5 Arachn. 
Systematic — Trilobita. 
2831 
T.esch, P. Pormisohe trilobieten van 
Atjeh. [Permische Trilobiten von 
Atjeh.] Amsterdam Tydschrift 
Aardrykskundig Gonootschap 33 1910 
(610-611). 17 
Tothill, J. D. The Ancestry of Insects 
with particular reference to Chilopods 
and Trilobites. Amer. J. Sci. New 
Haven Conn. 42 1916 (373-387) figs. 18 
Walcott, C. D. Cambrian Geology and 
Paleontology, iii. No. 3. Cambrian 
Trilobites. Washington D.C. Smith- 
sonian Inst. Misc. Collect 61 (157-258 
29 pp. index) pis. xxiv-xxxviii. 19 
Walcott, C. D. Cambrian Goology 
and Paleontology, iii. No. 5. Cambrian 
Trilobites. Washington D. C. Smith- 
sonian Inst. Misc. Collect. 64 (303- 
456 + 32 pp. index) pis. xlv-lxvii. 19a 
[Weber, G. F.] BedepT., F. d>. Ha- 
xo;\aa Bepxiie-KaMeiuioyrojibHtiXT> Tpn- 
JiofmTOB'B Kb KpuMy. [Une trouvaille 
do trilobites dans lo carbonifere su- 
pcricur de la Crimee.] Petrograd Bull. 
Ac. sc. (Scr. 6) 1915 (1657-1660) 2 fig. 
20 
II— SUBJECT INDEX 
N.B. — The number in Clarendon , when 
not referring to a Volume , refers to 
the list of Titles. 
GENERAL = 2803 2823. 
Structure, Pacdcumias (Tril.); 
Burling, 3 : Trinucleus (Tril.) ; Reed, 
13 : Cephalic sutures, Trilobita ; 
Ruedemann, 15 : Median Eye, Trilo- 
bita ; Ruedemann, 14, 15. 
Connective tissues, Limulus ; Brad- 
ley, 2 : Oxyhaemocyanin, Limulus ; 
Alsberg, 1. 
Digestion, Limulus ; Mattill & Mat- 
till, 9. 
Habitat, Eurypterida ; Ruedemann, 
15. 
Phylogcny, Trilobita and Insecta ; 
Tothill, 18. 
DISTRIBUTION - 2827. 
(Geological.) 
Palaeozoic, Graz, Trilobita ; Heritsch, 
Ordovician to Devonian, N. America, 
Odontopleuridae (Tril.) ; Raymond, 12. 
Cambrian to Devonian, Trilobito. ; 
Gttrich, 4a. 
Cambrian. 
Trilobita ; Walcott, 19, 19a : Nuneaton 
distr., Warwickshire, Trilobita ; Ming, 
6 : New York St., Trilobita ; Ruede- 
mann, 15. 
Lower Cambrian, Brit. Columbia, 
Trilobita ; Burling, 3. 
Middle Cambrian, N. America, 
Albertclla (Trilob.); Burling, 4 : Car- 
narvonshire, Trilobita ; Nicholas, 10. 
Ordovician. 
Now York State, Trilobita ; Ruede- 
mann & Raymond, 15. 
Silurian. 
New York St., Eurypterida ; Ruede- 
mann, 15. 
Alexandrian, Illinois, Eurypterus ; 
Savage, 16. 
Devonian. 
Atjeh, Trilobita ; Klein, 7. 
Carboniferous. 
New York St., Xiphosura ; Ruede- 
mann, 15. 
Morrow Group, Arkansas and Okla- 
homa, Trilobita ; Mathor, 8. 
Coal Measures, Lancashire, Bclinurus , 
Parker, 11. 
Carbonifere superieur, Crimee, Trilo- 
bita ; Weber, 20. 
Permian. 
Atjeh, Trilobita ; Tesch, 17. 
III.— SYSTEMATIC INDEX = 2831. 
N.B. — The number in Clarendon type, 
when not that of a Volume , refers to 
the list of Titles. 
tTRILOBITA. 
Burling 4. — Klein 7. — Ruede- 
mann 14. — Tesch 17. — Tothill 18. 
Acrocephalites americanus p. 177, 
aoris, (?) aster , p. 178, (?) glomeratus, 
haynesi, insignis, p. 179 (?) majus , 
