178 REPORT OF COMMISSIONERS OF INLAND FISHERIES. 



lobsters, and, despite its struggles, it was soon dragged under, dis- 

 membered, and eaten by a swarm of lobsters. 



WORKS REFERRED TO. 



Albert F. — "Das Kaugerust der Dekapoden." Zeit. /. wiss. zooL, 



39, pp. 444-536. 1884. 

 Jordan, H. — "Die Verdauung & der Verdauungsapparat des Fluss- 



krebses." Arch. ges. physioL, 101, pp. 263-310. 1904. 

 Herrick, F. H. — "The American Lobster." Bull. U. S. Fish 



Comm. 1895. 

 Huxley, T. H.— "The Crayfish." New York, 1888. 

 Parker, T. J. — "On the Stomach of the Freshwater Crayfish." 



Jour, of anat. & physioL, 11, pp. 54-60. 1876. 



EXPLANATION OF PLATES. 



Plate I, Fig. 1. Stomach of the lobster, x 4. 



Median section of the stomach, x 4. 

 Diagram showing the course of food in the stomach. 

 The ossicles of the stomach, x 4. 

 Stomach of fourth-stage lobster, xiii. 

 Ventral surface of the pyloric sac. x 8. 

 Gastrolith of a fourth-stage lobster four days after the molt. 

 Gastrolith of a fourth-stage lobster eight days after the molt. 

 X 20. 

 " " 9. Section through the gastrolithic plate of a fourth-stage 



lobster just before the molt, x 260. 

 " " 10. Cross section through the middle of the lower part of the 

 cardiac sac. x 14. 

 VII, " 11. Floor of the stomach of the third-stage lobster, x 57. 

 " " 12. Roof of the stomach of a fourth-stage lobster, x 27. 

 VIII, " 13. Cross section through the posterior part of the pyloric sac 

 of a fourth-stage lobster just before the molt, x 27. 

 " " 14. Stomach of a third-stage lobster, x 20. 



A. Lateral tooth, x 57. 



B. Median tooth, x 57. 



