604 



Mr. R. J. Ortlcpp on a new 



in tlie anterior lialf, where these projections give the outline 

 of the strobihi a finely serrated ap[)carance. 



(b) Head. — Thescolex (fig. 1) is well developed, measuring 

 across the suckers from 580 /i, to 650 /a in breadth, with a 

 length varying from about 500 /j, to GOO /j,. ]ts anterior 

 })ortion forms a large and somewhat antero-])Osteriorly 

 llattencd protuberance ; viewed from the anterior aspect 

 this protulterauce is roughly quadriradiatc, each ray forming 



Fi-. h 



G — 



u—DL 



Head. 



i).Z. = dorsal lobe of head protuberance; 7Z'. = hooks covering 

 protuberance; ^.ff'.= rostelIar hooks ; «S.=sucker. 



Fig. 2. 



f 



«=roBtellar hooks; i = hook.=i from suckers; f=hooks covering 

 the protuberance. 



the axis of a bulb-like swelling, separated from its immediate 

 neighi)our on either side by a valley. These four lobes are 

 situated one dorsal, one ventral, and two lateral. 



Except for their median areas the whole surface of these 

 lobes is covered by numerous minute liooks, 5//. to 6/t long 

 (figs. 1 and 2 c) — these are arranged in longitudinal rows. 



The anterior face of the j)rotubcrance is occupied by the 

 rostellum, which is bank into it. The rostellar hooks are of 



