offered to hand 

 over the specimens to me for examination. In liis paper 

 describing the fossil insects, (1916, p. II), 1 he had mentioned 

 the fossil Crustacean as "a fine Peracarid Crustacean," 

 and in his MS. he had given it the provisional name of 

 Phreatoicus wianamattensis. 



I received the specimens on June 16th, and a careful 

 examination soon convinced me that Mr. Tillyard was per- 

 fectly correct in his identification, and that the specimens 

 all belonged to a single species of Phreatoicus closely 

 similar to existing Australian species, such as P. australis 

 Ohilton and P. shephardi Sayce. None of the specimens 

 is complete, and the head and first peraeopods are not 

 clearly represented in any of them, but several of the other 

 peraeopods are very distinct in some of the specimens and 

 so are the segments of the peraeon (with the exception of 

 the first) and of the pleon. The downward prolongation of 

 the segments of the pleon, which is so distinctive a char- 

 acter of Phreatoicus, is quite evident in most of the speci- 

 mens, and the conical terminal segment is clearly shown 

 in one. These points, with the evidence afforded by the 

 peraeopods, some of which are very perfectly preserved, 

 leave no doubt as to the correctness of the identification. 



The stratigraphical features relating to the Wianamatta 

 Shales are given by Mr. B. Dunstan, Chief Government 

 Geologist of Queensland, in the introduction to Mr. Tillyard's 

 paper, and he concludes his remarks by stating that — 



" The shales containing the fossil remains — insects, fishes, laby- 

 rinthodonts, coprolitic fragments and plants — belong to the 

 Wianamatta Shales, a series probably equivalent to the Upper 

 Clarence Series in Northern New South Wales, and the Darling 



1 The references are given by the year of publication to the list at the 

 end of this paper. 



