338 NOTES ON SOME r.i;iTISII NUnil5HANCHS. 



the colour of its contents. The spermatotheca is very large. The 

 formula of the yellowish radula is 55 x about 60.0.60. The teeth are 

 simply hamate, and rather crowded. The outermost are degraded, but 

 not denticulate. In the anterior, but not in the posterior rows, the 

 innermost teeth project somewhat into the rliuchis, which bears longi- 

 tudinal folds. 



i^t. verrucosa has already been recorded from the British marine area 

 by Mr. G. 1\ Farran, who found one specimen at Fahy Bar, Ballynakill, 

 West Ireland {Aiin. Rep. Fish. Ireland, 190'2-o, part. ii. app. vii. 

 [1905] pp. 207-8). Bergh in his systematic arrangement of the 

 Nudibranchiata unites with it St. januarii, St. ocelligera, and St. jjseudo- 

 verrucosa, and including these varieties the species is now recorded from 

 the Mediterranean and Adriatic, the coast of Brazil, the Atlantic 

 coast of Europe, and South Carolina. 



STAURODORIS VERRUCOSA (CUV.), VAR. MOLLIS. 



One specimen, labelled Salcombe, K. A. Todd, 3. VIII. 1900. The 

 measurements are: length, 21 mm.; breadth, 12 ; height, 7. The colour 

 is white, with a faint yellowish tinge; the texture soft. The foot is 

 17 mm. long and 6 broad, with a longish free tail ; it has slight traces 

 of a groove in front, but no notch. The mantle edge " is ample, and 

 measures about 4 mm. The tentacles consist of a ridge-like prominence 

 on either side of the mouth ; they are attached for the greater part of 

 their length, and show slight traces of a fold. The back is somewhat 

 sparsely tuberculate. Down the centre run six fairly regular longi- 

 tudinal lines of large tubercles, about 15 mm. wide and 1 mm. high. 

 Between them and on the mantle edge are smaller tubercles. A few 

 tubercles near the branchise are taller and almost clavate. There is 

 no trace of ridges connecting the various tubercles. The rhinophores 

 are deeply perfoliate, and emerge between two tubercles. The rim of 

 the branchial pocket is slightly raised, and bears ten tubercles of 

 various sizes, but all quite distinct. The largest are 1 mm. high. The 

 branchiie are simply pinnate, the pinnie being alternately long and short. 

 They project about 45 mm. from the pocket, and lie flat on the back 

 like a star. Seen thus they appear to be thirteen, but on opening the 

 pocket it is seen Liiat nine are long and separate, and four small, springing 

 from the sides of the longer ones. All the [)lumes are united at the base 

 in a common circular band, wliich bears papillie outside. The anal 

 papilla is central. 



The intestines are white. In the central nervous system the cerebro- 

 pleural ganglia are above the pedal, which as preserved lie below them 

 at the side. The eyes are black and distinct. 



