1865.] MR. G. F. ANGAS ON NEW AUSTRALIAN SHELLS. 57 
radiantibus circ. 14, validis, rotundatis, aliis interdum inter- 
calantibus ; interstitiis duplo vel triplo majoribus, concavis ; pagina 
interna nitente, alba, plus minusve fusco pallide tincta; margine 
elegantissime pectinato, fusco undato ; spathula rubro-fusca, exacte 
definita. 
Long. 1°45, lat. 1°2, alt. +45 poll. 
Hab. Port Lincoln, South Australia (Coll. Angas). 
Easily recognized by the distant, rounded ribs. 
8. PATELLA GEALEI, nob. (2 4 
P. ¢. “ P. jacksonensi” simili; sed pagina interna metallice splen- 
dente, aureo parum tincta, margine minimo; spathula lurida, 
plumbeo et fusco nebulosa. 
Long. *1,/lat. 86, alt. -4 poll. 
Hab. South Australia (Coll. Angas). 
I have named this species after Mr. Geo. Geale, Mr. Cuming’s 
worthy and intelligent assistant. 
9. CrePIDULA IMmersa, nob. (PI. II. fig. 12.) 
C. t. “C. hepatice’” simillima ; tenui, hepatica, recta, ovali, epi- 
dermide tenuissima tenace induta; vertice nucleoso mediano, 
mijore, viv sinistrorsum torta, apici immerso ; margine normaliter 
acutissimo, interdum laminato ; septo tenui, curtiore, profundiore, 
subdiaphano, margine recto. 
Long. 1°06, lat. 73, alt. +2 poll. 
Haé. Port Lincoln, South Australia, on dead Pinne (Coll. Angas). 
The species is named from the sunken apex of the nuclear portion. 
The shell is curiously like fine young specimens of C. rugosa, Nutt. ; 
but in that species the nucleus is much smaller, and the apex visible. 
10. Myopora convexa, nob. (Pl. II. figs. 13 & 14.) 
M. t. parva, compacta, solidiore, vir inequilaterali, valde inequi- 
valva; v. dextra valde convera, altera planata; margine dor- 
sali subrecto, postico satis incurvato, ventrali valde excurvato ; 
tota superficie ( preter lunulam posticam elongatam, parum exca- 
vatam, a carinis obtusis definitam, levem) liris concentricis 
crebris obtusis ornata, interstitiis parvis ; parte postica ab angulis 
obtusis definita; intus vivide nacrea, fossa cartiliginea parva, 
altissima, ossiculo?..; valva convexa dentibus lateralibus validis, 
marginibus valve planate extantibus convenientibus ; cicatr. 
adductoris post. subtriangulari, ant. pyriformi; linea pallit sim- 
plici ; sinu parvo, semilunato. 
Long. °39, lat. 35, alt. +16 poll. 
Hab. New Caledonia (Coll. Angas). 
The convex valve entirely embraces the other, as in Corbula, 
receiving its margin within the lateral teeth, and leaving a projecting 
ventral edge. The ossicle had perished. 
I have included, in the plate which illustrates this paper, figures of 
two new forms of Chitonide, which were described by Mr. Henry 
