Miscellaneous. 307 



British Isles, are verj' common in the gulf of Marseilles. Thoy 

 live among the seaweeds of the shore, and even resist the im- 

 pure waters of tlie harbour of Arenc. 



This great googra])hical extension is still more surprising in re- 

 spect of the freshwater Neraatoids. In the pools of La Torse, in the 

 neighbourhood of Aix in Provence, I obtained Dortjlumms star/nalis; 

 Duj., and Trilohus peUucldus, Bast., of the English ponds. Probably 

 M. Villot will find in Brittany most of the species indicated in the 

 Mediterranean. The imperfection of some of Bastian's figures does 

 not enable me, in the case of several worms, to propose an iden- 

 tification which nevertheless may be foreseen. — Comptes liendus, 

 February 22, 1875, p. 499. 



071 a new Order of Eocene Mammals. By Prof. 0. C. Marsh. 



At the last meeting of the Connecticut Academy, Feb. 17th, 

 Prof. 0. C. Marsh made a communication on a new order of Eocene 

 mammals, for which he proposed the name " Tillodontia." These 

 animals are among the most remarkable yet discovered in American 

 strata, and seem to combine characters of several distinct groups, 

 viz. Carnivores, Ungulates, and Rodents. In Tillotherium, Marsh, 

 the type of the order, the skull has the same general form as in the 

 bears, l)ut in its structure resembles that of Ungulates. The molar 

 teeth are of the Ungulate type ; the canines are small ; and in each 

 jaw there is a pair of large scalpriform incisors faced with enamel, 

 and growing from persistent pulps, as in Rodents. The adult denti- 

 tion is as follows: — incisors 2. ; canines -[- ; premolars^; molars |. 

 The articulation of the lower jaw with the skull corresponds to 

 that in Ungulates. The posterior nares open behind the last upper 

 molars. The brain was small, and somewhat convoluted. The 

 skeleton most resembles that of Carnivores, especially the Ursidae ; 

 but the scaphoid and lunar hones are not united, and there is a third 

 trochanter on the femur. The radius and ulna, and the tibia and 

 fibula are distinct. The feet are plantigrade; and each had five 

 digits, all terminated with long, compressed, and pointed ungual 

 phalanges, somewhat similar to those in the bears. The other 

 genera of this order are less known ; but all apparently had the 

 same general characters. There are two distinct families : — Tdlo- 

 theridce, in which the large incisors grew from persistent pulps, 

 while the molars have roots ; and the Stylinodontidce, in which all 

 the teeth are rootless. Some of the animals of this group were as 

 large as a tapir. With Uxjrax, or the Toxodontia. the present order 

 appears to have no near aflSnities. — SiUiman's Amirican Jo^crnal, 

 March 1875. 



On the Mediterranean Species of the Genus Eusyllis. 

 By M. A. F. Marion. 



I have lately indicated, under the name of Ei(x)/Uis Jamelligera, 

 an annelide of the Gulf of Marseilles, belonging to the remarkable 



