668 General Notes. 
two groups is not held to apply to the Pneumatophore (“ Pneu 
matophoride” Chun), nor to the Discoideze.— F. Walter Fewkes. 
NOTE ON ALAURINA PROLIFERA Buscu.—The rich pelagic fauna 
of New England waters contains many genera and species 
marine Turbellaria which have not been studied by American 
zoologists. The accompanying sketches of Alaurina do not add 
EXPLANATION OF THE FIGURES. —Fic. t angie asexual AY 1 peso = 
- agar e — estitute of constrictions. Ther ere is a non-cilia 
6 
inal posterior spine ; the 7 ps cili ate 
single constriction E: this A 4 was fou f wimming an nd in nate next rs 
larv 1, or the eito ` > two arias which are e unit ; 5 was ; 
sie Fis G. - 3. ~—The oldest spec of an asexual Alaurina whic terior and 
in this m we have a deep ioe Ba n (4) midway aie the gg and the 
terior etetem es of the body; this esenteiction has been see pof the two wa 
two worms to separate from each other at that point; the post two small, 
represented as united in Fig. 3, has four eye-spots, two large an of the W 
the sma l r 
bosci vie h A 
which is pers with small ek Ri fee Sanaat whic ions d, terminal 
divide the asexual Alaurina into t worms ; ¢, shallow on eofw 
posterior aide: m, mouth (cilia sted. “There is no vent. 1.5, 
resented in Fig. 3; s, lateral “spines,” 
