ILLUSTRATIONS. 



PIATES. 



Page. 



A CESTODE PARASITE IN THE FLESH OF THE BUTTERFISH: 



Plate I. (1) Specimen of butterfish laid open to show cysts. (2-.'i) Microscopical drawings of cysts and blas- 

 tocysts. (6) Cyst from intestine of squeteague 132 



II. (7) Cyst, blastocyst, and scolex. (8) Blastocyst with scolex emerging. (9) Scolex removed from 

 blastocyst. (10) Part of bothriura. (11) One of the accessory organs, everted. (12-16) Differ- 

 ent views of proboscides. (17) Cyst and blastocyst, with scolex and muscle tissue of host, com- 

 pressed. (18-19) Sections of muscle tissue with cysts 312 



A STUDY OF Twin Lakes, Colorado: 



Plate in. View of Twin Lakes from side of Mount Elbert 151 



Hawaiian Cirripedia: 



Plate IV. (1-2) Scalpellum hawaiense. (3-4) Scalpellum pacificum. (5) Dichelaspis hawaiensis. (6) Poeci- 



lasma l)eUuni. (7) Alepas rex. (8) Alepas percarlnata. (9-10) Verruca halotheca 190 



V. (1-8) Catophragmus darwini 190 



Cirripedia from Pacific coast: 



Plate VI. (1) Scalpellum phantasnia. (2-6) Scalpellum larvale. (7) Scalpellum ealifornicmn osseimi. (8,13) 

 Scalpellum californicum. (9-11) Scalpellum proximum. (12) Scalpellum perlongum. (13) Scalpel- 

 lum califomicum 204 



VII. (1-3) Scalpellum gruvelianimi. (4) Scalpellum gruvelianum secundiun. (.5-6) Balanus galeatus. 



(7-14) Balanus evermanni 204 



VIII. (1-4) Balanus evermanni. (5-8) Balanus aquila 204 



IX. (1-7) Balanus flos. (S-U) Balanus galeatus 204 



X. (1) Balanus evermanni. (2) Balanus aquila 204 



XI. (1) Balanus evermanni. (2) Balanus aquila 204 



Fishes of Hawaii: 



Plate XII. (1) Caprodon schlegeii. (2) Thalassoma neanis 218 



XIII. (1) Anampses godeffroyi. (2) Callyodon perspicillatus 218 



Fishes of Alaska: 



Plate XIV. (1) Argyrosomus alascanus. (2) Osmerus albatrossis 234 



XV. (1) Salmo clarki. (2) Hexagrammos lagocephahis 258 



XVI. Sebastodes aleutianus 284 



XVII. (1) Enophrys claviger. (2) Oncocottus hexacornis 318 



XVIII. (1) Liparis cyclopus. (2) Liparis herschelinus 332 



XIX. Liparis cyclostigma , 332 



XX. (1) Crystallichthys mirabilis. (2) Prognurus cypselurus 332 



XXI. (1) Limipenus medius. (2) Bothrocara mollis 344 



XXII. Bogoslovius clarki 350 



XXIII. Humpback salmon, adult male 360 



XXIV. Humpback salmon, breeding male 360 



XXV. Humpback salmon, adult female 360 



XXVI. Humpback salmon, breeding female 360 



XXVII. Dog salmon, breeding male 360 



XXVin. Dog salmon, breeding female 360 



XXIX. Chinook salmon, adult male 360 



XXX. Chinook salmon, adult female 360 



XXXI. Silver or coho salmon, adult male 360 



XXXII. Silver or coho salmon, breeding male 360 



XXX in. Red salmon, adult male 360 



XXXIV. Red salmon, breeding male 360 



XXXV. Red salmon, adult female 360 



XXXVI. Red salmon, breeding female 360 



XXXVII. Alaska cutthroat trout 360 



XXXVIII. Steelhead trout 360 



XXXIX. Alaska rainbow trout 360 



XL. Dolly Varden trout 360 



XLI. Alaska grayling 360 



X LII . Red rockfish 360 



