340 M. o. A. L. morch's review of the vermetid.e, [Nov. 12, 



" Verinetus irregularis, D'Orb., Cuba, p. 235, no. 146 (vL\ t. 17. 

 f. 16, 18) ; Ciit. Mus. Cat. p. 14. no. 146. 



"Hah. Cuba; Martinique, surles rochers, dans les plaques d'eau, 

 ou elle a et^ recueillee par M. Conde." — IfOrh, 



I am nearly sure that the group figured is a Spiroglyphus, per- 

 hajjs mixed with a Vermetiis. 



Forma 1. electrina. 



T. parva plerumque solitaria, lateraliter affixa, spiraliter irre- 

 gulariter torta, solida, subpellucida ; anfr. angusti graciles, 

 liris jiaucis validis nodidosis ; apertura soluta. 



Although this form has quite the appearance of a distinct species, 

 I find the transitions to the preceding so striking that I at present 

 do not dare to separate it. It is chiefly distinct by the amber-like 

 pellucidity of the substance, narrower whorls, and stronger lirse. I 

 have never seen more than three or four specimens together. It is 

 very likely analogous to Bivonia contorta, var. indetitata, Carp, 



Var. e. ELECTRINA (Vermetus). 



T. solitaria, repens, lateraliter affixa, spiraliter torta, aurantiaca ; 

 anfr. graciles plerximque contigui, liris validis 4-6 ; lircB incre- 

 menti eequidistantes in intersectioinbus nodiferis, intei-stitiis 

 foveatis ; apertura soluta, resvpinata, subcontracta ; intus la- 

 minis duabus brevibus remotis juxta columellam instructis, 

 liriila colu?nellari mediana distincta. 



Diam. ap. 1 m. 



Hub. lus. St. Thomas {A. H. Riise). 



I have only seen a few specimens with interior laminae, from Mr. 

 H. Krebs. 



Var. ^. electrina (Thylacodus). 



Hiffert a prcecedente anfr. reticulatis, liris obsolete nodosis, la- 

 minis iiiternis nullis. 



Sab. St. Thomas, on Lima scabra, and on Spondylus fimbri- 

 atus, var. aurantiaca, just corresponding in colour to the Vermetus 

 (Oersted). 



Var. ?j. BADiA (Vermetus). 



T. repens, laxe contorta, tenuiuscula ; anfr. prinii liMidi, liris 



parvis numerosioribus. 

 Hab. St. Thomas, several detached specimens ; an individual is 

 affixed between two of the former variety {A. H. Riise). 



Var. d. CANDiDissiMA (Vermetus). 



T. candidissima nodulosa ; anfr. primi isahellini ; intus lamina 



brevissima in anfr. medianis ; anfr. superne varicibus erectis 



3-4. 

 Hah. Ins. St. Thomas {H. Krebs; Riise). 



