556 VON NATHUSIUS, SKULLS OF ESKIMO DOGS. 



notice were to some extent congenerous ; «ind, as the extinct 

 Eskimo could not have been in active commerce with other tribes, 

 they could scarcely have crossed their Dogs with another breed. 

 The eight skulls, however, indicate more or less striking differences 

 in those parts which in Dogs are especially variable, irrespective, 

 of course, of those due to relative age, as, for example, the 

 occipital crests. 



" The nasal bones either pass higher up into the forehead than 

 the frontal edges of the maxillary, or they do not reach a line 

 which these edges of both maxillaries touch ; the orbital borders 

 are more or less raised, and therewith the frontal foranina are 

 more or less large ; the forehead between the orbital processes 

 is more or less deeply concave, or nearly flat ; the orbits are 

 smaller or larger ; the zygomatic arch is more or less wide and 

 high, but only one of the skulls has this perfect. These are all 

 characters by which to distinguish the Dogs from Wolves. The 

 nasal bones are all broken at their distal ends. 



" Thus this little collection contributes to the observation that 

 the domestic animals, particularly the Dog, are extremely variable 

 as to the form of skull within limits of a race-type. The skulls 

 are sufficiently well preserved to show that none had a third molar 

 in the upper jaw, a feature not so uncommon as usually thought 

 in studying Dogs' heads." 



LXXXIX.— The Tunicata of East Greenland. By Prof. 

 Dr. C. KUPFFER. 1874. 

 (" Die zweite deut. Nordpolarfahrt," vol. ii. pp. 244, 245.) 



Cynthia villosa (O. Fabricius). Germania Harbour. 

 C. Adolphi, n. sp. Shannon Island. 



Descriptions and synonyms are given in full by the author, 

 loc. cit. 



XC. — The Molluscs, Worms, Echtnoderms, and Coelen- 

 TERATES. By Dr. Karl MObius. 1874. 

 (" Die zweite deut. Nordpolarfahrt," vol. ii. pp. 246-961, 1 pi.) 



These Lists have been extracted without the descriptive remarks 

 given by the author. 



MOLLUSCA (pp. 248-253). 



Gasteropoda. 



1. Chiton albus, L. Fabr. F. Gr., p. 422. Forbes & H., 

 pi. 62, f. 12. Jeffreys, Br. Conch., V., pi. ^6, f. 3. 

 Distiib. Spitzbergen to the Kattegat and Britain, 

 Massachusetts (Gould & Binney). To 550faths. 



