﻿PTEROPODA.— Plate V, 



Species 33. (Fig. a, h, Mus. Brit.) 

 Cresei.s SPKIFEKA. Cve. tcstd donijatd, Iwvirjata, 



acuminata, dorso subspiraliler carinatd ; carina 



ad ajierturam in spinam desinenti; apice valde 



attenuato. 

 The spiNE-BEAEiSG Creseis. Shell elongated, smooth, 



acuminated, with a snbspiral keel at the back ; 



keel ending in a spine at the aperture : apex 



much attenuated. 

 Rang. Sowerbj^ Gener. of Shells. Pteropoda. f. 4. 

 Glcodora subula. Quoy. 



Hah. ? 



In this species and in Crcseif acirulafa the dorsal 

 keel crosses the tube diagonally, so as to indicate a 

 slight tendency to the spiral form. 



Genus SPIRIALIS. Souleyef. 



listrali 



Tfsfa Ityalina, fusiformis, vel helicifor 



Opercnlum ovatum pmucis'piralc. 

 Shell glassy, fusiform or heliciform, sinistral. Oper 



cnlum ovate, few-whorled. 

 Syn. (Pars.) HfiTEROFasus. Fleming. 



Species 34. (Jlns. Jeffreys.) 



Spikialis Flemingu. Spi. tcsld suhhclicifunni, all/'!, 

 ventricosd; spird conicd, anfractihns quints, uUimn 

 globoso; aperturd subpyrlformi, aniice produdd, 

 acuminatd, columdld rcciiusculd. 



Fleming's Spieialis. Shell subheliciform, white, 

 ventricose ; spire conical, whorls five, last globose, 

 aperture somewhatpyriform, anteriorly produced, 

 acuminated ; columella rather straight. 



Forbes. Forbes and Hanley, British Mollusca. 



Hah. North British seas. 



Species 35. (Mus. Jeffreys.) 

 Spieialis Macandbei. Spi. kstd fusifunai, albd, 

 Icevigatd; spird ptyramidatd, elevatd ; anfractibus 

 septenis, convexixiscidis ; aperlurd pyriformi, n«.- 



fice acuminatd; columella elongatd; leviter fnr- 

 tuosd. 



Macandeew's Spieialis. Shell fusiform, white, smooth, 

 spii-e pyramidal, raised; whorls seven, rather 

 convex; aperture pyriform, acuminated ante- 

 riorly; columella elongated, slightly tortuous. 



Forbes and Hanley. British Mollusca. 



Ilab. Ireland. 



Species 3G. (Mus. ?) 



Spieialis rotunda. Spi. testd subdepressd, heliciformi, 

 spird brevi ; anfractibus trinis, ultimo ventrieoso, 

 magno, late umbiUcato ; aperturd oblique ovatd. 



The rounded Spieialis. Shell subdepressed, helici- 

 form, spire short, whorls three; last ventricose, 

 large, broadly umbilicated ; aperture obliquely 

 oval. 



D'Opjuony. Voy. Amer. Merid. Moll., PI. XIII. f. 16. 



Hah. Atlantic Ocean. 



Species 37. (Mus. ?) 



Spikialis Jeekreysii. Spi. testd dfpressd, discoided, 

 .■'pirn brt'vissimd, uttiiuo lata, rotunda, late umbi- 

 i:,;i1o. 



Jefi'i;ey's Spirialis. Shell depressed, discoidal; spire 

 very short, last broad, rounded, broadly umbili- 

 cated. 



Forbes and Hanley. Brit. Moll. 



Hah. British Channel. 



Species 38. (Mus. ■ ?) 



Spikialis tenteicosa. Spi. testd globosd, albd, an- 

 fractibus quaternis, idtiino maximo, haud umbili- 

 cato; ajit'rturd breviter subpyriformi, antici angn- 

 latd ; columella teiiuissinia. 



Thk ventricose Spieulis. Shell globose, white; whorls 

 four, last very large, not umbilicated ; aperture 

 shortly rather pyriform ; anteriorly angular ; 

 columella very thin. 



SouLETET. Voy. de la Bonite. AIoll. PI. XIII. f. lb. 



Hab. Atlantic Ocean. 



