602 STUDIES ON AUSTRALIAN MOLLUSCA, 



comprehend that two species and genera were involved in his 

 synonomy, remarked that the apices of the two species turn in 

 opposite directions,* an observation which I have verified. Dall 

 remarks "that Hipponyx danieli,Qvo^%e, is ahnost certainly Pa^e/^a 

 calyptra of Martyn, described in the last century. A magnificent 

 specimen from the Fiji Islands is in the National Museum. It is 

 a Capulus and not a Hipponyx.^' j 



Serpulus sipho, Lamarck. 



This common and widely distributed Australian shell was 

 figured from King George's Sound, W.A., by Quoy &l Gaimard 

 in the ' Voyage of the Astrolabe,' under the name of Vermetus 

 arenarius, Lamarck. Tracing back the citation to Lamarck we 

 find that he in turn based his account on a species described by 

 Linne in the Systema ISTatura (xii., 1758, p. 1266). According to 

 Hanleyi the original specimen used by Linne, still preserved in 

 the Museum of the Linnean Society of London, is the Mediter- 

 ranean species otherwise called Vermetus gigas, Bivona.§ 



Consequently the name which Quoy & Gaimard attach to their 

 drawing must be rejected. Tate ct May, to cite the latest state- 

 ment, replace it by " Thylacodes sulcatus, Lamk." 



But Vaillant,|| after examining the types of Lamarck andi 

 of Quo}^ & Gaimard in the Paris Museum, remarks that the namej 

 of Serpula sulcata, Lamk., covered tw^o species; the first a fossil 

 from Touraine, the second a recent Australian shell. He restricts i 

 the name S. sulcata to the former, and unites the latter with' 

 Vermetus arenarius, Q. & G. (not Lamk.), and V. dentiferus^\ 

 Q. & G. (not Lamk.), to Serpula sipho, Lamk. (Anim. s. Vert. 

 1818, p. 626), under the name of Serpulorhis sipho. The genusl 



* WatsoH, Chall. Exped. Zool. xv., p. 457- 



t Dall, Bull. Mus. Comp. Zool. Harv. Coll. xviii., 18S9, p. 287. 



X Hanley, Ips. Linn. Conch. 1855, p. 447. 



§ Therefore the shell discussed in these Proceedings, (2 , Vol. ix., p. 465, agj 



Ktiphus arenarius should take the name of Kuplins polythalamins, Linn. 



II Vaillant, Nouv. Archiv. Mus. vii., 1871, pp. 193, 197. 



