ADDITIONS AND CORBECIIONS. 387 



At page 196, add to cliaracters of Section I. : — 



The pectoral Jm short, broad, truncated. The deep cavity on. the croion of 

 the skull surrounded bt/ perpendicular walls formed by the doubled-up 

 maxillaries and occiput. Catodontina. 



Add to generic characters : — 



The atlas oblong, transverse, nearly twice as broad as high ; the 

 central canal subtrigonal, narrow below (see fig. p. 207). 



The cervical vertebree in Catodon are united into a single mass by 

 their bodies, the neural arch, and the lateral processes. The lateral 

 processes of the anterior vertebrae are produced, and form a thick, 

 subconical, triangular prominence on each side of the mass ; the front 

 surface is nearly flat ; and the lateral processes of the hinder vertebrae 

 are shorter and shorter to the last. The hinder surface shelves from 

 before backwards, and is arched over with some conical prominences, 

 which indicate the lateral processes of the different vertebrse of 

 which the mass is formed. The first dorsal vertebra is sometimes 

 partially anchylosed with the seventh cervical vertebra. The arm- 

 bones are very short. 



Catodon macrocephahis (page 202), add to synonyms : — 



Phyaeter macrocephalus, Murie, P. Z. S. 1865, 390. £ 1, 2 (figures of 

 deformed lower jaws). 



The skeleton in the Paris Museum, which was purchased in London, 

 appears to be made up of the bones of several animals, as it has more 

 vertebrse and ribs than any of the skeletons which have been pre- 

 pared from a single specimen. It is very imperfect in other respects, 

 wanting the phalanges, <fec. 



The British Museum has received the skeleton of an adult Sperm 

 Whale that was cast ashore at Wick, on the coast of Scotland. 



The Museum of the Eoyal CoUege of Surgeons has received the 

 skeleton of a Sperm Whale taken on the coast of Australia. 



Mr. Mower, from the examination of the skeleton at Burton Con- 

 stable, the one from Scotland in the British Museum, and the one 

 from AustraHa in the Eoyal College of Surgeons, believes that they 

 are most probably all one species. The Sperm Whale is essentially 

 an inhabitant of the tropical seas ; the specimens which reach the 

 shores of Europe and the Southern Ocean are probably .only stray 

 animals thrown out of their usual course by accidental circum- 

 stances ; and this explains why they only occur at distant periods. 



After end of Catodon (page 210), insert : — 

 2. MEGANEURON. 



Animal unknown. 



The atlas is thin, high, being only about one-fourth wider than it 

 is high ; the lower and lateral margins are arched, the lower edge 

 being the most so. The neural arch is low, transverse, with a nearly 

 ^ 2c2 



