CIRCE. 



Plate VII. 



Species 3G. (ilus. Taylor.) 



ClKCE INTEKMEDIA. Ctrc. tedd suhobliqiic globosn, crassd, 

 ad umhones compressd, fidvescente-albd, rufo-caalaneo 

 triijOUO-reticulaLd, maciilis versus lunnlairi et aream li- 

 gmneuii in strigis couspiciiis decurrentibns, concentrice 

 subrugose pUcato-striatd, ad umhones siibobsolete diva- 

 ricatiiii plicatd. 



The intekmediate Cikce. Shell rather obliquely glo- 

 bose, thick, compressed at the uniboes, fulvous white, 

 triangularly reticulated with reddish-chestnut, the 

 spots running towards the lunule and ligamentary 

 area into conspicuous streaks, concentrically some- 

 what roughly plicately striated, at the umboes rather 

 obsoletely divaricately plicated. 



This appears to me to be a new species, and one 

 of importance in the genus, as being intermediate be- 

 tween the types of the two groups in this and the preceding 

 Plates. My attention was first called to the shell by Mr. 

 Sowerby, who was preparing to send it to Mr. Taylor. 

 On receipt of it, Mr. Taylor found in his collection another 

 undoubted specimen in an earlier stage of growth. It 

 helps to conHrm in a singular niamier the propriety of 

 removing to this genus the Laniarekian Ogtherea castreusis 

 and its allies. Along with the reticidated camp-like paint- 

 ing of C. castrensis, it possesses the divaricate umbonal 

 wrinkles of C. divaricata and its numerous allies, to say 

 nothing of the absence of any angular production of the 

 pallial impression in the interior. 



Species 27. (Fig. a, h, c, Mus. Cuming.) 



ClucE OUNATA. Circ. testa suhtrigono-rotiikdatd, gi.bbvsd, 

 subcordatd, cbiered, versus nmbones albidd, liiieis tiigris 

 ant rnfis acute undatis mtdique profuse radiatd, con- 

 centrice irregulariter striata, striis ad latera fortio- 

 ribns. 



The ADORNED Circe. Shell somewhat triangularly 

 rounded, gibbons, somewhat heart-shaped, ash-co- 



loured, ^vhitish towards the luuboes, profusely rayed 

 throughout with black or red zigzag lines, concentri- 

 cally irregularly striated, stria3 stronger at the sides. 



CgtJierea oniata, Lamarck, Anim. sans vert. vol. yi. p. 309. 

 Circe castrensis var., Deshayes. 

 Lioconcha ornata, Morch. 



Hab. Indian Ocean. 



J\I. Deshayes is probably correct in recording the La- 

 niarekian C ornata as a variety of C. castrensis, but it is 

 a very characteristic variety and it is of a less solid porce- 

 lain-like substance. 



Species 38. (Fig. a. b, c, Mus. Cuming.) 



Circe castrensis. Circ. testa snbtrigono-globosd, vet 

 cordatu, alba, nitente, iiiterdum cinereo vel croceo 

 tinctd, lineis vel macnlis castaneis ant nigris acute 

 anr/nlatis plus minus snffusis picld, concentrice irregu- 

 lariter striata, inlerdmn IcEviusculd, striis ad latera 

 forlioribns. 

 The camp Circe. Shell somewhat triangularly glo- 

 bose or heart-shaped, white, shining, sometimes ash- 

 or satl'ron-tinged, painted with more or less suffused 

 chestnut or black sharply angled lines or spots, 

 concentrically irregularly striated, sometimes almost 

 smooth, striae stronger at the sides. 

 Venus castrensis, Linnaeus, Syst. jSTat., p. 1133. 

 Venus anstralis, Chemnitz. 

 Venns Lorenziaiia, Chenniitz. 

 Cytlierea castrensis, Lamarck. 

 Circe castrensis. Gray. 

 Lioconclia castrensis, !Morch. 

 Ilab. Indian Ocean. 



Among the varieties of this beautif\d species, the shell 

 represented at Fig. 28 i is that which passes into C. ornata. 

 It is broader from the umboes to the ventral margin, and 

 has less of the smooth porcelain surface which is so cha- 

 racteristic a feature of the other varieties. 



October, 1863. 



