M. F. LINDER, DEL. 



Hydroids from " Pentacrinus Ground." 



Fig'. 1. Si;KTri,.\Ki:LLA i..\\\ v.\K. kobtsta. AUiiiaii. 



Fig. la. FiLiiLLVM sp., a parasitic Hj-droid. 



Fig. 2. Sertulakici-la Formosa. Fewkes. 



Fig-. 2a. Gonatigium of same. 



Fig-. 2/'. Lak<i;a vknvsta. Allmaii. 



Fig. 3. Ohki.la hy.\mn.\. Clarke (found on lloatiiig sea-weed) 



Fig. 3(7. Magiiilied liydraiith of same. 



Fig. 4. Lictokella convali.aria (V) (AUmaii). 



Fig. 4(7, f\ c. Details of same. 



Fig. 5. Sertvlarella yuADKATA. Nutting. 



Fig. 5(7. Magnified lij-drotheca of same. 



Fig. Zb. Parasitic campanulaiian. 



