1864.] DR. J. E. GRAY ON BRITISH CETACEA. 197 
——---->-S-S- 
Turton, | Fleming,| Jenyns, | Bell. 
1807. | 1828. | 1835. | 1837. 
9. Catodon macrocephalus ...... 53-59 59 71 10 
10. Physeter tursio .........00...0068 5 
11, Steno rostratus .........s00000... 
12. Delphinus delphis 
Euphrosyne .e..ee..seeeeee 
DUUSIOL eset cocusvecstsct cess 
15. Lagenorhynchus leucopleurus.|............|-.e.seecccee|eceeeeeeeees 10 
1G $————“val DIROSUTIS Jc 04 st cane lanes] soarven steel Sedmedsedee dives adbetebcleecdanees | 
ACULUS PE sespanceseneseaesna\n«| ce dAesisinde|eencsenaiess|sepacaruees| scceaslecs 
18. Hyperodon batskopf ............ 61 55 70 7 
PQs Uarenocetusdatirons 4 .s.s00); |.) 2eiccuee-|toostncciceelpeesersenecelcecesnene 
20. Ziphius sowerbiensis ............ BS iivi? lessdeteck oss 70, part| 8 
21. Globiocephalus svineval ......)............ 51 67 5 
TINISLY Sae-tewen ceave sie s seks 
IncrassatUsS ...ceeseee..00e 
«Orca gladiator .21.s.-.<eses0e.c. 
CTASSIGENS, i se000hs sess 
26. Grampus cuvieri.............0000 
. 27. Phocena communis 
. Beluga catodon ...............065 é 
29. Monoceros monodon 
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Turton indicates as British 18 species of Cetacea, which are re- 
duced by Fleming to 16, by Jenyns and Bell to 14 species. In 
this paper the number is increased to 30, belonging to 20 genera. 
The British seas seem to be particularly rich in these animals, or 
our zoologists have been more industrious in collecting them than 
others; for, while our fauna contains 30 species, Schlegel, in his 
‘ Fauna of Holland,’ 1862, gives only 10 species, viz., 1. Delphinus 
delphis ; 2. D.rostratus ; 3. D. tursio; 4. D. orca; 5. D. phocena ; 
6. D. melas; 7. D. micropterus; 8. D. hyperodon; 9. Physeter 
——? 10. Balena physalus. 
Nilsson, who had studied my essay in the ‘ Zoology of the Erebus 
and Terror,’ in his ‘Scandinavisk Fauna,’ 1847, enumerates 16 spe- 
cies, viz., 1. Delphinus delphis; 2. D. euphrosyne, Gray ; 3. D. ob- 
scurus ; 4. D. leucopleurus ; 5. D.ibsenii ; 6. D. tursio; 7. D. orca; 
8. D. globiceps; 9. D. leucas; 10. D. phocena; 11. Monodon mono- 
ceros; 12. Hyperodon borealis; 13. Balena rostrata; 14. B. phy- 
salus; 15. B. boops; 16. B. mysticetus. 
I have given here the more important synonyms of the species, 
paying particular attention to the descriptions and figures of British 
specimens, and the names derived from them. For more extended 
synonyms and for the general observations on the genera and the 
species I must refer the student to the ‘ Catalogue of the Cetacea in 
the British Museum,’ where he will find recorded some of the dif- 
ficulties which occur in referring with any certainty to preceding 
authors, even in the case of the most common and generally known 
species ; and at every new reference to authors fresh difficulties occur. 
