78 ZOOLOGY OF THE VOYAGE OF H.M.S. SAMABANG. 



6. Cabdium Bechei. PI. XXII. Fig. 12. Card, testa subcordato-ovata, medio et antice laevigata, 

 striis raimitis superficiariis radiantibus et concentricis sub lente decussata, epidermide tenui cornea nitente 

 in funicubs fibrisve concentricis creberrime disposita, area postica, epidermide nulla, radiatim costata, costis 

 tenuibus, confertis, quinque et viginti ad triginta, spinis brevibus compressis densissime seriatim ornatis ; 

 undique pulclierrime rosea, intus alba. 



Hab. Sooloo and Yellow Seas. 



We have much pleasure in dedicating this species, at the desire of Capt. Sir Edward 

 Belcher, to Sir Henry de la Beche, Director of the Ordnance Survey and President of the 

 Geological Society. It forms a most interesting addition to the genus Cardium, and is, without 

 exception, the most striking and distinct from any hitherto known that can well be imagined. 

 In colour it is of a fine rose-tint, with the following singular contrast of character. The 

 middle and anterior portion of the shell is smooth, presenting a peculiar soft velvety ap- 

 pearance, the effect of its being minutely decussated with concentric and radiating striae, 

 and covered with an exquisite thin shining horny epidermis, disposed in fine concentric cords, 

 abruptly terminating at the posterior area. The posterior portion, accordingly destitute of 

 epidermis, is very thickly rayed with ribs of short compressed spines, as if the delicately-clad 

 surface of the shell had been thus far ploughed up, as it were, into furrows. 



Only two odd valves of this pre-eminently beautiful shell were obtained, and, singularly, 

 in localities very remote from each other : one was dredged at the depth of forty fathoms in 

 the Sooloo Seas, between the islands of Borneo and Mindanao ; the other in the Yellow Sea, 

 thirty degrees north, at one of the islands of the Corean Archipelago. 



6. CONCHACEA. 



82. CYTHEREA, Lamarck. 



1. Cytherea virginea. PI. XXIV. Fig. 10. Cyth. testa oblongo-triangulari, sequivalvi, crassius- 

 cula, cinerascente-alba, nitente, radiatim obscure fasciata, latere postico linea impresso, area postica vio- 

 lasceilte. — 3u>-eJ.a- iLtzU&rt-u^rn. 'yncu^e-. Ct , 'Hcw-tzlnsi f >cx>cv; t>. isc/. r /fm, 



Hab. Eaotorn Seas . toAz^crm^a,. 



A very delicate and characteristic species, equivalve and of rather an oblong-trian- 



gular form. 



83. ARTEMIS, Poll. 



1. Artehis Dunkeri. PI. XXI. Fig. 17. Eeeve, Conch. Icon. Artem. pi. 6. f. 34. Cytherea 

 Dunkeri, Philippi, Abbild. uud Bescli. Conch. Cyth. p. 4. pi. 2. f. 5. 



Hab. Eastern Seas. 



We are anticipated in the publication of this fine species of Artemis by Dr. Philippi, 

 who had already named it after Dr. Dunker of Cassel. 



