80 M. O. A. L. MORCh's review of the VERMETIDJ3. [Feb- 11, 



Serpulo'ides inoperculata, Gray, Fig. iv. p. 83 ; Gray, Guide, 

 p. 127. 



Serpulorhis inoperculata, Adams, Genera, i. p. 359. 



Hab. In mari Rubro, socialiter vivens prope vicum Tor lapidibus 

 affixus, reperitur (Riqjpel). 



If this species can be generically distinguished, it would chiefly be 

 on account of the heart-shaped shield over the head, like that of 

 Siphonmm maximum, represented by Quoy and Gaimard. It wants 

 the pedal filaments, in common with Cladopoda and Limintina ; 

 from the former it is distinguished by the circular tip of the 

 metapodium, and from the latter by wanting the radiation of the 

 foot. 



Subg. Lemintina, Risso, 1826. 



Lementina, Risso, Hist. iv. p. 433; Gray, Proc. Zool. Soc. 1847, 

 p. 156, et Fig. iv. p. 83, 1850. 



Dr. Gray (Guide, p. 127) regards this genus as "probably only a 

 badly described and figured Serpuloides arenarius ; " but the shape 

 of the metapodium seems so remarkable to me that I cannot believe 

 that it is invented. The Vermetidoe have been so neglected that it 

 is not impossible that a similar form may exist. 



24. Thylacodes (Lemintina) cuvieri, Risso. 



T. cylindrica, subspiralis, unilocularis, ad extremitatem posterio- 

 rem clausa ; apertura rotunda, (Risso) . 



Animal limaciforme, postice vermiforme ; tenfaculis suhulatis ; 

 ocidi subsessiles, nigri ; branehice albce super capite locatce ; 

 pes cylindricus, truncatus, superficie Icevi rubra, Jlavescente 

 radiata, pallio fimbriato ruberrimo (Risso). 



Lemintina cuvieri, Risso, Hist. iv. p. 114, t. 2. f. 16-18 ; Gray, 

 Fig. t. 57. f. 3, p. 83. 



Hab. Sur les rochers peu profonds (Risso). 



The figure of the shell does not show any longitudinal strise ; the 

 description seems more natural than the figure, which is chiefly re- 

 markable from the radiated metapodium dentated at the edge. 



Subg. Cladopoda, Gray, 1850. 



Operculum none ; foot elongate, front end simple, hinder extre- 

 mity oblong, clavate or sub truncate (Gray). 



Cladopoda, Gray, Fig. 1850, p. 83 ; Guide, p. 127. 



This genus is chiefly founded on the elongated shape of the hinder 

 part of "the foot," which, in the 'Voyage de 1' Astrolabe,' is repre- 

 sented as fiddle-shaped (pes panduviformis), like the foot of Lacima ; 

 but, from analogy with the other Vermetidcs, it must be the tip of 

 the metapodium unusually enlarged. In specimens in spirits of T. 

 polyphragma the metapodium is sometimes of an expanded shape ; I 

 suppose therefore that this character is not of generic value. The 



