380 SIR C. ELIOT ON XUDIBRAXCHS [DeC. 1, 



of the radula of Aste^'onotus bertrana S. R. plate Ixviii. fig. 9). 

 The male repi-oductive oi'gans are armed with two rows of hook- 

 bearing disks, each disk set at some distance from the next one. 

 There appeax-s to be an accessoiy gland on the female branch like 

 the glandula amatoiia of Asiero?iotus, but no hasta was discover- 

 able. The central nervous system is much concentrated ; above 

 it anteriorly and posterioi-ly lie the two very distinct divisions of 

 the blood-gland. 



This species seems in many ways intei-mediate between Platy- 

 doris and Asteronotus. But as it has the characteristic genital 

 armature of the foi'mer, and as one of the pi-incipal characters of 

 the latter is that the back is quite smooth and neither granulate 

 nor papillous, I have thought it better to refer my specimens to 

 Platydoris. 



The chief specific charactei- is no doubt the branched doi-sal 

 papillae. I think it pi'obable that this animal is identical with 

 the Doris soixlida of Quoy & Gaimard from Maviritius, but as 

 neither their description * nor their plate shows the branched 

 papillfe, identification is impossible. 



25. ScLERODORis OSSEOSA (Kelaart). 



[See Kelaart, " On new Sjjecies of Ceylonese Mollusca," in 

 Annals & Mag. of Nat. Hist. vol. iii. 3rd ser. p. 298, 1859 ; and 

 Alder & Hancock, " Notes on a Collection of Nudibranchiate 

 Mollusca made in India," Tr. Z. S. iii. 1864, p. 121.] 



Thi'ee specimens from the neighboui'hood of Wasin. The notes 

 on the living animals are unfortunately not foi'thcoming. 



The alcoholic specimens vary in colour fioin pale yellow to 

 greyish brown. They are hard and rough to the touch like Platy- 

 doris. The largest is 3'8 centimetres long, 2-2 broad, and 1*2 high. 

 In all the specimens there is an indistinct dorsal I'idge, and the 

 back is irregularly reticulate and honeycombed ; but while these 

 markings extend over the entii'e upper surface in two specimens, 

 they are confined to jmtches in the third. In all three there 

 is one pit, larger and more conspicuous than the others, and 

 surrounded by a pi-otuberance in front of the gills. The mantle- 

 brim is wide, and extends about 5 mm. beyond the head and tail. 

 The ihinophore-openings aie somewhat raised and closed by 

 valve-like crenulations. The rhinophores are conical and not 

 much bent back ; the peifoliations cease before the tip. The 

 branchial pocket lies at the end of the doi'sal lidge and has raised 

 edges ; it is directed somewhat backwai-ds and is crenulate. The 

 branchiiB are six or seven, with the stem very large compared with 

 the scanty perfoliations, which are bi- and sometimes tripinnate. 

 The long and naii-ow foot is grooved and notched anteiioi-ly. 

 The tentacles are small, white, and conical. There is a strong 

 bluish labial cuticle without any armature. The radula consists 

 of about 40 rows, containing about 45 simply hamate teeth on 



* Unless this fbiiture is mraiit to be included uiidtr the observation "Cette cspece 

 a un pru la t'ormc d'unc Onchidic." 

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