POLYCLADS OF THE EAST COAST — PEAKSE 

 Genus HOPLOPLANA Laidlaw 



HOPLOPLANA INQUILINA (Wheeler) 



79 



Planocera inquilina Wheeleb, 1894, p. 196. 



Several specimens were obtained from Woods Hole, Mass., and 

 have been added to the National Museum collections. This polyclad 

 lives in the shells of the large snail Busycon. 



FiGDRH 28. — Hoploplana thaisana, new species, h. Brain ; e, eyes ; en, enteron ; g, gonads ; 

 tn, mouth ; nt, nuchal tubercles ; p, pharynx ; u, uterus ; vd, vas deferens ; d, male 

 opening ; ? , female opening. 



HOPLOPLANA THAISANA, new species 



FiGUEE 28 



Body flat and short; in preserved specimens about two-thirds as 

 wide as long (3.0 by 2.1; 2.4 by 1.5; 2.2 by 1.3, type; 1.6 by 1.3; 

 1.4 by 0.9; 1.0 by 0.7 mm). Tentacular eyes are almost one-third of 

 length of body from anterior end. The number in six specimens (3.0- 

 1.0 mm) was 36, 52, 26, 28, 40, 20. The number of cerebral eyes in 

 the same animals was 22, 12, 10, 10, 6, 4. The tentacular eyes are usually 



