1906.] OF SOUTHERN INDIA AND CEYLON. 647 



Doris scahra, referable to the genus Platydoris. The drawing, 

 which is not reproduced, leaves but little doubt of this. 



Platydoris striata (Kelaart). 



Kelaart, 1. c. I. p. 302. 

 (A. & H. 1. c. p. 117.) 



A single specimen is preserved in bad condition, having appa- 

 rently been allowed to dry before being put in fresh spirits. 



As preserved, it suggests that the colour was lighter than in 

 Alder and Hancock's plates, and the fine brown lines, though 

 distinct, much fewer. 



The buccal mass had apparently been extracted, but a few 

 scattered teeth were found among the internal organs. They are 

 hamate and rather slender. 



Little could be made out of the genitalia, which were small and 

 hardened. A tube lined with the characteristic yellow folds and 

 lumps was found, but no scales or hooks. It is very probable 

 that they are really present, but Bergh (' Siboga,' p. 138) reports 

 that in PI. Jlammulata the male organs are provided with a 

 " Langsfalten bildenden Cuticula mit spitzen und gerundeten 

 Hockern versehen aber ohne die gewohnlichen Dorntragenden 

 Scheiben." It is therefore possible that they may be absent in 

 this species too. 



Platydoris ellioti (A. & H.). 



(A. & H. 1. c. p. 116. Discodoris ellioti Bergh, Siboga, p. 102.) 



Three of Alder and Hancock's type specimens are preserved. 

 One is quite hard, and was probably dried before it was put into 

 spirits. Nothing could be made of it. 



The other two are soft and somewhat decayed. The texture is 

 not that usual in Platydoris, but the present flaccid condition may 

 be due to decomposition. The buccal parts had been removed from 

 one specimen but remained in the other. No labial armature was 

 found, but a number of yellowish hamate rather slender teeth, set 

 in no apparent order, the ribbon of the radula being decomposed. 



The armature of the genitalia is very distinct. The efferent duct 

 is thickly covered with discs bearing spines of the form typical of 

 the genus. The spines are mostly stout and straight ; some are a 

 little inclined, but not bent. There is no doubt of the existence 

 of this characteristic armature, but owing to bad preservation it 

 is hard to say if it is on the vas deferens or the vagina, but 

 probably the former. 



Bei'gh originally placed this species under Platydoris (Syst. d. 

 Nud. Gast. p. 1102), but subsequently {I. c.) identified it with a 

 Discodoris obtained by the ' Siboga ' from Makassar. It would 

 appear, however, that the earlier classification was correct, for 

 the genitalia are armed as in Platydoris and there is no labial 

 armature. The absence of the latter is confirmed by Alder and 

 Hancock's description, for under D. ellioti they say " Tongue as in 



