512 nvitter Abschnitt. Systematik. 



of an opaqiie whitisli colour, tlie deudritic maiking occupying the middle third, of an opaque white, and 

 surroundcd with dots of tlie same. Eye-spots irregulär and indistinet, consisting of an oval ring at tlie 

 anterior part of the median line, and on either side an irregulär patch, that on the left roundish, and on 

 the right crescentic. These spots when magnified appear roundish, hut not cireular, Jind do not present 

 any regulär figure. This animal moves with a leech-like niotion , fixing itself by its anterior and posterior 

 ends altcrnately. It showed no inclination to swim or float like most of the Planarians, nor even to leave 

 the hottoui of the vessel of water in which it was contained. Two speciniens from under the mantle of a 

 large limpet (Patella oculus). Simon's Bay, Cape of good Hope, May.« 



100. Elasmodes obtusus CoLLiNfiWooD. 



CoLLiNGwooD 1876. 116. pag. 93. Tab. 18. Fig. 9. 



»Length ''/,„, breadth 1/5 inch. Body tliin, delicate, sniooth, seniitransparent, dendritic. Upper sur- 

 face pale brown, with a dark, shaded brown streak along the middle half of the median line, from which 

 radiate delicate pale brown markings, which fade as they reach the margin. Under surface pale, and ex- 

 hibiting the radiating markings, though fainter. Head indistinet. Eye-spots two, somewhat crescentic, si- 

 tuaded upon a round , white , transparent Space immediately in front of the median dark brown streak. 

 Swims rapidly by a vertical movement of the sides of the body, which is perfornied by quick and sudden 

 jerks. One specimen from Singapore Harbour, west of the town, from beneath a stone betweeu tide-marks. 

 December.« 



101. Leptoplana folium Verrill. 

 Verrill 1873. 112. pag. ') 632— 633, 2)487, ^) 488, ^) 498, ^)505, «)512. 



1) «Body very flat, with the margin thin and undulated; outline versatilc, usually cordate or leaf- 

 like, broadest and emarginate posteriorly, the posterior borders well rounded, and the side a little convex, 

 narrowing to an obtuse point at the anterior end; sometimes oblong or elliptical , and but little narrowed 

 anteriorly; the posterior emargination is usually very distinct, often deep, and sometimes in contraction lias 

 a small projecting angular poiut in the middle, but at times the emargination uearly disappears. Ocelli 

 in füur groups, near the anterior end; the two posterior Clusters are smaller than the anterior and wider 

 apart; the anterior Clusters are very near the others, and close together, allmost blending on the median 

 line, and are composed of numerous very minute crowded ocelli, less distinct than those of the other 

 Clusters. Color pale yellowish llesh-color, veiued with dendritic lines of darker flesh-color, or with whitish: 

 an indistinet pale reddish spot behind the anterior ocelli; an interrupted longitudinal whitish stripe in the 

 middle, due to the internal organs, and a small median whitish stripe posteriorly. 



Length 20 mm to 25 mm, breadth 10 mm to 15 mm. 



Off Watcli Hill, 4 to fathoms, among rocks and algae; of Block Island, in 29 fathoms; off Buz- 

 zard's Bay, in 25 fathoms.« 



2) Leptoplana folium »creeps over their (stones) lower surfaces.« 



3) Angeführt in der «List of species found on the outer rocky shores.« 



4) Angeführt in der »List of species inhabiting the stony and rocky bottoms on the open coast.« 



5) Angeführt in der «List of species inhabiting sandy and gravelly bottoms.« 



6) Angeführt in der »List of species inhabiting bottoms composed of soft mud and sandy miul off 

 the outer coast.« 



102. Leptoplana ellipsoides Girard. 

 ') Girard 1854. 70. pag. 27 u. 28. Tab. II. Fig. 16. — Stimpson 1807. 78. pag. 3. 

 DiEsiNG 1862. 89. pag. 533. 



