ILLUSTRATIONS. 
VII 
Natural history of the: American lobster — Continued. Facing page. 
Plate XLIV. (i) Immature ovary of lobster with abnormal ring on left anterior lobe for 
transmission of left antennal artery. (2) Reproductive organs, from right 
side of male. (3) Transverse section of homy pouch of seminal receptacle 
of female lobster. (4) Left third swimmeretof female. (5) Lobster’s egg. 408 
XLV. (1-5) Diagrams to illustrate structure and growth of ovary of lobster from 
first larval stage to maturity 408 
XLVI. (1) From transverse section of ovary of lobster 8>J inches long, July 25. 
(2) Part of longitudinal section of first larva, at point of attachment of 
abductor mandibuli muscle. (3) Part of transverse section of dactyl of 
soft lobster, close to spines of dentate margin 408 
XLVII. (1) Part of section parallel to long axis of gill. (2) Diagram of transverse 
section of lobster’s gill. (3) Transverse section of oviduct of adult lobster 
immediately before egg-laying. (4) Transverse section of oviduct of adult 
lobster taken immediately after egg-laying 408 
Anatomy and physiology of the wing-shell Atrina rigida: 
Plate XLVII I . (16) Drawing of specimen to show relative position and appearance of vari- 
ous organs 440 
XLIX. (17) Drawing of arteries of right side of body and of left mantle lobe, the 
shell, right mantle lobe, gills, and kidneyshaving been removed. (18) 
Drawing of arteries of left side of body, the shell, left mantle, gills, pos- 
terior retractor muscles of the foot, and kidneys having been removed. 
(19) Drawing of principal veins of right side of body, the shell, right 
mantle lobe, and gills having been removed 440 
L. (20) Semidiagrammatic drawing of a specimen, ventral side up, to show 
veins which enter kidneys and those which emerge from them 440 
TEXT CUTS. 
Review of 
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the salmonoid fishes of the Great Lakes: 
Cristivomer namaycush siscowet. Siscowet 
Leucichthys harengus. Saginaw Bay herring 
Leucichthys harengus. Saginaw Bay herring 
Leucichthys harengus arcturus, new subspecies 
Leucichthys sisco. Cisco of Lake Tippecanoe 
Leucichthys sisco huronius. Lake Huron herring 
Leucichthys ontariensis, new species 
Leucichthys artedi. Lake herring 
Leucichthys artedi. Lake herring, female 
Leucichthys artedi bisselli. Rawson Lake herring 
Leucichthys eriensis. Lake Erie herring, jumbo herring 
Leucichthys supemas, new species. Cisco of Lake Superior. 
Leucichthys cyanopterus, new species. Bluefin 
Leucichthys hoyi. Cisco of Lake Michigan 
Leucichthys zenithicus. Lake Superior longjaw 
Leucichthys manitoulinus, new species. Manitoulin tullibee 
Leucichthys tullibee. Tullibee 
Leucichthys tullibee. Tullibee 
Coregonus clupeaformis. Labrador whitefish 
Coregonus stanleyi 
Leucichthys osmeriformis. Smelt 
Coregonus coulteri. Coulter’s whitefish 
Coregonus oregonius. Oregon whitefish 
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