No. 463] NORTH AMERICAN INVERTEBRATES. 445 
8. White, with large, en and longitudinal, dark brown markings 
almost covering dorsal surface; often with 16 pairs of rectangular 
marks and pair.of lateral piens lines in addition to bilobed marking 
on dorsal surface of head ; in some varieties markings fuse together ; 
body slender, 8 to 15 mm. in length 
T. (Gzrstedia) reticulatum Coe, S. 
9. With four groups of fragmented ocelli. 
Body usually less than 12 mm. in ke er, ge yellow ; 12 proboscidial 
nerves T. aberrans Coe, A. 
9. Ocelli an: herhaphrodite: 
Body 5 to 10 mm. in length; whitish or very pn d uns probably 
parasitic in Tunicates i um Coe, A. 
DREPANOPHORUS. 
Ocelli numerous, of very large size ; length of body 5 to 10 cm. ; dorsal 
surface dull reddish or orange, thickly covered with fine brownish dots ; 
ventral surface flesh-color with tinge of orange 
D. ritteri Coe, S', 50-150. 
PLANKTONEMERTES. 
Body broad, much flattened, gelatinous and hyaline ; intestinal diverticula 
numerous ; median dorsal vessel present ; length 14 to 47 mm. ; orange 
orpink  . ; à . P. agassizii Woodworth, E (sorteo) 
NECTONEMERTES. 
Professor Heath of Stanford University informs me that a species of this 
remarkable genus has very recently been collected in Monterey Bay, Cali- 
fornia. Its specific diagnosis has not yet been published. 
Order Bdellonemertea. 
Sucking disk present at posterior end of body; intestine coiled, without 
caecum or lateral diverticula ; parasitic in various species of pelecypods 
MALACOBDELLA. 
A single species of this genus has been recorded from California, but it 
has not yet been studied sufficiently to determine whether it is identical 
either with M. grossa of the eastern coast of North America and Europe 
or with M. japonica of Japan. 
