18G8.] DR.W. BAIKD ON THE GEPHYREA. 11 



Helminth, torn. ii. p. 59, 1851; Revis. der K,hyngod. in Sitzungs- 

 bericbte dcr kaiserlichen Akad. derWisseuscliaft. Band xxxvii. p. 75 1 , 

 1859. 



Order I. GEPHYREA INERMIA. 



Gephyrea inermia, Quatrefages. 



Sipunculidea acrostomuta, Diesing, Revis. der Khyngod. 



Sipuncididoi, Keferstein. 



Family I. Sipunculid^. 



Sipunculea, Quatrefages, 1865. 

 Sipunciclacea, Brandt, 1835 ; Keferstein, 1865. 

 Eusipunculidea, Exaspidosiphones, Diesing, Revis. der Rhyngod. 

 1859. 

 Anoteroprocta, Baseoproeta(])iirs), Diesing, Syst. Helminth. 185 1 . 



Genus 1. Sipunctjlus. 



Sipunculus, Linoceus, Blainville, Lamarck, Cuvier, Grube, Diesing, 

 Quatrefages, Keferstein, &c. 



Syrinx, Bohadsch, Forbes (pars). 

 Lumbricus, sp., Pallas. 



1. SiPUNCULTJS NUDUS. 



Vermis microrhynchoteros, Rondeletius, Gesner DeVcrmib. Aquati- 

 libus, liber iv. p. 1226. fig. superior, 1558. 



Vermis macrorhynchoteros, Rond. Gesner I. c. fig. infer.* 



Syrinx, Bohadsch, De quibusd. Animalib. Marinis, pp. 93-95, t. /. 

 f. 6, 7, 1761. 



Sipunculus nudus, Linnaeus, Syst. Nat. 12th edit. p. 1078, 1766; 

 Pennant, British Zoology, vol. iv. p. 31, t. 20. f. 10 (bad), 1777 ; 

 Barbut, Genera Vermium, p. 16, t. 2. f. 3, 1783t; Gmelin, Linn. 

 Syst. Nat. vi. p. 3094 (synon. Martin exclud.), 1789; Lamarck, 

 Systeme des Anim. sans Verteb. p. 352, 1801, Hist. Nat. An. s. 

 Vertcb. 1st edit. iii. p. 78, 1816, 2nd edit. iii. p. 469, 1840 ; Tur- 

 ton, Brit. Fauna, p. 128, 1807; Schweigger, Handbuch der Naturg. 

 p. 553, 1820; Martens, Fauna Veneta, in Reise nach Venedig, Theil 

 ii. p. 523, 1824 ; Blainville, Diet, des Sc. Nat. art. Sipunculus, torn. 

 xlix. p. 309, and art. Vers, Ivii. p. 554, Atlas, t. 31. f. 1, la, 1827; 

 Leuckart, Brev. Animal, quorund. descriptiones, pp. 20, 21, 1. 1. f. 3, 

 1828; Fleming, British Animals, p. 491, 1828; Costa, Faun, del 



* The two worms figured by Gesner, in tbc work quoted above, appear to me, 

 without doubt, to represent the same species, only in different states of preserva- 

 tion in spirits. I have equally little doubt that they are identical with the 

 Syrinx figured by Bohadsch, and that the two species given by Linnieus in the 

 ' Systema Naturre,' S. nudus and 8. saccatus, ai-e only different states of the 

 same species, as has been pointed out by Cuvier and others. 



t The figure of S. nudus given by Barbut in the work quoted above is very 

 bad and does not well represent this species ; but the description appended to it 

 is very good. The figure given by him of the S. saccafus is copied from 

 Bohadsch, and refers to this species. 



