70 M, o, A. L. morch's review of the vermetid^. [Feb. 11, 



V. nova hoUandice, Chenu, 111. t. 1 . f, 4, quoad staturam. 



Hah. Mexico {Dr. Miihlenpfordt) {Coll. Dunkeri). 



Described from a dead group composed of about six or seven spe- 

 cimens. The first whorls are so like those of the former variety, 

 that I do not think it can be specifically different. In shape it looks 

 not unlike Bivonia semisurrecta. In Mr. Cuming's collection is a 

 specimen labelled " Philippines," which does not seem to differ from 

 it materially. 



8. Thylacodes eruciformis, Morch. 



T. tenuiuscula, repens, laqueatim contorta, pallide violacea, albo et 

 Jlavescente variegata, maculis adspersis paucis castanets, liris 

 longitudinalibus parvis obsoletissimis, superne liris tribus ex- 

 pressis remotis incsqualibus nodulis asperis parvis ; strict incre- 

 menti obsoletce ; anfr. ultimus varice hrevi ; apertura reniformi- 

 ovali, latere interna affixa. 

 Diam. apert. 7-8 m. 



Hab. California, on Crucibulumi umbrella, Desh., var. (Mus. 

 Cuming^. 



The small sharp nodules of the three dorsal rows are strongest in 

 the exterior row, reminding one of those of Cardiutn echinatum. This 

 species is the analogue to the preceding from the east coast. 



Var. a. LUMBRICELLA. 



T. repens, recta, primum laxe contorta, arenulis agglutinatis ci- 

 nereo et violaceo variegata, fasciis abruptis longitudinalibus vel 

 strigis latis transversis castaneis ; lirce longitudinales sat re- 

 motes, scepe alternatim minores, interstitiis scepe scrobiculato- 

 reticulatis ; liris mediants tribus interdum expressis vel crassis, 

 granulis regularibus cequidistantibus ; rugae incrementi expressce, 

 superne arcuatce, later aliter incrassat(e,validce, confertce, retusce. 



Diam. apert. circ. 6^m. 



Voy. de Venus, pi. 11. f. 2. fig. min. (Chenu, F. W. f. 2, copy) 

 quoad staturam. 



Hab. California; 10-12 specimens crowded on a, Margariti/era 

 {Mus. Cuming). 



Var. /3. ERYTHOSCLERA. 



T. ut prcBcedentis sed crassa, alba; linece incrementi ferruginece, 

 confertce; interstitiis fenestratis. 



Hab. California ; on a young Margaritifera {Mus. Cuming). 



This shell is very like to Bivonia quoyi, var. variegata, in respect 

 of colour and the agglutinated sand ; all the specimens are creeping, 

 with affixed apertures. 



9. Thylacodes natalensis, Morch. 



T, solitaria, crassa, irregulariter planorbiformis ; anfr. plerumque 

 contigui, teretiusculi, complanati, latiusculi, lateribus rotunda- 

 tis, lapillis, prcesertim inferne, sparsis agglutinatis ; lirce longi- 

 tudinales subremotce, interstitiis obsoletissime decussatis, rugce 



