BRITISH FOSSIL CRUSTACEA. 5 
BODY-RINGS OF THE CRUSTACEA, WITH THEIR APPENDAGES. 
principal authorities.) 
VI. 
VII. 
VII. 
IX. 
XIX. 
XX. 
XXI. 
I, CePHALON. 
(C. Spence Bate) .1 
. Somite or Segment, bearing the Eyes. 
. Ditto, bearing the Ist Antenne. 
Bo ep 3 2nd Antenne. 
Aire 3 Mandibles. 
De as Ist Maxillee, or Ist 
Siagonopoda. 
6's; Fi 2nd Maxillee, or 2nd 
Siagonopoda. 
Viste: . Maxillipeds, or 3rd 
Siagonopoda, 
II, PEREion. 
1. Bearing the Ist pair of appendages 
or Gnathopoda, or 4th Siagono- 
poda. 
2. The 2nd pair of appendages or 
Gnathopoda, or 5th Siagonopoda. 
3. The 3rd pair of legs, or 1st Pereiopoda. 
AN akin 5 2nd a 
CBee ue: op 3rd of 
6. ,, 6th A 4th 5 
is fy Zhan be 5th . 
III. Pieon. 
1. Ist Natatory legs or 1st Pleopoda. 
2, 2nd af 2nd % 
3. 3rd oF 3rd ” 
4. 1stCaudal appendages, 4th “1 
or Ist Uropoda. 
. 2nd ; 5th Pleopoda, 
or 2nd Uropoda. 
3rd a 6th Pleopoda, 
or 3rd Uropoda. 
. Telson, Terminal joint, or middle tail- 
piece. 
VI. 
VII. 
VIII. 
IX. 
X. 
XI. 
XII. 
XIII. 
XIV. 
XV. 
XVI. 
XVII. 
XVIII. 
XIX. 
XX. 
(21.2) 
I. CepHatic Somites (Huzley). 
1. Somite, bearing the Eyes. 
22, cf es ,, Antennules. 
: re is » Antenne. 
4. oi A », Mandibles. 
}. 5 A », Ist Maxille. 
6. ” ” ” 2nd ”? 
II. TuHoracic Somrirzs. 
1. Somite, bearing Ist Maxillipeds. 
Pe P - 2nd 
3 5 ; 3rd Be 
4. 
2. ‘ = 
6 4th to 8th Somites, bearing Ambu- 
7 latory legs. 
8. 
III. Appomern. 
1. 
2. 
3. 
4, : 
Each Somite furnished with a pair 
of appendages. 
D. 
6. 
*Telson,’ or median appendage, not 
furnished with any articulate limbs.” 
' See Report on the “ British Edriophthalma ” (‘ British 
Assoc. Report’ for 1855, by C. Spence Bate, when these 
terms were first introduced. See also ‘ History of British 
Sessile-eyed Crustacea,’ by C. Spence Bate, F.L.S., and 
J. O. Westwood, M.A., F.L.S., Part i, p. 3. October, 1861. 
London: Van Voorst. 
> «The last segment never bears true appendages, and is 
developed subsequently to the others from the dorsal surface 
of the body. 
Hence we are justified in regarding it, not as a 
somite, but asa peculiar median appendix to which the special 
name ‘telson’ [C. Spence Bate] may be applied.”—See 
Prof. Huxley’s Lectures, ‘ Medical Times and Gazette,’ 1857. 
