82 DR. W. BAIRD ON THE GEPHYREA. [Feb. 13, 



The body of the animal is cylindrical in form, rather narrow in 

 the middle, and densely clathrate, presenting the appearance, to a 

 certain extent, of chain armour. The two extremities are inflated 

 and nearly smooth and shining, the longitudinal ridges being much 

 wider asunder, and the transverse sulci shallow and less apparent ; 

 the posterior extremity is a little larger than the anterior. The pro- 

 boscis is only partially excluded, hut appears short and cylindrical, 

 and is densely covered with triangular soft murications, the points 

 projecting downwards. The body is of a grey colour, and the two 

 extremities are somewhat iridescent. 



Hah. Philippine Islands (J\Ir. Ciunitig^s Collectioii). B.M. 



13. SiPUNCULUS CORALLICOLUS. 



Sipunculus corallicolus, Pourtales, Proc. Amer. Soc. Adv. Knowl. 

 18.51, p. 41. 



Hab. Florida, living in hollows in dead coral (JPourtaUs). 



Another species has been shortly described ; but, according to 

 Diesing, it requires further investigation. 



Genus 2. Phascolosoma. 



Fhascolosoma, Leuekart, Grube, ffirsted, O. Schmidt, Keferstein, 

 Costa. 



Phascolosomum, Diesing. 



Sipunculus {Phascolosomum), Quatrefages, /. c. 

 Sipunculus, Blainville, Forbes (in part), Grube (in part). 

 Sijjhuncuhts, Montagu, Gray. 

 Syrinx (part.), Forbes, M'Coy. 

 Phymosomum (part.), Quatrefages, I. c. 

 CEdematosomum (part.), Quatrefages, I. c. 

 Cryptosomum (part.), Quatrefages, I. c. 



* Species with the skin smooth. 

 (Phascolosomum, Quatrefages.) 



1 . Phascolosoma harveii f- 



Syrinx harveii, Forbes, British Starfishes, p. 249. fig., 1841 ; 

 Gosse, Rambles of a Naturalist on the Devonshire Coast, p. 157, 

 1853. 



1 Sipimculus nudus, Bosc, Hist. Nat. des Vers, ii. p. 130, 1802 

 (Syn. Bohadsch exclud.); ?Turton, Brit. Faun. p. 128, 1807. 



Siphunculus nudus, Martin, Marine Vermes, p. 4, t. 1. f. 2, 178G ; 

 Gray, Spic. Zoolog. p. 8, 1828. 



Phascolosomum harveyi, Diesing, Revis. der Rhyngod. /. c . p. 7G3, 

 1859. 



f In this sjiecies the extremity of the proboscis is Diicirclecl by a close-set 

 series of short bristles, " as if," says Mr. Gosse, " it had omitted to shave its 

 beard the day before;" and the oral cirri consist of a " dense tuft of white 

 tentacula." 



