SIi*^ A. E. VerriU — Marine Planarians of New England. 



Figure 4a. — The same specimen. Brain snd clusters of ocelli ; x 25 ; t:, brain ; e, 

 cerebral ocelli; e', dorsal ocelli ; g, g, anterior branches of the stomach. Fig. 46, 

 cerebral ocelli of the same specimen ; x 25. 



Figure 5. — Trigonoporus folium V., ja. 487. Ventral view of a specimen mounted in 

 balsam; x 6. Eastport, Me., 1870. Fig. 5ff, ocelli of the left side of the same 

 specimen, x 20 ; e, cerebral cluster ; e', dorsal cluster. Fig. 56, ocelli of the right 

 side of the same specimen ; x 25 ; e, cerebral cluster ; e' dorsal cluster. 



Figure 6. — Discocelis mutahilis V., p. 493. Dorsal view of the original, type-speci- 

 men mounted in balsam ; x 8. Thimble Islands, 1872. 



Figure 6a. — The same specimen. Clusters of ocelli ; x 25 ; e, cerebral, and e', dorsal 

 clusters of ocelli. 



Figure 7. — Discocelis mutahilis V. (?), young, p. 494. Dorsal and cerebral ocelli of a 

 mounted specimen; x 25. Wood's Holl, Mass., 1882. 



Figure 8. — Ajyhanostoma dialers i color ((Erst.), p. 509. Dorsal view of a living speci- 

 men; x20. Newport, R. I., 1880. 



Figure d.—Aphanostoma olivaceumY., p. 510. Ventral view of a living specimen; 

 xl2; ot, otocyst; gr, digestive cavity containing an amphipod crustacean; u, 

 large oviduct containing ripe ova ; ? , female orifice , ?i , male orifice and penis. 



Figure 10. — Aphanostoma aurantiacum V., p. 509. Dorsal view of a living speci- 

 men; X 20. 



Figure 10a. — The same specimeo. Otocyst; more enlarged. 



Figure 11. — Procerodes ulinx. (CErst ), p. 506. Dorsal view of head of a living speci- 

 men; X 12. Casco Bay, Me., 1873. 



Figure 11a. — The same. Dorsal view of another specimen mounted in balsam; x8; 

 o, ovaries; /, pharynx; p, penis; 2 5, common genital orifice. (In thi.«? figure 

 the number and form of the gastric branches are partly diagramatic, for many of 

 them could be seen only indistinctly). 



Figures 1, la, 2, 2a, 4, 4a, 5, 6 were drawn from nature by A. H. Verrill ; 8 and 

 10 were drawn from life by J. H. Emerton; the rest are camera-lucida drawings by 

 the author. 



Plate xliii. 



Figure 1. — Leptoplana virilis V., p. 478. Ventral view of the type-specimen, stained 

 and mounted in balsam; x 6. Sta. 307, Off Cape Cod, Mass., 31 fath , 1879. 



Figure la. — The same specimen. Posterior portion, ventral view : x 15 ; /, pharynx; 

 r, semmal vesicle ; /r, granular gland and penis-bulb; j), penis; q. penis-sheath; 

 t, t, spermarian folicles or testes : $ . male orifice ; S , female orifice ; o, o, o, 

 ovarian folicles; w, ventral portion of vagina; «/, dorsal portion of the same; s, 

 spermatheca; «', anterior portion of the same and its connection with the vagina ; 

 w, shell-glands ; m, one of the uterine sacs. 



Fio-ure 2. — Leptoplana variabilis (Girard) V., young, p. 480. Dorsal view of a 

 mounted specimen; x S. Gloucester, Mass., in tide-pool, 1878. 



Figure 3. — Leptoplana variabilis (Girard) V. No. 20. Ventral view of a mounted 

 specimen; x 6. Sta. 156, off Cape Ann, Mass., 42 fath., 1878. 



Figure 3a. — The same specimen. Genital organs, dorsal view; xl5; d, d, vasa 

 deferentia ; k, granular gland ; p, penis , q, penis-sheath ; ? , female orifice ; v, 

 ventral portion of vagina ; v', dorsal portion of the same ; s, spermatheca ; 5', an- 

 terior division of the same and its connection with the vagina; w, iv, shell- 

 glands ; M, u, large oviducts or uterine sacs ; u% duct of the same leading to the 

 vagina ; x, orifice of the uephridial duct (?) ; g', g', posterior gastric branches. 



