44 Journal of Comparative Neurology. 



PLATE VL 



Fig. 2j. Cypris herricki Turner, mandibular palp. D.S., dagger-shaped 

 seta. 



Ftg. 24. Candonopsis pubescens, sensory seta from the four segments of the 

 antenna of the male. 



Fig. 2^. Condonopsis kingslei, do. 



Fig. 26. Candona fabceformis, do. 



Fig. 2^. Candona Candida, do. 



Fig. 2S. Notodromas monacha. Sensory seta from the fifth segment of the 

 antenna. 



Figures 24-28 have been copied from Wenzel Vavra. 



PLATE Vn. 



Fig. 2g. Cypris herricki Turner, auditory organ from a longitudinal per- 

 pendicular section. A. antennulary nerve ; m, muscle. 



Fig. JO. Natodromas monacha, eyes (after Vavra). 



Fig. ji. Cypris herricki Turner, pear-shaped organ of the upper lip, sec- 

 tional view. 



Fig.j2. Cyprino/us incongrzieus (Ra.mdohr), ventral chain. A, antennary 

 nerve ; A N, abdominal nerve ; L, labial nerve ; I/, branch of same to pear- 

 shaped organ ; L^^, branch of same to harp-shaped organ ; La, labrum. 



Fig. jj. Cypris herricki. Turner, auditory organ, from a horizontal-longi- 

 tudinal section. 



Fig. J4. Cyprittotus incongruens (Ramdohr), pear-shaped sense organ of 

 upper lip, surface view. 



Fig. j^. Cypris herricki Turner, tip of mandible showing hairs that be- 

 long to the sensory organ found in the mandible. 



Fig. jb. Cypris pubera, eye, surface view (after Wenzel Vavra). 



PLATE VIII. 



Fig. J7. Cypris herricki, Turner, wall of mid-gut. 



Fig. j8. Cypris herricki, Turner, tip of second foot. 



Fig. jg. Do., do.,'<fi2i\\ of oesophagus. 



Fig. 40. Cyprinotus ificongruens (Ramdohr), transverse section through 

 the mandibular nerve. S, sub-oesophageal ganglion ; md, mandibular nerve. 



Fig. 41. Cypris herricki Tnrner, surface view of wall of mid-gut. 



Fig. 42. Diagram of the central nervous system of Cypris. A, atennu- 

 lary nerve ; Ab, abdominal nerve; At, antennary nerve; L, labial nerve ; L', 

 branch of labial nerve passing to the pear-shaped sense organ ; L''^, branch of 

 labial nerve passing to the harp-shaped sense organ ; Lb, labral nerve ; Lg^, 1st 

 leg nerve ; Lg^^, second leg nerve ; Md, mandibular nerve ; Mx', ist maxillary 

 nerve; Mx'^, second maxillary nerve; T, thoracic nerve; T. V., thoracic 

 ventricle. 



Fig. 4j. Nerve cell of Cypris. 



