18G8.] DR. W. BAIRD ON THE GEl'HYREA. 8? 



Turton, Brit. Faun. p. 74, 1807; Fleming, Brit. Animals, p. 491, 

 1825; Gray, Spic. Zool. p. 8, 1828. 



Sij}unculus (Cri/ptosomnm) s^roiwSz, Quatrefages, Hist. Nat. Ann. 

 ii. p. 628, 1805. ' 



Phascolosomum strombi, Diesing, Syst. Helminth, ii. p. G.5, 18.)1. 



Phascolosoma strombi, Keferstein, Beitr. z. Anat. Sipunc. /. c. 

 p. 202, 1865. 



Siphiuiculus dentalii, Gray, Spic. Zool. p. 8, 1828 ; Johnston, 

 Loudon's Mag. N. Hist. vi. p. 233, f. 25, 1833. 



Phascolosomum dentalii, Diesing, Syst. Helm. ii. p. 64, 1851. 

 "" Sijmncidus {Cryptosonwm) dentalii, Quatret'ages, Hist. Nat. 

 Annel. ii. p. 627, 1865. 



Sijmnculus bernhardus, Forbes, Brit. Starfish, p. 251, f., 1841; 

 Girarcl, Stimpson, Contrib. Smithson. 1853, p. 28. 



Phascolosoma bernhardus, Pourtales, Proc. Amer. Ass. Adv. Sc. 

 Meeting v. 1851, p. 41 ; Diesing, Eevis. d. Rhyngod. /. c. p. 759, 

 1859. 



Sipuiiculus (Phascolosoma) concharum, CErsted, De Regionib. 

 Marin, p. 80, 1844; Kroyer's Nat. Tidssk. 1844-45, p. 419; Sars, 

 Magaz. f. Naturvidensk. 1850, p. 77. 



Var. capitata. 



Sijmnculus capitatus, Rathke, Nov. Act. Nat. Cur. xx. part i. 

 pp. 143-147, t. 6. f. 20-23, 1843; O. Schmidt, Zeitscb. f. d. 

 gesammt. Naturw. 1854, pt. 3. p. 2, t. 1. f. 2. 



Phascolosomum capitatum, Diesing, Syst. Helm. ii. pp. 65 and 

 555, 185] . 



Phascolosomum bernhardus, var. capitata, Diesing, Revis. d. 

 Rhyngod. I. c. p. 760, 1859. 



ilab. Coasts of England, Scotland, &c,, inhabiting De«^a/iK;«- and 

 Stromb-shells, &c. 



a. P. dentalii, Cornwall (Laiighrin), Devonshire (/. Crunch) . 



B.M. 



b. P. strombus, Devonshire (Montaffu), Aberystwith (Henslow). 



B.M. 



c. P. dentalii, xar. capitata, Yorkshire (TV. Cliff, Esq.). B.M. 



2. Phascolosoma CiEJiENTARiuM. 



Sipunculus (Cryptosomum) cccmentarius, Quatrefages, Hist. Nat. 

 Annelcs, ii. p. 628, 1865. 



Ilab. North America, in Dentalium-i\\Q\\& (31. Richard lide 

 Quatrefages). 



% Species ivifh skin more or less densely covered luith xvarts or 



gramdes. 



(PHY3rosoMTT:\r, Quatrefages.) 



1. Phascolosoma TUBERCULATUM. 



■ Sipunculus tuberculatus, Blainville, Diet. Sc. Nat. art. Siponcle, 

 Atlas, pi. 33. f. 5, 1827. 



