STKUCTURE OF THE BRAIN OF THE SESSILE-EYED CRUSTACEA. 13 



Kriegar, K. R. Ueber das Centraluervensystem des Flusskrebses. Zeits. f. wisson. Zoologie xxxiii p 527 

 Jau. 23, 1880. ' ' 



Krohn. Ueber die Verdauungsnerven des Krebses. Isis, 1834. 



Lemoine. Recherohes pour servir .\ I'histoire des systftmes uerveux musculaire et glandulaire de I'dcrevisse. 

 Aun. des sciences nat. 5" sdr. Zoologie, ix, 1868. 



MuLLER, JoH. Acta Acad. Caisareo-Leopold., XIV. 



Newport, G. Phil. Trans., 1834. (Nervous system of Homarus.) 



Oksiannikofk, Ph. Recherches sur la structure iutime du syst&me uerveux des Cr.istac6s et princinalemeut 

 du Lomard. Ann. des sciences nat. 4« siSr., Zoologie, xv, 1861. 



Ueber die feinerer Structur des Kopfgauglions bei den Krebsen, besonders beim Palinurus locusia M6m 



Acad. imp. sc. St.-P^tersbourg, vi. No. 10, 1863. 



Owen, R. Lectures on the comp. anatomy and physiology of the invertebrate animals, 1843. . 



Packard, A. S. Zooh.gy for colleges, 1879. Brain of Cambarus and the blind Orcouectes pelhwidus, briefly 

 described and figured. Fig. 269. j > j 



SciiLEMM. De hepate ac bile Crustaceorum. 1844. 



Swan. Comparative anatomy of the nervous system, 1835. 



Valentine. Nova Acta Nat. Curios, xviii, 1836. 



ViALLANES, H. Etudes histologiques et orgauologiques sur h-s Centres uerveux et les organes des Sens des Aui 

 maux articutes. Premier mdn,oi>e. Le Ganglion optique de la Langoustc ( Panm,rus vulgaris). Annales des Sciences 

 Nat. vi" serie. Tom. xvu, July, 1884, 1-74. 



Weber, E. H. De aure et auditu hominis et auimalium, 1820. 



Will. Archiv fiir Anat. u. Phys., 1844. 



Willis. De anima brutorum, 1674. 



YUNG, E. Recherches sur la structure intime et les fonctions du systfeme uerveux central chez les Crustac^s 

 ddcapodes. Archives de Zoologie exp. et g<5u., vii, 1878. 



De la structure intime dusystfeme nerveux central des Crustaeds ddcapodes. Comptes rendus, Ixxxviii, 



MEROSTOMATA. 

 ^ Milne-Edward-s, A. Recherches sur I'auatomie des Limules. Annales des sciences nat. Zoologie, xvii, Nov., 



Packard, A. S., jr. On the development of the nervous system in Limulus. American Naturalist, ix 422. Julv 



1875. ' ' ^' 



Structure of the eye of Limulus. Amer. Nat., xiv, 212. March, 1880. 



Internal structure of the brain of Limulus. Amer. Nat., xiv, 445. June, 1880. 



o 777:- T''^tof °'"^' ^'^^°^'"'^^' ^'I'l embryology of Limulus polyphemus. Anniversary memoirs of the Boston 

 ooc. .Nat. Hi8t. looO. 



Vander Hoeven, J. Recherches sur I'histoire naturelle et I'auatomie des Limules. Leyde, 1838. 



EXPLANATION OF PLATES. 

 Plate I.— Asellus communis. 



Fig. 1. Longitudinal section throngh the head on one side of mouth aud oesophagus, showing the brain or procerebrum 

 ip c m), first and second antennal ganglia ; mandibular, first and second maxillary, the maxillipedal ganglia 

 aud nerves passing to the antennai and mouth-parts X 1+ inch A. 



Fig. 2. Section through the procerebral lobes in front of the optic nerves X i A. 



Plate II.— Asellus communis. 



Fig. 4. Section of the procerebrum posterior to Fig. 3, x i A. 



Fig. 3. Section through procerebrum and main commissure x * A, 3a, ganglia cells from lobe h. x i C. 



Fig. 5. Section through the median line of the head, involving the ojsophagus and one of the procerebral lobes 



Fig. 6. Section through the head, x i A. 



Fig. 7. Section of the head passing through one side of the first antennal ganglion and showing the origin of the first 



antennal nerve; also the second antennal ganglion, and mandibular ganglion (md.j) X i A. 



Fig. 7a. Section passing near 7 aud through the main commissure. 



Plate III. — Asellus communis. 



Fig. 8. Section passing throagh the main commissure from the procerebral to the 1st pedal ganglion. 

 Fig. 9-18. Horizontal sections from the top of the head downwards X i A. 



