18G2.] M. O, A. L. MORCIl's REVIEW OF THE VERMETID^. 69 



detached specimen shows a transitiou state. Fig. 5 of Chciui looks 

 entirely different, and more allied to V. annulatus, Rouss. 



5. Thylacodes turonius, Rouss. 



Vermetus tiiro7iius, Rouss., Chenu, 111. pi. 4. f. 44. 



Hab. ? 



According to the specific name, it would be from Touraine ; but, 

 from the colours in the aperture, it would seem to be a living shell. 



6. Thylacodes annultjs, Rouss. 



T. repens, laquearis, longitudinaliter siihtiliter striata; anfr. am,' 



pliati : postice carina brevi crenulata {ex icone). 

 VermetViS annuhis, Rouss., Chenu, 111. t. 1. f. 8. 



Hab. ? 



I do not know of any sliell like the figure ; but it seems to be a 

 good species. 



7. Thylacodes riisei, Morch. 



T. solitaria, repens, laqueafim toi'ta, femciuscnla, albescens, cameo 

 vel pallidissirne lilacino variegata; anfr. ampli, prcesertim apier- 

 turam versus, liris longitudinalibus parvis planis approximatis 

 alternatim minoribus, superne liris tribus remotis, tuberculis 

 compressiusculis elongatis, scepe acutis, inter dum tnuticis, con- 

 fluentibus, punctis ferrugineis interpositis ; strice incrementimi- 

 nutce in hitersectionibus lirarmn minutissime imbricatce ; latere 

 affixo irregidari, scepe fascia castanea lata longitudinali. 



Diam. aperturee circ. 15 m. 



Desh. Traite de Conch, t. 79. f. 16, nou absimilis. 



Hab. Ins. S. Thomse, Antillarum, Riise, Hornbeck (ilf?/s. reg, et 

 Univ.). 



Var. a. limacella. 



T. repens, solidula, Candida, hie illic pallide carnea ; anfr. sub- 

 cequales, lirulis longitudinalibus latiusculis planis confer tis, liris 

 latis 7-8 remotis undulatis vel obsoletissime nodulosis ; rugce 

 incrementi juxta margines validce, inde lateribus fluctuatis ; 

 strice incrementi obsoletissimce ; apertura subovalis, affixa. 



Diam. aperturse %\ lat,, 8 m. alt. 



Hab. Ins. An till., in Ostrea limacella. Lam., affisa (Mus. Cmning). 



This variety corresponds very well with the first whorls of the type. 

 It differs chiefly by greater solidity and more regular lirae, but other- 

 wise looks very different. 



Var. /3. MiJHLENPFORDTII. 



T, albescens, solidida, agglomerata, primiim repens vel irregulariter 

 sjnralis ; anfr. ultimus porrectus, teres, longus, leviter tortus, 

 IcEviuscidus, rugis et striis incrementi incequulibus ; lirce longi- 

 tudinales expresses, approximatcE ; superne seriebus tribus nodu- 

 lorum compressoi'um ; lircs incrementi undulatce, approximates ; 

 interstitiis lirarum irregidariter scrobiculatis. 



Diam. aperturse circ. 6 m. 



