i8o 



BULLETIN OF THE BUREAU OF FISHERIES. 



Fig. 170. — Cross section of a pigment spot on the lips. X 750. Fixedin Gttson fluid and stained with Delafield hematoxylin. 

 CEp, ciliated epithelium; GlC t gland cell; PgG, pigment granules. 



Fig. 171.— Cross section through an abdominal senseorgan. X 375. Preparation same as fig. 170. BPPAT.branchof posterior 

 pallial nerve; Cu, cuticula; TH, tactile hair. 



Fig. 172. — Cross section passing through visceral ganglion and osphradium. X 100. Fixedin Flemming fluid and stained 

 with haanalum and congo red. Br, gill; GgC, ganglion cells; HV, horizontal vein; K. kidney; Os, osphradium; PA d, posterior 

 adductor muscle; VG, visceral ganlion. 



Fig. 1 73. — Lateral view of otocy st drawn from a living preparation. X 100. Ot, main body of otocyst ; OiC, otocyst canal; 

 OtG, otolith granules; OtN, otocyst nerve; OtP, otocyst pit containing the external opening. 



