1864. ] DR. J. E. GRAY ON BRITISH CETACEA. 247 
Monodon, Artedi; Linn. S. N. i. 17; Gray, Zool. E. & T. 29; 
Cat. Cetac. 75. 
Monoceros, Charlet; Gray, P. Z. $8. 1863 (misprint). 
Ceratodon, Brisson ; Illiger. 
Diodon or Diodonta, Storr. 
Oryx, Oken. 
Monopon monoceros. ‘The Narwhal. 
Monodon monoceros, Linn. 8S. N.; Fleming, Mem. Wern. Soc. i. 
146; Gray, Zool. E. & T. 29; Cat. Cetac. 75; Turton, B. Fauna, 
15; Fleming, B. A. 37; Jenyns, Man. 43; Bell, B. Quad. 500. 
fig., 505. fig. ; Nilsson, Scand. Fauna, 619. 
Sea Unicorn, Sow. Brit. Mise. t. 9. 
fab. North Sea; skeleton in Museum of Hull Phil. Soe. 
First recorded as found in Britain by Vulpius (Obs. Med. 376, 
t. 18) near the Island of May (insulam Mayam) in June 1648. 
One was observed on the 15th of February, 1800, near Boston, Lin- 
eolnshire (see Lacépéde, Hist. Nat. Cét. 159, t. 5. f. 2, and Mem. 
Wern. Soc. i. 147 ; Fleming, B. A. 37). A young male was found, 
on the 27th of Sept. 1808, at the Sound of Weesdale, Zetland, and 
described by Fleming, Wern. Mem. i. 131, t. 6. 
«The tooth is characteristic of the male. Instances, however, occur, 
though seldom, in which the female has a tooth; one is mentioned 
in Linn. Trans. xiii. 620” (Flem. B. A. 28). 
Suborder II. SIRENIA. 
Body rather hairy. Muzzle bristly. Nostrils two, separate, api- 
cal, lunate, valvular. Fore limbs arm-like, clawed ; hinder depressed, 
expanded, tail-like. eats two, pectoral. Teeth of two kinds, cut- 
ting and grinders (see Gray, Cat. Cetac. B. M. 138). 
Fam. 1. MANATID. 
Manatide, Gray, Cat. Cetac. 138. 
1. Mawnarus. 
Tail rounded. Grinders tubercular. 
? MANATUS AUSTRALIS. Manatee. 
Manatus, Rondel. Pise. 490. 
Trichecus manatus, Linn. 8. N.1. 49. 
Manatus australis, Tilesius, Jahrb. i. 23. 
M. americanus, Desm. Mam. 517. 
M. borealis, Flem. B. Anim. 29. 
Mermaid of the Shetland Seas, Edinb. New Phil. Journ. vi. 57, 
1829 ; Steward, Elem. Nat. Hist. i. 125. 
Hab. Estuaries of Tropical America; Shetland (Steward and 
Fleming). 
The animal mentioned by Steward and Fleming is most probably 
the American Manatee, which may, under extraordinary circum- 
