LIST OF ILLUSTRATIONS. IX 
Page 
Fig. 51.—Right clasper of larva of Streptocephalus texanus --..--....-.---.-.- 428 
52.—Right clasper of larva of Streptocephalus texanus -....---..--.-..... 428 
53.—Right clasper of larva of Streptocephalus texanus.-..---.--....---.. 28 
54.—Cast-off skin of Streptocephalus ....-...-.-.----.--.-------.-------. 428 
55.—Bristles of second antennze of larval Eubranchipus GOSH SERA STIR eE 429 
56.—Sete of first maxille of Eubranchipus .--------- .----.----....---.-- 429 
57.—Aunterior antennex of pale Eubranchipus..---.---..-----------.---.-- 429 
58.—End of abdomen of the larval Hubranchipus.-.---...........-.-.--..- 430 
59.—Seta of first maxilla of the Streptocephalus.--.-..--.-------......-..- 430 
60.—Right male clasper.of Eubranchipus _....----..----.-.-------------- 430 
ol —Hemaleclasper of Hubranchipuss: nse ee ees saeeee sees seseee eee cese 4ST 
62.—End of abdomen of larval Eubranchipus -------------........-...... 431 
63.—End of abdomen of larval Eubranchipus .-----.--.-...---...---.---- 431 
64.—Head of abdomen of larval Eubranchipus ...--..-:--..----------.--- 431 
65:—Section ofbrain' of Nebalia) Wipes) 422- See se sen ee ee sae eee Sess o- 43 
66.—Section through thurax of Nebalia bipes ...-.....-...---2-..--------- 439 
67.—Section through end of thorax of Nebalia bipes..---..----..---..---- 440 
68:—Hmbryo of Nebaliaiready to hateh 6225-2252) Cees se see seo ee - 442 
69.—Hymenocaris, Peltocaris, Ceratiocaris, Dictyocaris, Dithyrocaris, Argus 
ES YroU GUNDAS (Ce) oct) We He Sa ey a aT a To aoe ee 444 
TY AD (lav toreeM ate OT CMERTTS 445 69566 Seg eeediee sose = doeegs eas] badeae caqo ue 45, 
71.—A. Echinocaris multinodosus; B. Ech. Buble see ie eine es Ne 451 
62) Di SCINOCATISEDTOWMIATWA ee pas os ey — oes Sete e ON ele tee ator NI IED 451 
G3. Dit hy TOCALIS NEVLUMU wee ies oye oe lela Meelevee sede nee alae le Galea ee lepetes 45% 
LIsT OF PLATES. 
Facing page 
PLATE T.—Limnetis mucronatus, with details.............--.....---..----- 561 
ie himmnetis: couldn. with Gdetalls\s.eec ees see eee eee a eee ae 518 
Li Nscheraibeliraceisan dn Onesiiiesp sense se ee eee eee eee 520 
live Hsthenia calitornica, wath details) ss--ss secs eee ee cence eo. 522 
Ve tisthenlaycompleximanustseaesee eerste eee eee ee eee eee 524 
VI.—Eulimnadia texanus, with details .-.-....---.-.--...-----.----- 526 
VIl.—Eulimnadia texana and agassizii, details sea ear Ea a 528 
NWA Ar temmantertilisadetall sae seam te cee eee ie arene aoe ieee 530 
IX.—Branchinecta paludosa, Swab etek Mev mete hee eye eae IE 532 
X.—Branchinecta arctica and coloradensis, details ...--...----.----- 534 
XI.—Branchinecta. lindahli and Branchipus vernalis -........---....- 536 
XIT.—Streptocephalus texanus, details.-._-........._--.--.---.------: 538 
MT —Chirocephalus holmant, details 222222.-5:----222.-2222--- s.-2- 540 
XIV.—Thamnocephalus platyurus, details era SNe NS SSPE Reale wiatiesaial aleracee 542 
xe —— AUS eam Ge le pu Gn Sy ere sce et ry yl ancl SN A Dn UO UL Re ae 544 
XeVATE = At iis) air Gael CUTS ee way oie tages earns ay eta ry Oe 546 
XV A puss awilclikde hails ese Selene ey GS PRN SM DIR eel ee RES a ye Cane 548 
PREV ATI App ir ssanwy tlre weds eee en aN aa ae 5 
PROTEXG—— Ap sow Hy Le evil gaia Sane ets a ey SEI ES RU WE el ran 552 
BRON = AN US uve by Ve tears tes AUR ake teaee tc, NOL UNE aaa) Se aa, alaee 554 
POX Arp si awvelits acl e tell es sey cae ee ee SNe OI OR) aN ANN oa Oe a 596 
XXII.—Artemia and Branchipus, details .....- 222.222.2222.) 2.2... 558 
ACE ATLA aLeMIS, etal Syme nee see w oy oe yits. Suoa  L RU dean 560 
ROXCUVE Ss Mera dehallsns enn eee e cnc o oat ome ee Me) ms nasi 562 
XONOV FH Stherilay me xcieamay eval siya palsies aye cveveeyemiet toise ay alts) MN ELLE 564 
XXVil—Estheria,morsel, ete., with details).2 2. ob 07 e e ea oe 566 
XXVII.—Limnetis brevifrons, details.........--..- es Ne aS 568 
eX Eispheria Mexicana ebe.,(Qebalise ays o ene vee une alee ue re ene 570 
XOXEEX —Eistolos yoy Phvllopodaseeece eee saeco te ee ese ene eee see ae 572 
XXX.—Histology of Branchipus and Streptocephalus .-..---.....------ 7 
eXeXe — Amn atomiy Of ApUSiccme a eee meets noe ecion cu Kil eS eA VT aT 576 
PXOXeXHIE AMA LOM VOL AD USe eee a Piece ace See mice ce si nyte Sarr Uare Ene Ly NES 
MMO —Histolosy of Bstheria, be ee. se se ol decane t isoee eeeelcoee 580 
XXXIV.—Development of Streptocephalus, ete....-.---.----..---.---..-- 582 
XXX Vi —Development of Apus lucdsamus-- 222 .-222-- 2-2-2 o2ee ssecee ones oe 584 
MOO 1. — Anatomy, of Nehalia bipes a\.2.-2). 205 e/a ose -toeae see ee cde) |) SO 
XXX VII.—Anatomy of Nebalia bipes.. ISIN EN ay sa) USa ees RE a ede pM EES SERA Ey SS 
XXXVIII.—Embryology of Nebalia..-.-...- oe pea aae apeataeiea reves OO. 
XXXIX.—Transformation of Artemia and Branchipus .. See eee etre ey KOR 
And a Zoo-geographical colored map. 
