PLATE 32. 



Cuticle and hypodorinis from aide of head unless otherwise stated. 



Hypodermis and its products in Stroi)liomenia spinosa, large specimen. X 205. 

 Same in Lophomenia spiralis. X 25.5. 

 Same in Strophomenia seandens. X 155. 

 Same in Halomenia gravida. X 225. 



Perforation of the somatic musculature in H. gravida by a diverticulum of the mid gut 

 which comes in contact with a modified hypodermal papilla; s, blood sinus. X 255. 

 Hypodermis of Drepanomenia vampyrella. X 255. 

 Same of Ichthyomenia i)orosa. X 330. 

 Same of Dondcrsia californica. X 555. 



Section through the dorsal sense organ of Strophomenia seandens. X 300. 

 Same of Proneomenia hawaiiensis; ne, nerve. X ISO. 

 Same of Lophomenia spiralis; ne, nerve. X 150. 



