118 



It is a most interesting addition to the British fauna, being the 

 second of this genus added within the lašt year. 



3. I may remark, that Balmna minor borealis of Dr. Knox in the 

 šame collection is the Baltenoptera rostrata of my papers. 



4. In the šame collection there is a stufFed skin of a fcetus of a 

 Northern or Right Whale (Balcena Mysticetus), two feet four inches 

 long, showing the large flap near the edge of the lower lip, " destined 

 to cover in the baleen," and a most beautiful skeleton of the šame 

 specimen. The bones of the head are distinctly ossified, but the 

 ręst of the skeleton is only cartilaginous. There are also (No. 36) 

 "the teeth of the fcetal Mysticete preserved in alcohol ;" and Dr. 

 Knox observes, " they never cut the gums, but become gradually 

 reabsorbed," which agrees with Professor Eschricht's account of the 

 teeth of Megapteron ; and further, Dr. Knox remarks, " The integu- 

 mentary system furnish the baleen, -vvhich is evidently a modified 

 form of hair and cuticle." (p. 22.) 



5. I may here add, as determining the synonyma, that the Phoca 

 Leopardina of Professor Jameson in Wedders ' Voyage,' from the spe- 

 cimen preserved in the museum of the Edinburgh University, is the 

 šame animal as I described under the name of Leptonyx Weddelii, 

 figured in the ' Zool. Ereb. and Terror.' 



A foetus extracted from a specimen of the Pilot Whale {Globioce- 

 phalus Svieval) was six feet long. 



In Lagenorhynchus leucopleurus the first, second and third cervical 

 vertebrse are united by their spinous process, the ręst free. 



In Globiocephalus Svieval the second and third cervical vertebrae 

 are united, the ręst free. 



In Monodon monoceros the second and third cervical vertebrae are 

 united by the spinous process, not by the body, and the ręst are free. 



In Delphinus Tursio the atlas and the second cervical vertebra are 

 united by the body, the spinous and lateral processes, and the ręst 

 are free and thin. 



There is a perfect specimen of Hyperoodon latifrons, brought from 

 Greenland by Capt. Warehara, in the museum at Newcastle, rather 

 smaller (seven feet long) than tbe one from Orkney in the British 

 Museum. There is the skeleton of an adult Hyperoodon from the 

 Firth of Forth in the anatomical museum of Edinburgh University 

 with the skull sixty inches long ; the crests are very thick, but quite 

 separate, and ■vvith flat perpendicular walls on the inner side. 



There is another skull of the šame species, from a specimen 

 stranded on the coast of Lancashire, in a garden near Newly Bridge. 



3. DeSCRIPTIONS of NEW OR LlTTLE-KNO'VVN CrUSTACEA IN THE 



Collection at the British Museum. By Adam White, F. L. S., 

 R'Iember of the Ent. Soc. of Stettin, and Assistant in the 

 Zool. Dept. Brit. Museum. 



Family MAiADiE. 

 Xenocarcinus, White, Appendix to Jukes's Voyage of H.M.S. Fly. 



