Dr. M. Scbultze on the Terrestrial Planarise. / 



trial Planaria, The former* received specimens preserved in 

 spirits of a species observed in Chili by Claude Gay; these he 

 made use of for anatomical investigations which will be here- 

 after referred to. Blanchard named the species Polycladus Gayi, 

 The generic name cannot be extended to all terrestrial Planaria, 

 and remains attached provisionally only to this species. The 

 same is the case with the name Rhynchodemus, given by Leidyf 

 to a North American terrestrial Planaria, 



Darwin^s terrestrial Planaria are as follow % : — 



14. Geoplana vaginuloides. 19. Geoplana pallida, 



15. G. elegans. 20. G. elongata, 



16. G, pulla, 21. G. semilineata. 



17. G. bilinearis. 22. G. maculata. 



18. G. nigrofusca. 23. G. Tasmaniana. 



Of these species described by Darwin, some, most probably, 

 agree with those observed by F. Miiller. Thus the G. elegans 

 of the latter may sink in the G. vaginuloides, Darwin, and the 

 G. pulla, Darwin, may be identical with G. olivacea or Maxi- 

 miliani, Miiller. A final decision could only be furnished by 

 figures, which, however, are not given by Darwin, nor as yet 

 by F. Miiller. If the two first-mentioned species should prove 

 to be distinct, Miiller^s G. elegans must receive another name, 

 as this has already been given by Darwin to another species, 

 referred to above under No. 15. In any case, however, Miiller's 

 name pallida must be changed, as Darwin's species of the same 

 name has the right of priority. From its pure white colour 

 the latter might remind us of the G. subterranea, if the strongly- 

 marked absence of the eyes did not sufficiently show the right of 

 the form living under ground to rank as a distinct species. 



The two above-mentioned species, described by Blanchard and 

 Leidy as coming in addition to the 23 already referred to, are : 



24. Geoplana {Polycladus) Gayi, Blanchard. Blackish-green 

 on the back, with a white median line ; the margin with a broad 

 orange border, which is bounded by two narrow black lines ; 

 ventral surface orange. 



Length 85-90 millimetres ; breadth about 30 millimetres. 



Hab. Chili, in moist places on the ground. 



* Historia de Chile p. Claude Gay, Vers, pi. 1. fig. 2 (which I have been 

 unable to consult) ; Ann. des Sci. Nat. 3 ser. viii. p. 140. 



t Proceedings of the Academy of Natural Sciences of Philadelphia, 

 vol. V. 1850-1851, pp. 241 & 289. 



X [The author has translated all Darwin's descriptions, which, however, 

 we have omitted, as they were originally published in this Journal, loc. cit. 

 supra. He has substituted Dr. Miiller's generic name, Geoplana, for that 

 of Planaria, under which Mr. Darwin described his species. — ^^Ed.] 



