62 PROCEEDINGS OP THE ACADEMY OP 



visible in the epidermis. There may be three (so-called) species in the 

 group, viz. : lirulata, subelevata and conica. 



Margarita inflata. 



M. t. tumida, tenui, albida,, narceo pallide aureo ; anfr. vi. valde inflatis, 

 suturis ad angulum fere rectum impressis ; tota superficie tenuissime spira- 

 liter lirulata; lirulis acutis, haud elevatis ; in spira, circ. viii., minoribus sa?pe 

 intercalantibus ; interstitiis a lineis increinenti extantibus creberrimis tenu- 

 issime decussatis ; basi obtuse subangulata, striis creberrimis circ. xx. orna- 

 ta; apertura. subquadrata ; columella arcuata ; umbilico infundibuliformi, 

 laevi, angulato : operculo tenui, planato, suturis distinctis. Long. -44, long, 

 spir. -22, lat. -45, div. 85. 



Eab. Puget Sd., Kennerley. Vancouver, Lyall. Neeah Bay, Swan. 



Only two adult specimens of this remarkably elegant species have been 

 seen. It resembles the sbell from Greenland called M. striata, Brod. and Sby., 

 in the British Museum, but that under the same name from Behring Straits 

 appears distinct. In many respects it is like M. undulata, but differs in the 

 greater swelling of the whorls meeting at a nearly rectangular suture, in the 

 far more delicate sculpture without waves the keeling of the umbilicus and 

 the bend in the pillar which causes a slight spiral hollow inside the umbilical 

 rib. 



Mesalia lacteola, ? n. s. 



M. t. parva., tereti, tenui, albida ; epidermide tenui, flavidii, induta ; anfr. 

 x. rotuudatis, suturis valde impressis, lcevious ; costis circ. xii. radiantibus, 

 tumentibus, suturam versus evanidis, interstitiis parvis ; costis spiralibus ro- 

 tundatis, costas radiantes transeuntibus, supra spiram iii. validioribus, aliis 

 interdum intercalantibus ; costulis suturalibus parvis, antice ii. ; basi rotun- 

 data, vix striata ; columella recta, paullum effusa ; labro tenuissimo, parum 

 arcuato. Long. -33, long. spir. -24, lat. -14, div. 30. 



Eab. In sinu Pugetiano legit Kennerley. In insula Vancouver legit Forbes. 



Anne " M. lactelce" varietas insignis, sculpturae indole satis discrepans. 



Mesaua (? lacteola, var.) subplanata. 



M. t. " M. lacteolm" simili ; sed sculptura minus extante anfractibus 3ub- 

 planatis ; costis radiantibus pluribus minoribus, costulis spiralibus interdum 

 intercalantibus, aperturam versus saepe obsoletis. 



JJab. In sinu Pugetiano specimina viventia sed maxime erosa legit Ken- 

 nerley : juxta "Neeah Bay" legerunt Indianuli, Swannii discipuli. 



Rissoa compacta, n. s. 



R. t. parva, rufofusca, haud turrita, compacta, marginibus spirae excurva- 

 tis ; anfr. nucleosis iii. globosis, lsevibus, apice mamillato ; normalibus iii. 

 subplanatis, latis ; lirulis spiralibus obtusis circiter xv., quarum circ. vi. in 

 spira. monstrantur, interstitiis vix aequantibus ; lirulis radiantibus circ. xxx., 

 peripheriam tenus evanidis, anfractibus primis superantibus, anfractu ultimo 

 Bfepe obsoletis ; basi rotundata, haud (nisi testa juniore) umbilicata ; aper- 

 tura suborbiculari, peritremati continuo ; operculo tenui, paucispirali, rapid- 

 issime augente. Long. -06, long. spir. -04, lat. -045, div. 45. 



Eab. In sinu Pugetiano satis abundanter legit Kennerley ; prope Neeah 

 Bay, Swannii discipuli. 



Drillia incisa, n. s. 



D. t. u D. inermi" forma et indole simili; sed cinerea, rufofusco copiose 

 spiraliter lineata; anfr. nucleosis majoribus, subplanatis; anfr. normalibus 

 vii. subplanatis, epiraliter subobsoletc ccelatis ; sulcis in spira circiter viii., 

 quarum quarta radiatim sinuata ; canali quoad genus longiore, aperta ; co- 



[ April, 



