Fam. 1, Plate 19. 



GONIODORIS CASTANEA, Alder and Hancock. 



G. ovata, castanea vel brunnea, albo maculata, tuberculis undique instructa : pallio parvo, margin e 

 undato, medio carinato : tentaculis labialibus latis, apicibus acuminatis : capite medio sirmato. 



Goniodoris castanea, Aid. and Hanc. in Ann. Nat. Hist. v. 16, p. 314. 



Hab. Under stones near low-water mark. Salcombe Estuary, Devonshire, J. A. Saltcoats, 

 Ayrshire, Mr. D. Landsborough,jun. 



Body three quarters of an inch long, ovate, rather broad and flattish, generally of a 

 reddish brown colour, but sometimes of a very dark brown, and rarely of a pale grayish 

 brown approaching to white ; covered with soft warty tubercles, which are conical with 

 flattened apices, and conspicuously blotched and spotted with opake white. Head warty, 

 bilobed, deeply sinuated in the centre, arched and terminating in tentacular points at the 

 sides ; a ridge runs up each side from these points to the margin of the cloak. Cloak small, 

 with an ample margin reflected upwards all round, excepting behind, where for a short 

 space it is not continuous. The margin is waved and smooth, but on the under side, where 

 reflected, especially near the branchiae, are several small, pointed tubercles. The whole area 

 of the cloak is fiddle-shaped, widening considerably towards the branchiae, and nearly 

 smooth : an elevated ridge runs down the centre of the back, and a faint transverse one 

 usually intersects it about half way down. Dorsal tentacles small, placed much forward on 

 the head, and generally thrown back when the animal is at rest, but when it is in action 

 they are much more elevated: the base is smooth and brownish, with three or more 

 longitudinal interrupted lines of white, above which there are ten or eleven broad laminae 

 of a brown colour, blotched with darker brown and white, coming to a peak behind, but not 

 reaching to the front of the tentacle, which is smooth : the apex is a small cylindrical 

 style, truncated at the top, and blotched with opake white. Branchice large, consisting of 

 seven or nine plumes, forming nearly a complete circle round the anus. The plumes are 

 dark purplish brown spotted with white, tripinnate, and frequently divided into two 

 branches at the top. A waved tuberculated ridge extends from the termination of the cloak 

 to the tail, which is rather obtuse. Foot broad, extending much beyond the cloak, and 

 having the upper part strongly tuberculated and blotched with opake white. It is deeply 

 notched under the mouth in front, and rounded at the sides : the colour of the under side is 

 yellowish, with a tinge of purple, and sprinkled with minute white and brown spots, the 

 liver appearing indistinctly through the centre of a dark purple colour.- 



We discovered a single specimen of this very distinct and interesting Goniodoris in the 

 summer of 1845, under a stone at low-water mark near the rains of Salcombe Castle, 

 Devonshire. Since then it has been found more plentifully at Saltcoats, on the Ayrshire 

 coast, by our young friend, Mr. David Landsborough, jun., to whom we are indebted for 



