GIGANTOSTRACA, TRILOB ITA. 
Crust. 41 
Variations in development of Limulus : retardation in invagination of 
thoracic appendages; absence of abdominal or 3 first thoracic appendages 
on one or both sides ; multiplication of appendages (cheliceroe), or other 
organs (lateral eyes and neuromeres) ; fusion of right and left halves of 
embryo ; fission of embryo (double and triple embryos) ; Patten. 
Physiology of blood and circulation in Limulus ; J olyet & 
Viallanes. 
SYSTEMATIC. 
TRILOBITA. 
■f Acidaspis : revision of British Silurian species, and description of 9 of 
them, with their synonyms; Lake. A. convexa , n.sp., Keisley Lime- 
stone, Reed (1) p. 425. 
4 Acroccplialites, n. g., for Solenopleura ? stenometopa , Ang. ; Wallerius. 
Agnostus exsculpatus , Ang., varr., Integra and sulcifera , n. varr., A. fall ax, 
Linrs., var. msignis , n. var., and A. planicauda , Ang., var ,,vestigothica, 
n. var. ; Wallerius. A. rex, Bar., var. transectus , n. var., A.fallax, 
Linrs., var. trilobatus , n. var., A. natlwrsti, Brogg, var. confluens, 
n. var., A. jissus , Lundg., var. trifissus, n. var., A. Idvigatus, Dahn, 
varr. terranovicus , ciceroidcs , and mamilla , n. varr., E. N. America ; 
Mathews, Tr. N. York Ac. 
"Ampyx binodulosus , n. sp., Keisley Limestone ; Reed (1) p. 409. 
*■ Bathyurus schucherti, n. sp., Clarke, p. 724. 
" Ceraurus , tabulation of American species; Clarice, p. 738. 
•* Cheiropyge , n. g., with C. himalayensis , n. sp., a single specimen from 
Permian ClifE of Chitichun ; Diener, Denk. Ak. Wien, lxii, p. 589. 
f Cheirurus keisley ensis, n. sp., and C. ( Pseudospliarexochus') subquadratics , 
n. sp., Reed, p. 421. 
f Conocephalites suecicus, n. sp., W. Gothland, Wallerius. 
t Cryphdus ( Malladaia ) lucia, n. sp., and 2 other species, Devonian, Santa 
Lucia, CEhlert, p. 812. 
ACybele winchelli , n. sp., Clarice, p. 742. 
T Cyphaspis ? harlmessi, n. sp., Keisley Limestone, Reed, p. 435. C. ? 
galenensis, n. sp., Clarice, p. 759. [See also under Tdrnquista.il 
ACyrtometopus schofieldi , n. sp., Clarke, p. 735. 
jDinesus, n. g., with D.ida, n.sp., probably of Cambrian age, Heath- 
cote, Australia ; Etheridge, P. Soc. Victoria, viii, pp. 52-64. 
j 'Encrinurus cristatus and vannalus , n. spp., Clarke, p. 739. 
j Gerasaphes , n. subg. of Asaphus , with G. ulrichana , n. sp. ; Clarke, 
p. 710. 
■\Haipina mmnesotensis , rutrellum , n. spp., and a sp. ?, Clarke, p. 755. 
flllcenus galleatus , n. sp., p. 414, and I. bowmani , Salt., varr. brevicapita- 
tus and longicapitatus , n. varr., p. 412, and I. sp. ?, p. 416, 
Keisley Limestone, Reed. 
*| ’Lidias, table of American species ; Clarice (3) p. 753. L. bifurcatus, 
n. sp., for L. bidbiceps , Phill. ex parte, p. 431, and L. conformis, 
Ang., var. keisley ensis, n. var., p. 427, Keisley Limestone, Reed. 
Malladaia , n. subg. of Cryphceus, with C. (M.) lucid, n. sp. ; Oehlert, 
l. c. p. 812. 
4 Odontochile harsiaca , n. sp., Dolomite Sandstone, Kleinlinden, Kayser, 
Schr. Ges. Marburg, xiii, p. 15. 
t Oxygia marginata , n. sp., Tremadoc Slates, Carmarthen, Crosfield & 
Skeat, p. 538. 
f Parabolinella, n. sp. ? Tremadoc Slate, Carmarthen, iid. p. 537. 
f Paradoxides tessini, Ang., var. incerta , n. var., W. Gothland; Wallerius, 
