73 



ASTERIAS AURANTIACA. Forbes, p. 130. It is so 

 rare that I had never seen a specimen, until at the Meeting 

 of the British Association for science, Mr. J. C. Bellamy 

 produced one taken in Whitsand-bay. It is common in 

 Plymouth-sound ; and I obtained a few specimens from the 

 Breakwater. 



OPHIURA BRACH1ATA, must be omitted, until dis- 

 covered anew. 



The following are ascertained Cornish species of Holo« 

 thuriadae : 



CUCUMARIA PENTACTES. Forbes, p. 213. 



SYRINX NUDUS, Forbes, p. 245. 



SIPUNCULUS BERNARDI. Forbes, p. 251. 



THALASSIMA NEPTUNI. Forbes, p. 259. A species 

 of common occurrence from deep water, inhabiting per- 

 forations of stone, which it enters apparently for the 

 purpose of devouring the animal of the shell-fish within. 

 Species remaining for examination are chiefly of the genus 

 Cucumaria; together with one closely allied to the genus 

 Psolus of Mr. Forbes. A notice of it was sent to that 

 Gentleman, but too late for publication in his history of this 

 family. It was judged by him to be worthy of generic 

 distinction, which is thus marked : under surface extending 

 through the length, and covered with thickly set suckers, 

 not in distinct rows. Upper surface covered with tuber- 

 cles, each with an orifice, from which at will is protruded 

 a cartilaginous point. Tentacula at the end 18, with club- 

 shaped foliations on slender stalks. 



The specimen was about six inches long, and of the size 

 of an ordinary mould candle. Upper surface dark blue; 

 centre of each tubercle light, enclosing a dark point, and 

 round the whole a light purple ring. After death these 

 tubercles sunk and disappeared; so that without pressure 

 they could scarcely be perceived. At that end of the animal 

 opposite the tentacula is an orifice, with a small blunt por- 

 truding process; which seems in constant, though slow, action, 

 producing a slight eddy in the water. When alive this 

 creature had a line along its dorsal surface, narrow but free 

 of tubercles; and something similar but shorter, on each 

 side; both disappearing when the animal contracted, and 

 after death. If it be allowed that this creature is entitled 

 to form the type of a new genus, I would propose for it the 

 name of Forbsia, in honour of the Natural Historian of the 

 British Echinodermata. 



In this place I would insert an account of an animal, of 

 which a figure was submitted to the inspection of the most 

 eminent Naturalists and comparative Anatomists, at the 



