504 A. JBJ. Verrill — Marine Planarians of Neio England. 



Mouth near or behind the middle. Largest lateral branches of 

 the stomach usually more or less lobed or forked in the adult, 

 simple in the young. Pharynx large, cylindrical. Reproductive 

 organs not fully known. Penis conical, simple. 



This genus appears to be closely related to Gunda. 



Fovia affinis (CErsted) Stimp. 



Planaria affinis (Esrted, Entw. syst. Einth. Plattwurmer, p. 54. 



Fovia affinis Stimp., Prod., p. [6] 24, 1857; Diesing, op. cit., p. 502, 1861 ; Jensen, 



op. cit., p. 74 (descr.) 

 f Vortex Warreni Girard. Proc. Boston Soc. Nat. Hist., vol. iii, pp. 264, 363, 1851. 

 f Fovia Warreni Girard, op. cit., vol. iv, p. 211, 1852 ; Stimp. Prod., p. [6] 24, 1857 ; 



Diesing, op. cit., p. 229, 1862. 

 Planaria grisea Verrill, Rep. Invert. Vineyard Sound, etc., pp. 633 [399], 487 



[193], 1873. 

 Fovia grisea Verrill, Check List Marine Invert., p. 13, 1879. 

 Fovia littoralis Verrill, op. cit., p. 13, 1879, {? non Miiller sp.). 



Plate xli, figures 9, 9a, 96. 



Body very versatile, in usual extension oblong, widest behind the 

 middle, round or subtruncate at both ends, or with the middle of 

 the front margin a little prominent, sometimes contracting into 

 broad-ovate or cordate forms. The antero-lateral angles of the 

 head are often slightly prominent, subangular or rounded, and very 

 mobile. Mouth nearly central. Principal lateral branches of the 

 stomach mostly bilobed, others simple. The posterior part of the 

 lower surface seems to be capable of being used to some extent as 

 a sucker, for the creature often moves with quick jerks, like a leech, 

 but it is not separated by any constriction from the rest of the body. 



Ocelli two, not far apart, black, reniform, with a transparent front 

 lens, each situated in a reniform white patch or spot, widest out- 

 wardly. 



Color above, yellowish, grayish, reddish, or fulvous brown, or 

 dark brown; margins and lower side paler; over the pharynx and 

 stomach is a long, pale blotch in the middle above, extending in 

 some examples the whole length of the body; the long cylindrical 

 pharynx can sometimes be seen through the integument, especially 

 beneath, extending in partly contracted specimens nearly to the 

 posterior end. Plate xli, figure Qb. 



Length 4 to 12'"'"; breadth 2 to 3"^'", in extension. 



Ten Pound I., Gloucester, Mass., in tide-pools at low-water, and 

 among eel-grass (Zostera) in the harbor, 1878; Casco Bay, Me., at 

 low- water, under stones, 1873, (var. grisea); Watch Hill, R, I., 



