TUBBELLARIA 



167 



3. Phagocata Leidy. Body elongate and flat, with a rounded head 

 end and a blunt tail end; many pharynges present which lie in a com- 

 mon chamber and when extruded reach the exterior 

 through a single orifice, but which open separately into 

 the intestine: 1 species. 



P. gracilis* (Haldeman) (Fig. 270). Body 30 mm. 

 long and 4.5 mm. wide or less, black in color; 1 large 

 pharynx present at the junction of the 3 main intestinal 

 trunks and about 22 additional phaiynges which are 

 joined to the 2 lateral trunks: eastern states, often 

 plentiful in brackish water. 



Suborder 2. MARICOLA.f 

 Marine triclads. Intestinal branches but little rami- 

 fied ; mouth in hinder half of body ; uterus behind genital 

 pore: 5 families and about 30 species, which live on 

 seaweed, stones, or shells, or are parasitic; 10 species on 

 east coast of America. 



Fig. 270 



Phagocata 



gracilis 



(Wood worth). 



1, pharynges 



2, intestine. 



Family 1. PROCEEODIDAE. 

 Body flattened, with otocyst but no sense pits; front 

 end more or less truncate, often with a pair of ten- 

 tacle-like projections; 2 eyes, at some distance from front end: 2 genera. 

 Pkocerodes Girard {Gunda 0. Schmidt). Body elongate, truncated 

 in front with projecting, tentacle-like corners: 16 species. 

 P. wheatlandi Girard (Fig. 271). Body elongate, 5 

 mm. long and 1 mm. wide, blackish in color; tentacles 

 whitish : coast of New England, often common under stones 

 and among algae in shallow water ; Europe. 



P. warreni (Girard). Front end more or less trun- 

 cate; body elongate, yellowish or brownish in color, 4 to 12 

 mm. long, and 2 to 3 mm. wide: New England coast; not 

 common. 



Family 2. BDELEOURIDAE.t 

 Body elongate and flattened and colorless; 2 eyes present; rhab- 

 dites absent; 2 uteri present with independent openings to the outside; 



* See "Contributions to the Morphology of the Turbellaria," by "W. M. Wood 

 worth, Bull. Mus. Comp. Zool., Vol. 21, p. 1, 1891. 



t See "Marine rianarians of the New England Coast," by A. E. Verrill, Trans. 

 Conn. Acad., Vol. 8, 1893. "Tricladensstudien I. Tricladida maricola," by L. Bohraig, 

 Zeit. f. wiss. Zool., Vol. 81,. p. 344, 1906. "On the N. A. Marine Triclads," by 

 J. Wilhelmi, Biol. Bull., Vol. 15, p. 1, 1908. "Tricladen," by same, Die Fauna u. 

 Flora d. Golfes v. Neapel, 1909. 



i See "Syncoelidium pellucidum," etc., by W. M. Wheeler, .Tour. Morph., Vol. 9, p. 

 167, 1894. 



