ßjß Dritter Abschnitt. Systematik. 



hody is without a distinct head or tentacles, but notclied , and appareiitly folded ; oii tlie left side of the 

 notcli appeared a teutaculiform process tipped witli a black spot, and h.aving also two or tliree small black 

 Specks in its neighbourhood. Eye-specks in a hippocrepiform congeries immediately anterior to tbe pink 

 median line: the spots few, and larger than nsual compared with tbe smallness of the animal. Moves slowly, 

 crawling like a slug. Between tide-marks under stones westward of Singapore Harbour in November.« 



224. Polycelis mutabilis Verrill. 

 Verrill 1873. 111. pag. 746—747. 



»Body much depressed, thin, changeable in form, often elliptical or oval, freqiiently broad and 

 emarginate in front, and tapered posteriorly. Marginal ocelli minute, black, forming several rows along the 

 front border, but only one row laterally. Dorsal ocelli larger, forming three pairs of rather ill-defined 

 Clusters ; the outer Clusters are largest, convergent backward ; a pair of smaller Clusters are situated a little 

 in advance, and nearer together; the third pair is a little farther forward and closer together, often more 

 or less confused with tliose uext behind them. Color, yellowish brown, darker centrally ; or pale yellowish, 

 thickly specked with yellomsh brown. Lengtb, about 7 mm to 9 mm, breadth 5 mm to 6 mm. 



Thimble Islands, 1 to 2 fathoms, among algae.» 



225. Penula punctata Kelaart. 



Penula punctata, ') Kelaart 1858. 80. pag. 138. 



Leptoplana ? punctata. Diesing 1862. 89. pag. 542. 



Centrostomum punctatum, -) Collingwood 1876. 116. pag. 97. Tab. 19. Fig. 28. 



1] Character der Gattung Penula, siehe bei Art Nr. 215 S. 613. 



2) »Length 1^4 inch. Upper surface white, shaded and miuutely punctated with reddish brown. Under 

 surface very delicate white, clouded with faint reddisch brown. Trincomale, Ceylon. Great ressemblance 

 to the Planaria gigas, Leuckart.« 



226. Typhlolepta Byerle[yana Collingwood. 



Collingwood 1876. 116. pag. 92—93. Tab. 17. Fig. 8. 



»Length ^'^ inch, breadth ^/^ inch. Body smooth, thin, and the lateral parts very ample and puckered. 

 Upper surface beautifuUy marbled with ligt-brown rings including roundish Spaces of a whitish colour, 

 smaller rings being between the interstices of the larger; most crowded and darkest in colour along the 

 median line, paler and more delicate towards the sides. Under surface of a pale grey, the dendritic marking 

 in the centre of an opaque white. Under a piece of coral on Pulo Barundum, off the west coast of Borneo. 

 October G"". Movements very contorted, without much activity. 



Die undurchsichtig weisse, dendritische Zeichnung in der Mitte entspricht jedenfalls 

 dem Pharynx. 



