1906.] OF SOUTHERN INDIA AND CEYLON. 1003 



over the rliacliis. The 2-3 outermost ai's degraded but not 

 denticulate, though occasionally jagged. 



Doris ellioti A. A; H. 



=Platydoris ellioti (A. & H.). 



Radula yellow. Formula about 40 X 100.0.100, but the teeth 

 are considerably deranged. The rhachis is narrow. The inner- 

 most teeth are low; the outermost 2-3 are degraded, and the 

 outermost of ail sometimes bears a few irregular denticulations. 

 The remaining teeth are hamate, erect, and fnirly strong. 



Doris striata Kelaart. 



— Platydoris striata (Kelaart). 



Two radulse are preserved. One is white, one yellow ; both 

 are broken. The formulfe are about 40x100.0.100 and 45 x 

 120.0.120. The teeth are rather slender, not much bent, 

 and increase from the inside. The innermost are not markedly 

 smaller, but are distinguished by their position on the rhachis. 

 The outermost present suggestions of faint irregular denticulation, 

 which, however, cannot be seen anywhei'e with certainty. 



The dentition supports the idea that this species is a variety 

 of Plat, cruenta { = arrogans) without the red markings; but see 

 my previous paper, p. 647, for the genitalia, and Bergh, Siboga^ 

 p. 139, for Pl.Jiammtdata. 



Doris picta Kelaart. 



? = Platydoris 2Jicta ( Kelaart). 



A large radula, but hidden by the thick medium in which it is 

 mounted. In consists of about 40 rows containing on each side of 

 a naiTOW rhachis 100 or more small, thin, crowded hamate teeth. 

 The outermost cannot be seen plainly, but do not appear to be 

 dentictdate or much degraded. 



This form is probably referable to Platydoris, but the genitalia 

 ai'e unknown. 



Doris exanthemata Kelaart. 



'i = Aster ouotzts hevijjrichi Ehrenberg. 



One large radula, brownish in front but otherwise white, badly 

 mounted in a gummy fluid. Formula about 35 x 55.0.55, but 

 several rows are imperfect. The teeth are thin, distinctly hamate, 

 and increase consistently up to the end of the rows, where the 

 last 2-3 become degraded but not denticulate. The innermost, 

 and to some extent the second teeth, project into the broad rhachis 

 almost at right angles to the rest. 



This dentition is compatible with the view that B. exanthemata 

 is Aster onotus liempriclvi, but Kelaart's energetic language about 

 the ugliness of the animal makes it probable that he had before 

 him if not a distinct species at least a well-marked variety. 



