5 Arachn. Systematio- 
Swinnerton, H. IT. Tho facial suture 
of Trilobites. Gcol. Mag. Ijondon 
Dec. vi 6 1919 (103-110) text-figs. 22 
Versluys, J. Die Kiemon von Limn- 
lus und die Lungen der Arachniden. 
Amsterdam Bydr. Dierk. 21 1919 (41- 
48) text-figs. 23 
II.— SUBJECT INDEX. 
N.B . — The number in Clarendon^ when' 
not referring to a Volume, refers 
lo the list of Tiileri. 
GENERAL - 2803-2823. 
General account of Trilobita ; Rich- 
ter, 14 : Morphology and affinities of 
Trilobita ; Caiman, 3. 
Facial suture, Trilobita ; S winner- 
ton, 22 : Muscle-attachments in head 
of Trilobita', Born, 1. 
Gills of Limulus ; Versluys, 23. 
Swimming of Trilobita ; Richter, 
15. 
Evolution, Trilobita ; Richter, 16. 
DISTRIBUTION = 2827. 
(Geological.) 
Cambrian. 
Britain, Trilobita ; Lake, 9 : Tonkin, 
Trilobita ; Mansuy, 10 : Australia 
and Tasmania, Trilobita ; Etheridge, 
4. 
Ordovician. 
Sweden, Trilobita ; Sjoberg, 21 : 
Ohio, Trilobita ; Foerste, 6. 
Ordovician and Gothlandian, Ton- 
kin, Trilobita; Mansuy, 11. 
Silurian. 
Sweden, Trilobita, Eurypterida ; 
Hede, 7 : Sweden, Trilobita ; Hede, 8 : 
Spain, Trilobita ; Born, 2 : Ohio, Tri- 
lobita ; Foerste, 56 : N.S. Wales, Tri- 
lobita ; Mitchell, 13. 
Devonian. 
Germany, Trilobita ; Richter, 16- 
20 : N.S. Wales, Trilobita ; Mitchell, 
13. 
Carboniferous. 
Australia, Trilobita ; Mitchell, 12. 
—Trilobita. 2831 
HI.— SYSTEMATIC INDEX 2831 
N.B. — The number in Clarendon type, 
when not that of a Volume, refers to 
the list of Titles. 
fTRILOBITA. 
tloEN 1 . — Calman 3. — Richter 14, 
15, 19. — SwiNNERTON 22. 
Acidaspis {Ceratocephala sandber- 
geri sp. n. Devonian Wiesbaden p. 467 
figs., Richter Centralbl. Min. 1917. 
’ Acrolichas gon n. tA^)o Lichas 
cucullus Meek :ui I Worthen p. 402, 
Foerste Ohio Nat. 19. — A. shideleri 
sp. n. Ordovitiun, Ohio, p. 73 figs., 
Foerste Bull. Sci. Lab. Denison 
Univ. 19. 
Adaslocephalujn gen. n. {Phacopinae) 
p. 446, teleotyjncum sp. n. Devonian N.S. 
Wales p. 447 figs., Mitchell Proc 
Linn. Soc. N.S.W. 44. 
Agraulos tonJcinensis sp. n. Cambrian, 
Tonkin p. 19 figs., Mansuy Mem. Serv. 
Geol. Indochine 4 fasc. 2. 
Angelina sedgwicki p. 112 figs.. Lake 
B rit. Camb. Trilobites. 
Anomocare cf. subquadratum p. 26 
fig., Mansuy Mem. Serv. Geol. Indo- 
chirie 4 fasc. 2. 
Asaphus nobilis var. n. caudiculaius 
’ p. 354 figs.,'BoRN Abh. Senckenb. Gee. 
36. 
Astycoryphe gen. n. p. 2, sencken- 
/ b'ergiana p. 3, gracilis p. 11, westfalica 
sp. n. Devonian, Germany p. 14, 
'novdki p. 14, brilonensis sp. n. Devonian, 
Germany p. 16, champernowni p. 16, 
^s^figs., Richter Senckenbergiana 1. 
Beltella gen. n. near Olenus p. 102, 
depressa p. 104, bucephala p. 106, 
verisimilis p. 107, figs.. Lake Brit. 
Camb. Trilobites. 
Blackwelderia smensis, p. 10, cilix 
p. 11, alastor p. 12, speciosa sp. n. p. 1.3, 
Cambrian Tonkin, figs., Mansuy Mem. 
Serv. G6ol. Indochine 4 fasc. 2. 
Brachymetopus dunslani sp. n. Car- 
boniferous, Australia p. 486 figs., 
Mitchell Proc. Linn. Soc. N.S.W. 43. 
Bumastus cf. ioxus p. 386 fig., 
Foerste Ohio Nat. 19. 
