162 M. o. A. L. morch's review of the VERMETiDiE. [April 9, 



17. SiPHONiuM NEBULOSUM, Dillwyii, 1817. 



Tuyaux de mer, Davila, Cat, 1767, i. p. 100. t. 4. f. H (typus) ; 

 FavanDe, i. p. 652. t. 6. f. 3 (copy). 



Serpula nebulosa, Dillw. ii. p. 1076. no. 19 ; Wood, Index, Serpula, 

 fig. 18 (copy). 



T. juvenilis planorbiformis, corrodens, castanea, aurantiaea vel 



alba, leviter spiraliter lirulata, 

 T. atate media affixa, spiraliter varie contorta, alba jiallide au- 

 rantiaea variegata, longitudinaliter lirata, superne carinis 

 tribus squamiferis ; strice et ruga incrementi sigmoidece, in- 

 cequales ; apertura circularis, libera, interne fascia basali in- 

 trante tosta vel anthracina, ferrugineo terminata. 

 T. grandceva libera, tubulata, leviter torta, teres, cequalis, anti- 

 quata, liris longitudinalibus obsoletis et siibobliquis, annulatim 

 rugosa et sulcata, inferne septo convexo obliquo terminata . Color 

 candidus, intus juxta aperturam macula interrupta castanea. 

 Long. 80 m., diam. 10 m., diam. apert. 9 m. 

 Opercidum pellucidum, fiavescens, superne concavum, laminis ap- 

 pj-oximatis concentricis, inferne convexum ; impressio muscularis 

 magna, rufa, concentrice rugidoso-striafa, linea coccinea peri- 

 pherica terminata, vertice obtuso lata prominulo ; linibus ele- 

 vatus, nitidus. 

 Diam. 7 m. 



The concentric lamince seem to form a distinct upper layer, which 

 can be separated with a knife. The spiniferous bodies are clavate, 

 and of the same kind as shown in fig. 16, but more elongate, and 

 dilated at the base. The surface is sometimes entirely occupied by 

 a young specimen or a Serpula. 



Var. a. serrata. 



T. liris destituta, carina laferali squamis 6-7 subremotis, com- 

 pressis, acutis, incequilaterali-triangularibus ; latere externa 

 piano ; fascia interna nigra ferrugineo terminata. 



Diam. 6-7 m, 



Hab. Honduras ; on a branch of dead coral (coll. Cuming.). 



Var. /3. ACXJLEATA. 



T. carina submediana, squamis 7-8 compressis, angustis, longis, 

 liris duabus aculeato-squamosis in regione umbilicali, unde aper- 

 tura superne trispinosa, latere externo liris obsoletis nodulosis, 

 inferne transversim rugosa, latere affixo glauco et castaneo va- 

 riegato ; intus fascia nigra tosta. 



Diam. ap. 5 m. 



Hab. Honduras (coll. Cuming.). 



Var. y. turboides. 

 T. liris 6 subcequalibus, leviter nodulosis. 



Serpula bicarinata. Sow. Man. f. 4 ; Humphrey, Conchology, pi. 

 10. f. 9 & 10. 



