58 Crust. 
X. CRUSTACEA. GIGANTOSTRACA. 
[ 1904 ] 
Munthe (19) : Silurian, Spiti, Himalayas, Trilobita ; Hayden (14) : 
Upper Silurian or Old Red Sandstone, undetermined Gigantostracan ; 
Griffith (12) : Lower Silurian, Venezuela, Trilobita , n. sp. ; Drever- 
mann (8) : Salina, New York, Xiphosura , n. sp. ; Clarke (5). 
Cambrian, Portugal, Trilobita , n. spp. ; Delgado (6) : Spiti, Himalayas, 
Trilobita ; Hayden (14) : Cambrian (?), Tasmania, Trilobita , n. sp. ; 
Etheridge (9). 
IV. SYSTEMATIC. 
XIPHOSURA. 
[See also + Bolton (3), IWalther (27).] 
Limulus , physiology of heart ; Carlson, Amer. J. Physiol, xii, pp. 67-74, 
1 text- fig. : L. polyphemus , abnormal specimen ; Smith, Tufts Coll. 
Stud. No. 8, pp. 379-382, 1 text-fig. 
t Prestwichia signata , Permian, Kansas, p. 23, fig. 1 ; Beecher, Amer. J. 
Sci. (4) xviii, n. sp. 
t Pseudoniscus roosevelti , Salina, New York, p. 89, pis. i & ii, figg. 1-3 ; 
Clarke, Rep. N. York Mus. liv (1), n. sp. 
+TRILOBITA. 
[See also Agnus (1), Grabau (11), Hayden (14), Hind (15), Holm (16), 
Munthe (19), Parkinson (20).] 
Acidaspis pigra, p. 477, pi. xxiii, figg. 1, la-c ; Harbort, Zeitschr. Deutsch. 
geol. Ges. lv (4). 
Arethusina konincfci, p. 83, pi. xi, figg. 14 & 15 ; Reed, Tril. Girvan ii. 
Asaphus sp., p. 49, pi. vii, fig. 9; Reed, t. c. : A. ( Isotelus ) emoryi y type 
specimen re-figured ; Walcott, Pal. Univ. Fasc. ii, pi. 28. 
Bohemilla sp., p. 53, pi. viii, fig. 4 ; Reed, Tril. Girvan ii. 
Bronteopsis scotica , p. 94, pi. xiii, figg. 5-13 ; Reed, t. c. 
B. ardmillanensis , Silurian, Ayrshire, p. 92, pi. xiii, figg. 1-4 ; Reed, t. c. 
Ii. sp. 
Bronteus gramdatus, p. 483, pi. xxiv, figg. 1-7, Jlabellifer, p. xxiv, fig. 8 ; 
Harbort, Zeitschr. Deutsch. geol. Ges. lv (4) : B. andersoni , p. 87, 
pi. xii, figg. 8-11, sp. ind. p. 91, pi. xii, fig. 15, sp. ind. p. 91, pi. xii, 
fig. 16 ; Reed, Tril. Girvan ii. 
B. craigensis , p. 89, pi. xii, figg. 12 & 13, grayi , p. 90, pi. xii, fig. 14, 
Silurian, Ayrshire ; Reed, t. c. n. spp. 
Calymmene senaria , Lower Silurian, Venezuela, p. 91, pi. x, fig. 2 ; 
Drevermann, N. Jahrb. Min. 1904 (1), n. sp. 
Cyclopyge arinata , p. 51, pi. vii, figg. 11-14, pi. viii, fig. 1, rediviva y p. 52, 
pi. viii, figg. 2 & 3 ; Reed, Tril. Girvan ii. 
Cyphaspis ceratophthalma , p. 479, pi. xxiii, figg. 3, 3a, 4, 4a, 5, 5 a-c, 
convexa , p. 482, pi. xxiii, figg. 2, 2a-c* ; Harbort, Zeitschr. Deutsch. 
geol. Ges. lv (4) : 0. megalops , p. 82 ; Reed, Tril. Girvan ii. 
Dikelocephalus jlorentinensis , Cambrian (?), Tasmania, p. 25, pi. x, fig. 4 ; 
Etheridge, Rec. Austral. Mus. v (2), n. sp. 
Encrinurus midtisegmentatus , p. 387, pi. xii, fig. 5 ; Reed, Geol. Mag. (5) i. 
Hicksia n. g. (near Liostracus ), p. 327, elvensis, p. 333, figg. on pis. i, ii, iv 
& v, sphcerica, p. 335, figg. on pis. i-vi, transtaganensis } p. 337, figg. on 
pis. i, ii, v, vi, walcotti , p. 338, figg. on pis. ii-v, castroi , p. 340, figg. 
on pis. i, v, vi, hughesi , p. 341, figg. on pis. ii, v, vi, barroisi , p. 342, 
figg. on pi. ii, deivalqtiei , p. 343, figg. on pis. i, ii, v, minuta , p. 344, 
figg. on pis. ii & v, Cambrian, Portugal ; Delgado, Commun. geol. 
Portugal v, n. spp. 
