A. E. Verrill — Marine PImiarians of JVew England. 503 



Two rather conspicuous glandular organs or " uterine sacs " [x) 

 are situated to the right and left of the genital orifice. Each one 

 is connected with the genital duct by a convoluted tube. The func- 

 tion of these organs was not clearly ascertained, but they probably 

 are of the same nature as the so-called " uterine sac " of other tri- 

 cladial planarians, which serves in part as a sperraatheca or seminal 

 receptacle and in part as a shell-gland. In this genus their principal 

 function is probably the secretion of the materials for the formation 

 of the strong, chitinous egg-capsules. 



Family, Planarid^e. 



Body depressed, more or less elongated, often oblong or long- 

 lanceolate in extension. Head sometimes broader than the body, 

 often with its lateral or antero-lateral maigins a little produced into 

 points or angles, or somewhat auriculate. Tentacles sometimes pres- 

 ent, usually absent. 



Ocelli commonly a single anterior pair, with a frontal lens-like por- 

 tion and a reniform pigmented body; sometimes three or more pairs; 

 sometimes absent. 



Pharynx single,* tubular, usually cylindrical; mouth central or 

 subcentral. Lateral intestinal branches simple or dichotomously 

 divided. 



Eggs commonly laid in capsules. Some species are viviparous. 

 Fluviatile and marine. 



F'OVia Girard; Stimpsou, emend., 1857. 



Fovia Girard, Proc. Boston Soc. Nat. Hist., iv, p. 211, 185'2; Stimpson, Prodromus, 

 p. vi, 1857; Diesing. op. cit.,. Dendroc, p. 501, 1862; Jensen, Turbellaria ad 

 Litora Norvegise. p. 74, 1878. 



Body depressed, oblong or long-elliptical in extension, changeable; 

 back a little convex, ventral side flat, the posterior part most muscu- 

 lar. Front of head often slightly produced and angular; sides of 

 head rounded, at other times a little prominent or angular. 



Ocelli two, anterior, rather large, with front lens and reniform 

 pigmented body, each usually surrounded by a pale spot. 



* The fluviatile genus PJiagocata Leidy is here excluded from this family. It 

 should be the type of a special family {Phagocatidoi) characterized by the presence of 

 numerous secondary lateral pharynges, besides the median central one, and by 

 several other peculiarities of structure. (See detailed description of its anatomy and 

 histology by W. M. Woodworth, in Bulletin Museum Comp. Zool., vol. xii, pp. 1-44, 

 pi. i-iv, 1891.) 



