XIV LIST OF ILLUSTEATIONS. 



Page. 

 Plato! XLII.— Amphinome Lepadis, Syllis spongiphila, Ophioglycera grandis, Sabellapicta, 



Vennilia serrula, Maldane 'bigeps 686 



XJLIII.— Dipolydora concharum, Leprsea abyssicola, Priapnlas, sp., Phascolosoma, ap., 



Tristoma cornutnm, Tristoma laave, Cerebratulus luridus, Sagitta gracilis. 688 

 XLrV.— Sagartia Acanellae, Sagartia abyssicola, Acanella Kormani, Hyalinceoia arti- 



fex, Cladorhiza grandis 690 



OSTEOLOGY OF AMIA CALVA.' 



Fig. 1. — Left lateral view of cranium of Micropterus salmoides 805 



Plate I. — Cranium of Amiaoalva 842 



II. — Skull and primoidal cranium of Amia calva 844 



III. — Cranium and vertebrae of Amia calva, and view of mandible of a Teleostean fish. 



(Micropterus salmoides) 846 



rV. — Right lateral view of the skull of Amia calva 848 



v.— Inner aspect of the right half of mandible of Amia calva 850 



VI. — The palatopterygoidean arcade of Amia calva 852 



Vn.— Mandible of Amia calva, and cranium of a perch (Perca Americana) 854 



VIII.— Upper jaw, shoulder girdle, and pectoral limb of Micropterus salmoides, and like 



parts in Amia calva 856 



IX — Skeleton of the caudal extremity of Amia 858 



X. — Left lateral view of the skeleton of Amia calva 860 



XI. — Left lateral view of the skull of Micropterus salmoides 862 



XII. — Palatoquadrate arch, right side, inner aspect, and right lateral views of cranium 



of Albula vulpes ----- 864 



Xm. — Superior and inferior views of cranium of Albula vulpes, and opercular bones, 



hyoid, symplectic, and other elements of Micropterus salmoides 866 



XIV. — Posterior view and right lateral view of cranium, of Megalops, and shoulder 



girdle and pectoral fin of Micropterus salmoides 868 



OLIGOCH^TOLOGICAL EESEAECHES.t 



Pi-ate I. — Telmatodrilus Vejdovskyi 926 



II. — Telmatodrilus Vejdovskyi, Spirosperma ferox 928 



III. — Spirosperma ferox 930 



I v.— lly odrilns Perrierii , 932 



V. — ^Ilyodrilus fragilis ' i 934 



VI.— Ilyodrilus sodalis 936 



VII. — Hemitubifex insignis 938 



VIU. — Hemitubifex insignis, Tubifex campanulatus 940 



IX. — LimnodrUus ornatus 942 



X. — Limnodrilus Steigerwaldii 944 



XI. — Limnodrilus monticola 940 



XII. — Limnodrilus alpestris 948 



XIII. — Limnodrilus Silvani 950 



XIV.— LimnodrUus Silvani 952 



XV. — Camptodrilus igneus 954 



XVI. — Camptodrilus coraUinus 956 



XVII. — Limnodrilus alpestris, Camptodrilus corallinus, Camptodrilus spiralis 958 



XVIII. — Camptodrilus igneus, CamptodrOus corallinus, Camptodrilus Califomioua 960 



XIX. — Telmatodrilus Vejdovskyi, Limnodrilus alpestris 962 



AQUA-VIVAEIUM. t 



Plate I. — Least expensive form of aqua-vivarium 970 



II. — More elaborate form of aqua-vivarium 970 



m. — Still more elaborate form of aqua-vivarium 970 



WATEE TEMPEEATUEES. $ 



Plate I. — Diagram showing the fluctuations of water temperature in the Chesapeake Bay and 



Potomac River from July 1, 1882, to June 30, 1883 ]03< 



* In Shufeldt's Osteology of Amia calvai 



tin Eisen's Oligochsetological Researches. 



tin Seal's Aqua-Vivarium hs an Aid to Biological Research. 



^ In McDouald'.s Report of Central Station. 



