OF NEW SOUTH WALES. 255 



(P. 254) — PSAMMOBIA FLORIDA. 



T. transversa oblonga, tenera, polita, purpurascens, postice albo 

 radiato, limbo epidermide flavo virescente induto, natibus postmedi- 

 anis, inconspicuis, latere antico semi-elliptico, apice submediano, 

 latere siphonali angustato, acute rotundato apice inframediano, 

 margine ventrali rectiusculo, interior incarnata, sinu siphonali 

 angusto prolong o ; cardine dentibus duobus minutis, divaricantibus 

 in utraque valva instructo. Long. \\, alt. T 7 o, poll. Hab. Ilia, 

 warra, N. S. Wales. 



A shell closely resembling in structure and exterior coloring 

 Machcera costata. It has the form of P. vesper Una, except that 

 the beaks are removed much further backwards. 



[A very distinct species, but rare in Port Jackson and on the 

 East Coast.— J. E. T. W.] 



(Loc. cit. p. 292.) — Cyclas egregia. 



T. ventricosa transversa oblonga, subcequilateralis, concentrice 

 tenue lirata, umbonibus parum elevatis, tumidis, epidermide viridi- 

 corneo, fusco zonato, plerumque G. cornea similis. Long. |-, alt -§-, 

 lat. i poll. Hab. N. S. Wales. 



It is larger, more rounded in outline, and more globose in 

 form than G. cornea. The epidermis is less glistening, of a 

 deeper green, and exhibits no traces of radiations. The ligament 

 is shorter and more prominent. The beaks hinge and furrowing, 

 and nearly the same in both. 



(Loc. cit. p. 293.) — Cyrena debilts. 



T. parva, tenuis, transverse ovata, postice ampliata et subtruncata, 

 subo3quilateralis, concentrice liris confertis subreflexis arata, 

 epidermide nitido superne olivaceo induta, umbonibus parum 

 elevatis, erosis, absque lunula, intus violaceo, albida ; dentibus 

 cardinalibus inconspicuis, dentibus lateralibus elongatis, striatis. 

 Long. t 6 q, alt. -£q, lat. i poll. Hab. "New Holland ? 



Most like G. pusilla, but has no areola in front of the beaks, 

 is less orbicular, and somewhat larger. In general, it resembles 

 a Oyclas. 



