ELIOT : NUDIBRANCHS FROM THE INDO-PACIFIC. 253 



23. PI. incerta Eliot. 



24. PI. (?) papillata Eliot. 



25. PI. herdmani Farran. 



26. PI. (?) spinulosa Farran. 



27. PI, townsendi sp. nov. 



A good many of the above species are incompletely described, and 

 those marked with ? possess features not altogether in accord with 

 the characters of the genus. 



Platydoris townsendi sp. nov. (PI. V., fig. 4). 



One specimen dredged in 180 fathoms off Ras Maidani.^ When 

 first dredged the animal is said to have been hard and horny, and 

 apparently dead. After being kept in water for some time, it put 

 forth branchiae and rhinophores, and felt softer. A sketch accompany- 

 ing these notes depicts a fiat pinkish Dorid, with an undulated margin 

 and three rows of darker spots of pinkish brown. The rhinophores 

 and branchiae are also pinkish, the latter spotted, and six or seven in 

 number, set in circle open behind. 



As preserved, the specimen is horny 'but flexible, with the dorsal 

 surface finely granulated. The length is 52 mm., and the breadth 34 

 mm. The mantle edge is wavy and ample, measuring 1 1 mm at the 

 sides, 9 mm. over the head, and 5 mm. over the tail. The colour has 

 become a whitish yellow with reddish brown spots of irregular shape, 

 very much darker at the edges, so that they have an annulate appear- 

 ance. They are arranged in three rows, of which the median contains 

 one behind and three in front of the branchite (the foremost being 

 between the rhinophores), the left hand row four, and the right hand 

 row only two. There are also faint traces of spots round the margin. 

 The spots are due to the interstices between the dorsal granules being 

 filled with red pigment, the tips of the granules remaining yellow. 

 This red pigment can be scraped off. The underside of the specimen 

 is pure yellow. 



The tentacles are rather long and digitate. The foot is grooved 

 and notched in front, but not widely expanded at the side of the 

 notch. The edges of the rhinophorial and branchial pockets are 

 slightly raised and irregularly crenulate. The rhinophores are large, 

 yellow with a few reddish dots and thickly perfoliate. The branchi;3e 

 are also yellow, spotted with reddish brown, six or seven in number, 

 according as a branch on the right is regarded as a separate plume 

 or not. 



The labial cuticle contains a few rods, but nothing which can be 

 properly called a labial armature. The formula for the radula is 

 about 102 X 120. o. 120. The teeth are longish and simply hamate, 



I Apparently opposite Maskat, between Chahbar and Jask. 



