4^ Zoological Society. 



'^o {. costata ; costis nonnullis dichotomis^ squamulis rotundatis, 

 )iih. arcuatisy confertis, ornatis ,-- latere postico oblique truncatOf 

 -ill.) antico rotundato. o 9/iHitfC '-> 



Hah, Bass's Straits, deep water. ' 



^ This species, found by the Hon. Captain Keppell, differs from the 

 type in the ribs radiating regularly from the apex and not being 

 nodosely wrinkled, but furnished with regular rounded arcuated 

 scaly tubercles. 



^>.3. Crassatella obesa, a. Adams. C testa cequivalvi^ incequi- 

 -H^ laterally crassa, gibbosa, epidermide rufo-fusca sericea obtecta, 

 -0^' transverse valde plicata, plicis prominentibus, ad marginem 

 ^t'h^ ventralem evanidis ; lunula impressa lanceolata ; latere postico 

 subproducto, angulatOy margine truncato; latere antico gibboso, 

 margine rotundato. 



Hab. New Zealand, deep water (Mr. Strange^. 



This species somewhat resembles C. lapidea. Reeve, but it is not 

 rayed, nor beaked so strongly posteriorly, and the valves are much 

 more gibbous and very strongly transversely plicate. 



t,s^4* Crassatella Cumingii, A. Adams. C. testa cequivalvi, 

 '^^\ incBquilaterali, subtrigonali, epidermide fusca radiatim striata 

 ~\^yiyObtectay transverse concentrice valde plicata, plicis crassis, ele- 

 Vs^fe vatis, ad marginem ventralem evanidis; latere antico rotundato, 

 postico subrostrato, margine oblique truncato. 

 Hab. Moreton Bay, East Australia, deep water {Mr. Strange). 

 ., rrThis large species is near C. pulchra. Reeve, but differs in being 

 more gibbose, less beaked posteriorly, in the plicae being stronger, 

 and in wanting the coloured rays. 



5. AsPERGiLLUM Strangei, A. Adams. A. testa cequivalvi, sub- 

 -V: cequilaterali, alba^ transversim sulcosa, umbonibus prominulis ; 

 r%V tubo inferne clauso, disco terminali basi adhcerente, ad latera 

 j/.?\ expansiusculoy margine tuhulis minimis ornato, postice subca- 

 -wv. rinatOy producto, tubulis curtis instructo ; superne elongato, 



tortuosoy carinis obtusis quatuor longitudinalibus, omato, mar- 

 gine simplice recto. 

 Hab. Seas of Australia {Mr. Strange). 



Two specimens of this curious form were collected, one attached to 

 a stone, and the other to the valve of a Mytilus. They were found 

 at Sydney, in shoal water. The fact of the tube being nothing more 

 than the valves greatly expanded and modified, is well shown in one 

 of the specimens. 



6. Trigonia Strangei, A. Adams. T. testa cequivalvi, ince- 

 quilaterali, subtrigona, fusca, longitudinaliter valde costata ; 

 costis antice confertis, postice magis distantibus, squamis nodi- 

 formibus, transversis, imbricatis, confertis, ornatis; interstitiis 



;U transverse crebre striatis ; latere antico rotundato, postico 

 j^QM. oblique subtruncato. „j-ji zui^ii- • r, 



^^JHab. Sydney, deep water {Mr. Strange). m '^no'^^H YJ:3via ? 

 ,ii;.This species is larger than T. margaritacea, and somewhat re- 



