88 DR. w. BAiRD ON THE gephyreA. [Feb. 13, 



Sipunculus verrucosus, Cuvier, Regu, An. 2nd ed. iii. p. 24.'?, 

 1830 ; Grube, Actiii. Echin. uiid Wiinn. Adriat. p. 44, 1840. 



Phascolosoma grunulatum, Leuckart, Brev. desc. An. quor. p. 22, 

 f. 5, 1838 ; Keferstciii, Uiiters. iib. iiicd. Seetli. p. 38, 18(32 ; Beitr. 

 in I. c. p. 200, 180"). 



Phascolosomum (/ranulatum, Diesing, Syst. Ilelin.ii. p. 63, 1851 ; 

 Eevis. der llhyiip;od. in I.e. p. 759, 18.VJ. 



Sijnoicnius (F/iymosomum) tnberculatus, Quatrefages, /. c. ii. 



p. G24, 18G5. 



Hab. Mediterranean, Adriatic (^/jVw/'/uvV/c-, LcfuViar/'), Sauta Cruz, 

 West Indies ((Ersted). 



2. Phascolosoma gravi, Baird. 



Siphunculus tuLercuIatus, Gvay, Spic. Zool. i. p. 8. no. 4, 1828 (not 

 Blainville, Diet. Sc. Nat. art. Si'poncle, 1827). 



Hab. ? B.M. 



The worm described by Blainville under the name of Sipunculus 

 tuberculatus difTcrs considerably from the species described by Dr. 

 Gray under the same name in his ' Spicilcgiu Zooiogica;' and a 

 comparison of Gray's type in tbe National Collection with De Blain- 

 ville's figure confirms this opinion. In the present species the caudal 

 extremity terminates in a ])rolonged acuminated point, studded all 

 over -with flattened tubercles like warts. The exsertile part of the 

 body is of considerable thickness, and is, like the opposite extre- 

 mity, also thickly covered with warts. In Ue Blainville's species 

 thecaudal extremity is rounded and blunt, and the anterior or pro- 

 boscidal extremitv is much more attenuated than the posterior. The 

 name verrucosus would have been ajjprojjriatc ; but Cuvier has pre- 

 occupied that name ; and more lately Hermann Meyer, in the 

 ' Zeitschrift fiir wissenschaft. Zcol.' i. p. 208, gives some anatomical 

 details of a species which he considers the Sipunculus verrucosus, 

 but which Diesing states to be the same as the S. tuberculatus of 

 Blainville. As the sjiecies described by Blainville takes precedence 

 by a year of Dr. Gray's, I have named it after this zoologist, who has 

 very well defined the s])ecies in his ' Spicileg. Zoolog.' 



3. Phascolosoma arcuatum. 



Sijninculus arcuutus, Gray, Spic. Zool. i. }i. S. no. ."), 1828. 

 JIab. huVi-d (General JIardwtc/.es Collection). B.M. 



4. Phascolosoma .lEri-RFAsii, sp. nov. 



Corpus altenvatum, fusl/ornie, macuUs ruhris in dorso natal urn, striis 

 circularibus transverse cinctmn, in medio sparse grunulatum, pos- 

 tice et anlicc dcme granulaliun, granulis brunneis; pars cxsertilis 

 sparse granulata ct in dorso rubra cincta ; ientaculis retractis. 



Long.corp. 14 lin.,proboscistertiam partem corpori a-quans; crass. 

 Corp. 11 lin., jiroboscidis h lin. 



llab. Spezzia (J. G. Jefi'regs, Escp). B.M. 



The body of this worm is narrow and cylindrically fusiform in 



