1878.] 



MR. A 



H. GARROD ON TOLYPETJTES TRICINCTUS. 



223 



riorly in T. trkinctus by a pair of plates, in front of which, again is 

 another smaller pair. ° ' 



In T conurus the posterior median plate is followed by a single 

 larger plate, and that by a pair of plates the transverse breadth of 

 winch is greater than that of the second median plate behind and 

 n contact with ,t In fig. 1, a and 6 exhibit thesefeatures, as well 

 as their effect in causing the characteristic difference in the general 

 shape of the cephalic shield of the two species-that in T. tririncZ 

 being triangular, with its greatest breadth opposite the posterior of 

 he pairs of plates that in T. conurus being oval, with its grea tes 

 breadth opposite the single pair of plates. g 



Fig. 1. 

 b 



a. T. tricinctus. 



c. T. muriei. 



b. T. conurus. 

 Cephalic shields of Tolypeuies. 



On referring to the beautiful illustrations given by Dr Murie of 

 the animal dissected by him 1 , the cephalic shield of which is here re- 

 produced in outline (fig. 1, c ), it is evident that it does not corre- 

 spond with either of those above described ; and I may mention that 

 i Here is a skin in the national collection (Brit. Mus. spec 140 a) 

 which agrees with it. In these the posterior median plate is followed 

 by a second larger median plate, as in T. conurus, and that, more 

 forward, by a small median plate in association with two small lateral 

 plates. The difference makes me feel justified in establishing a third 

 species of lolypeutes, based upon Dr. Murie's figure, together with 

 tne skin in the national collection above referred to, for which I 

 would suggest the name Tolypeutes muriei, after the author who has 

 1 Tra.is. Linn. Soc. yoi. xxx. pi. xxxi. fig. 3. 



