424 EDGAE J. ALLEN. 



13. KiNGSLEY, J. S. — " The Development of Crangon vulgaris," 'Bull. 



Essex Inst./ 1887, 1889. 



14. KoRSCHELT, E., und Heidee, K. — ' Lehrbuch der Vergleiehenden 



Entwickelungsgeschichte der Wirbellosen Thiere,' Jena, 1891. 



15. Lankester, E. R. — "Note on Memoir by GuUand, 'Evidence in 



Favour of the View that the Coxal Gland of Limulus and of other 

 Arachnida is a ModiBed Nephridium,' " 'Quart. Journ. Micr. Sci.,' 

 XXV, 1885. 



16. Lebedinski, J. — " Einige Untersuchungen liber die Entwickelungs- 



geschichte der Seekrabben," 'Biol. Ceutralbl.,' Bd. x, 1890. 



17. Marchal, p. — " Recherches anatomiques et physiologiques sur 



I'appareil excreteur des Crustaces Decapodes," ' Arch. Zool. exper.,* 

 t. X, 1892. 



18. Reichbnbach, H. — ' Studien zur Entwickelungsgeschichte des Eluss- 



krebses,' Frankfurt, 1886. 



19. Sedgwick, A. — " The Development of the Cape Species of Peripatus," 



parts 1 — 4, ' Q,uart. Journ. Micr. Sci.,' vols, xxv — xxviii, 1885— 

 1888. 



20. Weldon, W. F. R. — " The Renal Organs of certain Decapod Crus- 



tacea," 'Quart. Journ. Micr. Sci.,' vol. xxxii, 1891. 



EXPLANATION OF PLATES XXXVI, XXXVII, and 

 XXXVIII, 



Illustrating Mr. Edgar J. Allen's paper on '^ Nephridia and 

 Body-cavity of some Decapod Crustacea." 



List of Reference Letters. 

 Ant. a. Antennary artery. Ao. c. Cephalic aorta, b. c. Central body- 

 cavity, bl. Bladder of green gland, b. lat. Lateral cavity of body. c. 

 Dorsal sac (coelom). car. Carapace, c. m. Cephalic 'muscle, con. t. Con- 

 nective tissue, cor. Blood-corpuscle, cut. Cuticular layer of renal tube. 

 E. Point at which bladder enlarges, ect. Ectoderm, e. s. End-sac. ex. o. 

 External opening, gen. Genital organs. hi. Heart, int. Intestine. /. ff. 

 Tissue where blood-corpuscles are formed (lymphatic gland). It. Liver lobe. 

 mes. Mass of cells from which dorsal sac develops, mus. Muscle. Mr. II. 

 Maxilla II. n. c. Nerve-cord. 0. Point where bladder of green gland joins 

 ureter and opens, o. es. Opening of end- sac into tube. per. Pericardium. 



