271 DR. p. p. CARPENTER ON NEW SPECIES 



rounded ribs, which are evanescent near tlie umbo. Inside with a 

 very few strong teeth, developed in a curved hue. 



698. SCISSURELLA RIMULOIDES, H. Sp. 



S. t. rapiile aiigeiite, alTndu, tenvissima ; ajiice celnto ; anfr. 



iii., radiatim liratis, liris snidistnntibus, acntts, ohliquis; mn- 



bilico tiKifino; lubro ili'riiri, hand Jisso, seil (/pert urn jiosficii, 



tit til" \lunii\ii" /on/Kita, fnibquadidtd, e/o/ii/t/fa ; liris fruns- 



versis gradus testae increscentis dejudentihus , peritremate coii' 



tiniio, oiUqvo. 



Only one specimen was found of this beautiful little specie', the 



lirst known from America. It looks like a Felnfiita crossed by 



sharp ril)S in the direction of the slanting mouth. In the first whorl 



i»ie ril)s are very close. It then a-^sumes its normal sculpture, but 



there is nearly a whorl before there is any tnce of incision. This 



appears to have begun as a slit, which was afterwards <dosed uj). A 



b.uul, marked off by ten transverse riljs showirig stages of growth, 



eiuircles the shell as far as the hole, which is long i>.nd somewhat 



."Ctangnlar ; but there is no band between the hole and the outer 



iip. The shell furnishes a comj)lete transition to Riinula. It ii 



pieserved on tal>Iet 2.532. 



Long. •02;;, long. spir. -003, lat. "03; div. 140''. 



Hub. Mazatlan ; oW Spu/idi/lus cald/er ; Liverpool Collcctiou. 



fi!)!). VlTRINELLA ORNATA, U. Sp. 



V. f. siibdiscotdea, dinphnna, tenuissima ; anfr. iv., quormn iii. 

 prinii nucleosi, uiscidpti ; ultimo carina maxima circa periphe- 

 riam ; postice mbaiiyulata, rur/is radiantibus et striohs spi- 

 ralibus ormita; antiee carinata, carina nodosa; basi carina 

 altera et rvgis radiantibus ornuta ; umbilico anyulato, satis 

 mayno ; labro a carina indentuto. 



Long. Ol.'j, lat. •O.N--U3:» ; div. (circ.) 17.^°. 



Hub. Mazatlan ; one specimen off tipondylus, on tablet 2.)33; 

 Liverpool Collection. 



700. VlTRINELLA TENUISCULPTA, n. Sp. 



V. t. plana fa, diaphana, tenuissima ; anf. iii. et dimldio, quorum 



iii. nucleosi; striis elecatis, spiralibus, qiianim una magna, 



quasi carina prope suturam sculpta ; pcriphcria hiiud angv- 



luta ; basi bis angulata,interdum rvgis radiantibus distantibua 



ornatn ; umbilico s:'tis magno, carinata ; apertura undata, sub- 



quadrata. 



The sculpture is not uniform over the last whorl. The principal 



diagnostic features are the biangulated base, the infra^utural keel, 



Riid the roiuided periphery. 



Long, -ok;, long, spir." 0, lat. •02,3--03 ; div. 180°. 

 Hub. Mazatlan ; one specimen off" Upondylus, on tablet 2534 1 

 Liverpool Collection. 



258 



