and Planarians of New England. 533 



Planocera nebulosa Gr'd, p. ] 91=Do. Yer., vol. viii, p. 92 (subgenus Planoceropsis). 

 Imogine oculifera Gr'd, p. 192 = Do. Ver., vol. viii, p. 475. 



Stylochopsis zebra Ver.; Gr'd, p. 193=Stylochus zebra Ver., vol. viii, p. 463. 

 Stylochopsis lateralis (error for littoralis Ver.): Gr'd, p. 194=Eustyloclius 



ellipticus Yer., vol. viii, p. 467. 

 Procerodes Wheatlandii Gr'd, p. 197=Procerodes ulvae Yer., vol. viii, p. 506. 



This genus belongs with the Tricladidea. Dr. Girard states that 

 the Planaria idvce CErst. and P. frequens Leidy belong to the 

 Rhabdocoela. This is certainly not the case with the latter. Recent 

 European writers have also referred P. ulvce to the Tricladidea. 

 The best descriptions of the latter agree closely with our species. I 

 believe the three forais are identical, but a fuller comparison is 

 needed. 



Euplana gracilis Gr'd, p. 198, pi. vi, fig. 62 = ?Prosthiostoniuni gracile (Gr'd) 

 Yer., vol. viii, p. 496. 



Dr. Girard's figure illustrates only the arrangement of the ocelli. 

 In this respect his figure does not agree precisely with my own. 



Whether the two are identical is doubtful. The characters given 

 for the proposed new genus, Euplana, are wholly superficial and of 

 little value ; nor is there anything in the description to indicate 

 even the family to which the species belongs. It is to be hoped that 

 specimens agreeing with Dr. Girard's original type may be redis- 

 covered. Since my former article was printed I have obtained from 

 near New Haven several additional specimens of the form described 

 by myself, but all were immature and essentially like the one figured 

 by me. They varied somewhat in color. 



Leptoplana variabilis Gr'd, p. 199 — Do. Yer., vol. viii, p. 486. 



Leptoplana ellipsoides Gr'd, p. 200 =Do. Yer., vol. viii, p. 483. 



Leptoplana folium Yer.; Gr'd, p. 201=Trigonoporus folium Yer,, vol. viii, 



p. 487. 

 Fovia Warreni Gr'd, p. 225=rovia alB&nis var. Warreni Yer., vol. viii, p. 505, 

 Bdelloura Candida Gr'd, p. 2*27 = 00. Yer., vol. viii, p. 499. 



In my former article I have shown that Planaria limuli Graff, is 

 identical with this species. Although living on a Litnulus in the 

 Frankfort aquarium, the Limulus was doubtless the American 

 species, and not a native of the North Sea, as Dr. Girard supposed. 

 This species is a genuine parasite, as I have previously explained, 

 and not a mere commensal, as Dr. Girard states. The Bdelloura 

 rustica Leidy is probably only the J^oung of this species. 



