70 M.0,A.L. MORCH’S REVIEW OF THE VERMETID&. [Feb.11, 
V. nove hollandia, Chenu, Ill. t. 1. f. 4, quoad staturam. 
Hab. Mexico (Dr. Mihlenpfordt) (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 
flavescente variegata, maculis adspersis paucis castaneis, liris 
longitudinalibus parvis obsoletissimis, superne liris tribus ex- 
pressis remotis inequalibus nodulis asperis parvis ; strie incre- 
menti obsolete ; anfr. ultimus varice brevi ; apertura reniformi- 
ovali, latere interno affixa. 
Diam. apert, 7-8 m. 
Hab. California, on Crucibulum? 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 Cardium echinatum. This 
species is the analogue to the preceding from the east coast. 
Var. a. LUMBRICELLA. 
T. repens, recta, primum laxe contorta, arenulis agglutinatis et- 
nereo et violaceo variegata, fasciis abruptis longitudinalibus vel 
strigis latis transversis castaneis ; lire longitudinales sat re- 
mote, sepe alternatim minores, interstitiis sepe scrobiculato- 
reticulatis ; liris medianis tribus interdum expressis vel crassis, 
granulis regularibus equidistantibus; ruge incrementi expresse, 
superne arcuate, lateraliter incrassate, valide, conferte,retuse. 
Diam. apert. circ. 63 m. 
Voy. de Venus, pl. 11. f. 2. fig. min. (Chenu, F. W. f. 2, copy) 
quoad staturam. 
Hab. California; 10-12 specimens crowded on a Margaritifera 
(Mus, Cuming). 
Var. 8. ERYTHOSCLERA, 
T. ut precedentis sed crassa, alba; linee incrementi ferruginee, 
conferte ; interstitus 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 NATALENSIsS, Morch. 
T. solitaria, crassa, irregulariter planorbiformis ; anfr. plerumque 
contigui, teretiusculi, complanati, latiuseuli, lateribus rotunda- 
tis, lapillis, presertim inferne, sparsis agglutinatis ; lire longi- 
tudinales subremote, interstitiis obsoletissime decussatis, ruge 
