336 PROCEEDINGS OP THE AMERICAN ACADEMY. 



Guttulinopsis vulgaris nov. sp. 



Sori usually stalked, sometimes sessile, about 150^-500/* in height 

 X 150//.-4.CKV broad. Fructifications varying in color from whitish to 

 dirty yellowish according to the character of the substratum and the dry- 

 ness of the sorus. Pseudospores usually irregularly spherical, about 4/z- 

 8p in diameter. 



On dung of horse, cow, pig, mouse, etc. Cambridge, Mass ; Alabama j 

 Indiana ; Maine ; Porto Rico. 



This form, which has conspicuous fructifications so large that they 

 may be readily seen with the naked eye, lias been met with very fre- 

 quently on fresh cultures of various kinds of dung. Although Guttulina 

 aurea Van Tieghem may prove to be identical with the ahove species, 

 the fact that, according to the original description, it possesses resting 

 bodies which are characterized as " spores," having a golden yellow color, 

 renders it improbable that the two forms are the same. 



Guttulinopsis stipitata nov. sp. 



Sori yellowish white, long stalked, the stalk composed of individuals 

 similar to those of the head. Sorus about 1 mm. -1.2 mm. high; the 

 stalk about 800/a long, the head 250/* in diameter. Pseudospores spher- 

 ical, 3^-5^ in diameter. 



On dung of dog. New Haven, Conn. 



This species, the largest representative of the genus, has been met 

 with but once, and is founded on a mounted specimen and dried material 

 collected at New Haven some years ago by Dr. Thaxter. 



Guttulinopsis clavata nov. sp. 



Sori yellowish white when young, comparatively long-stalked, the stalk 

 composed of a column of slightly elongated individuals surrounded by 

 mucus. The stalk-cells held within the peripheral mucus adhere together 

 after the deliquescence of the pseudospores of the head, forming at the 

 apex a rounded or conical columella of elongated adherent cells. Sorus 

 about 400 i u-800 i u in height, the stalk about 170^-250//. long, the head 

 I00 ( u-400 i u in diameter. Pseudospores of the head somewhat broadly 

 oval, 3//.-4/A X 6// - 7/a, or spherical, then 4^-5//. in diameter ; those of 

 the stalk about 3fi-Ofi X 7/j-10ix. 



On dung of dog. Cambridge, Mass. ; Indiana. 



This distinct species is frequently met with in fresh cultures of the 

 dung on which it has its habitat. The base of the stalk is often imbedded 



