POLYCLADS OF THE ATLANTIC COAST^ HYMAN 485 



Digestive tract. — Oval ruffled pharynx in anterior half; mouth an- 

 terior to center of pharynx. 



Reprodiictive system. — Described in Hyman, 1939b. 



Distribution. — Florida, Bermudas. 



Habits. — Among stones; also swims. 



Remarks. — This species was described by Girard from the eastern 

 coast of Florida. Although it has not since been taken there, it 

 probably still occurs. It is found sparingly at Bermuda along the 

 causeway between Longbird and Castle Islands. 



?THYSANOZOON BROCCHI (Riaso. 1818) 



Tergipes brochi Risso, 1818, p. 373. 



Thysanozoon brocchi Gritbe, 1840, p. 55. — Peabse, 1938, p. 85. 



Pearse (1938, p. 85) records collecting 15 specimens of a "papillate 

 polyclad" which he identified as Thysanozoon hrocchi, among eelgrass 

 in Crooked Island Sound, Farmdale, Fla. Although the facts that 

 T. hrocchi has a wide distribution and that other Mediterranean 

 pseudocerids occur at Bermuda make this identification at least plaus- 

 ible, it cannot be accepted as certain without a more detailed study. 

 I have been unable to obtain any specimens for study. 



Genus PSEUDOCEROS Lang, 1884 



Definition. — Pseudoceridae without dorsal papillae, or if such are 

 present they do not contain gut branches ; otherwise very similar to 

 Thysanozoon; male copulatory apparatus single or paired. 



PSEUDOCEROS MACULOSUS Pearse, 1938 



Pseudoceros maculosas Pearse, 1938, p. 85, fij?. 31. 



Material. — One whole mount, type specimen. 



Fo7vn. — Elongated oval, flat, 17 mm. long by 7 mm. wide in life; 

 dorsal surface stated to have been roughened in life by small, low, 

 conical papillae, more numerous toward the median line; these not 

 detectable on whole mount. For general appearance, see Pearse 

 (1938, fig. 31). 



Eyes. — Cerebral eyes in paired semicircular clusters close together 

 (Pearse, 1938, fig. 31D). Many tentacular eyes on medial lobe of 

 each tentacle and median region directly behind tentacles. 



Color. — Stated by Peai-se to be gray with middorsal light band 

 bordered by darker shade ; small dark spots scattered evenly over the 

 dorsal surface. 



Digestive tract. — Pharynx oval, ruffled, in anterior body third, 

 mouth central in pharynx, large main gut extends back from pharynx 

 to about one-fourth the distance from the posterior end, giving off 

 numerous (about 60) branches on each side, which anastomose to a 

 network. 



