48 CONTRIBUTIONS TO CANADIAN PALEONTOLOGY. 



Clay beds of interglacial age, Scarboro', Ontario. Three specimens, Nos. 

 14520, 14524, 14525— G. J. Hinde. 



Named in honour of the veteran New York palaeontologist, Prof. James 

 Hall. 



Platyniis dissipatus. 



Platynus disdpalus Scudd., Tert. Ins. N. A., 521, PI. i, fig. 37 (1890). 



This species, which is of the same size as P. halli and agrees with it in 

 its general features and in the minute texture of the surface, is separated 

 from it solely on account of the grosser sculpture of the elytra, since the 

 strise, which are equally broad, are much shallower — a characteristic which 

 applies as well to the punctures — and are less distinct on the sides than 

 on the interior half. Neither of the fragments is perfect, though one has 

 all but a little of the tip and permits us to see that the fifth and sixth 

 strise would unite early, as in those species, did they not fade out altogether 

 before uniting. There is at least one puncture in the third interspace as 

 far from the base as the width of the elytron. 



Breadth of elytron, 1 -S"""- 



Interglacial clay beds of Scarboro', Ontario. Two specimens, Nos. 

 14515, 14563.— G. J. Hinde. 



Platynus desuetus. 



Platynus desuetus Scudd., Tert. Ins. N. A., 521-522, PI. i, figs. 43, 51, 58 (1890). 



This, the largest of the species from the clay beds of Scarboro', is more 

 nearly allied to P. crenistriatui LeC, than to any other living species, 

 agreeing with it also in size, which none of the other fossils do ; but in 

 other particulars, including the intimate texture of the surface, it agrees 

 better with its contemporaries. It is iiearest perhaps to P. halli, but the 

 strise and punctures are a little less pronounced, the insect is much larger, 

 and the fifth and sixth strise meet at no great distance from the tip of 

 the elytron, as in the modern species mentioned. There appear to be three 

 punctures in the third interspace. 



Length of elytron, 5""° ; breadth, 2"""'. 



Clay beds of interglacial times, Soarboro', Ontario. Six specimens, 

 Nos. 14477, 14478, 14486, 14516, 14526, 14538— G. J. Hinde. 



Platynus harttli. 



Platynus harttii Scudd., Tert. Ins. N. A., 522, PI. i, fig. 31 (1890). 



This sjiecies, represented by a couple of specimens only, is the smallest 

 of those found in the interglacial deposits, and in its peculiarities, especi* 



