468 PROCEEDINGS OF THE NATIONAL, MUSEUM vol.89 



that had come from the Carolinas. Now that a specimen from 

 Florida (Port St. Joe, collected March 11, 1936) has turned up in 

 the Pearse material, it may be asserted with certainty that the spe- 

 cies is a native of the southern part of our Atlantic coast. Previous 

 to this finding I was inclined to believe that the vessel had acquired 

 the worms elsewhere. The probability that the other poly clad found 

 by Verrill on the same vessel, namely, Stylochiis frontalis^ is also 

 native to the same region, induced me to examine Verrill's figure and 

 description of this form more closely, and I then recognized it as 

 the polyclad known as Stylochus inimicus (see p. 461). 



Genus NOTOPLANA Laidlaw, 1903 

 Leptoplana (in part). 



Definition. — Leptoplanidae with distinct seminal vesicle and cham- 

 bered prostatic vesicle; the duct from the seminal vesicle projects 

 into the interior of the prostatic vesicle; tentacles usually absent. 



NOTOPLANA ATOMATA (O. F. MUUer, 1776) 



Planaria atomata O. F. MtJLLER, 1776, p. 223. 



Leptoplana atomata 0bsted, 1843, p. 569. 



Leptoplana drowiachensis 0rsted, 1845, p. 415. 



fPolycelis variabilis Girard, 1850, p. 251. 



Leptoplana variabilis Diesing, 1881, p. 542. — Vekbiij,. 1892, p. 480, pi. 41, fig. 7; 



pi. 43, figs. 2, 3. 

 Leptoplana virilis Verrill^ 1892, p. 478. — Pearse and Walker, 1939. p. 17, fig. 8. 

 Leptoplana elUpsoides Verriul, 1893, p. 483, pi. 40, figs. 5, 6; pi. 43. fig. 4 (not 



L. cllipsoides Gir.vrd, 1854). 

 Notoplana atomata Bock, 1913, p. 195. — Hyman, 1989a, p. 135, tig.s. 4, 5. 

 Leptoplana angusta Peakse, 1938, p. 76, fig. 26 (not L. angusta Verriix. 1893). 



Mate-rial. — Many whole moimts in Pearse collection, some labeled 

 Notoplana atomata^ others Leptoplana angusta^ and heptoplmm 

 virilis; several unidentified vials in collection of U. S. National 

 Museum; six whole mounts found in Peabody Museum, two labeled 

 Leptoplana variabilis by Verrill. 



Form. — Typically leptoplaiiid, elongated obovate or oblanceolate 

 (see Hyman, 1939a, fig. 4, p. 137), broadest through the level of the 

 brain, thence tapering to the rounded or obtuse posterior end ; tenta- 

 cles absent; maximum length 28 mm. 



Eyes. — In four consi)icuous, well-separated clusters, two tentacular 

 and two cerebral; tentacular clusters rounded of 6-15 large eyes 

 and a few smaller ones; cerebral clusters more elongated, of 15-60 

 eyes of various sizes, but smaller than the largest of the tentacular 

 eyes. Number of eyes increases with age. 



Color. — Various shades of brown, more or less flecked and streaky. 



Digestive tract. — Pharynx central, elongated, well ruffled, mouth 

 anterior to center of pharynx, intestinal branches radiating, anasto- 



