DOLABRIFERA 



(leuus DOLABRIFERA, Gn,,i. 

 .iiiiiiiiil iiir/rinimi, tnichdipoihdii. 



Ti-sin payca, sub (effi/iiiie lunmri/h Crflata, cii/carca, ■'jiider- 

 hiiile temd indida, dolubrlformh, niick-o hum! spirali. 

 Aniiual marine, trachelipodous. 



Shell small, hidden mider the skin of the animal, calcare- 

 ous, covered with a thin epidermis, hatchct-sliaped, 

 nucleus not spiral. 

 The non-spiral nucleus and the squareness and straight- 

 uess of general form distinguish this genus from Dola- 

 bella. The animals of Z)o/ffie/^ff, i)ofaA/-//fra, and Aphj- 

 siii are generically the same. 



Few species, and those rarely, are to be seen in collec- 

 tions. The West India Islands and several of the I'aci- 

 fic groups produce them sparingly. 



Species 1. (Fig. a, h, Mus. Brit.) 

 DoLABRIFERA VITR.EA. Bol. testd parvd, teiiiii, r/ilrced, 

 jidlucicld, amjuHta ; rostro brevi, latlmcnlo, apice iii- 

 curvo, crasso ; maryiiii; hamll siibarciinto, iitarijhii: e.r- 

 ienio suhrotnndo. 

 Shell small, thin, glassy, pellucid, narrow; rostriiin rliort, 

 rather wide, apex incurved, thick ; ba~al margin 

 slightly archeil, outer margin a little rounded. 



SOWERBY. 



Hub. ''Xarai," Fiji Islands. 



The smallest of the known species ; it is thin and 



Species 2. (Fig. a, b, Mus. Brit.) 



DoLABRIFERA SoWERBYI. Bol. lestd tortiid, siibfrigoiid : 

 roslro lorliio, retrorso, prodiicto, apice pano .- imo-- 

 yiiia basali rectiuscido, mttrr/ine snperion coiicaoo, 

 margine externa infra medinm ainnuto, terniino rotiiii- 

 daiim acuminaio ; disco ad domtiii medio depreuo. 



Sowerby's Polabrifeua. SheU tortuous, subtrigonal, 

 Ijeak tortuous, thrown backwards, produced, apex 

 .small; basal margin rather straight, upper margin 

 concave, external ni;u-;:iu -inuated l]elou the middle. 

 roundly acuminated at thi' end: (li>k centrally de- 

 pressed at the back. 



GuiLDiNG, Zool. .lourn. 



Nab. St. Vincent's, W. I. 



The tortuous depre-ion in the dor-^al di-k. and the 





lation of the outer mara-i: 



Species 3. (.Mus. Brit.) 

 DulaBKIKERa I'ACIFICA. iJol . /es/d leiii 



lonijii : raxlro hilu, apice iuciirvo. leriler incnissnla ; 

 ii/ari/i/ie btmali eloiigato, rectiii.sciilo ; Mari/itie teniii- 

 nali rotuiidiitim aiicjulalu ; mar/jiiie e.rter)io medio mib- 

 sintiato. 

 The Pacific Dolabkifera. Shell thin, straight, ob- 

 long ; beak wide, apex incurved, slightly thickened ; 

 basal margin elongated, rather straight ; terminal 

 )uiidly angular ; outer margin subsinuous 

 Idle. " 



I'EA^ 



Islands in the Pacific. 



Species 4. (Fig. a, b, Mus. ? copied.) 



DOLABRIFERA CuviEltr. Dol. tesid solidd, .fidiipiadratd, 

 raiialib/is indistinctis radiantibm duobns mediaius im- 

 pressd ; rostro prodiicto, trigono, apice crns-m, retror-w, 

 qiiadruto ; mai'ffiiiibiix e.rterno et teriaiitali si/nialis, 

 termino rotitiidatim uriiiiiinato ; occnrrit rariefa-s 

 testa elongatd, attennatd. 

 Cuvier's Dolabrifera. Shell solid, S(|uarish, im- 

 pressed with two medial, indistinct, radiating canals; 

 beak produced, trigonal, with thick, back-turned, 



s.pi 



X ; external and terminal margins sinu- 

 ated, end rouiuUy acuminated ; a variety occurs with 

 shell elongated, attenuated. 

 II. AND A. Ada.ms, Genera of Shells. 



Aplgsia dolabrifera, Cuvier. 

 Ilab. Island of BourliDU. 



Our figure of the noruuil form {n) i* taken from Mr. 

 Adams's work, that of the attenuated shell from Hang's 

 work on ' Aplysiic,' where also a much-distorted shell, 

 still preserving the rather straight, stjuare character of the 



species 



red. 



Species .5. (Fig. a, b, Mus. Brit.) 

 DOLABRIFBRA MARMOREA. Dol. test dhreri , sidiipiadratd. 



apice 



ertd : rostro tirevimsrulo. Into. 



October, ISOS. 



