6 Dr. 1'. P. Carpenter on new Forms uf Mullvsca 



niellar thread for two whirls only. Operculum norma 

 thin edge, dark red. 



32. Lacuna porrecta. 



L. testtL L. pufeolo simili, sed iimlto majore, spira ma2;is exserta ; 

 seu oniiiiiio fiisea, seu zona palfuJiore, sen pallida liiieolis fiisres- 

 centibus teiniissime spiraliter oinata ; cpidermide teiiuitcr striata 

 olivacea seu viridesceiite induta; tenuiore, spiraliter tenuiter striata ; 

 anfr. v., vix plauati;*, rapide aufjrntibns, snturis impres!>is, vertiee 

 mamillato ; apertura tuinente ; labio tenui, vix parietem attiugente, 

 iutus sul)recto ; lacuna maxima, elonsrata, ad basin areuata ; peri- 

 pheria expansa. Lonp. 'o^, lona;. spir. 2. lat. -4, div. M0°. 



?Var. effu.^a : testa L.pnrrectce sinuli, sed inulto miijore ; spira elevata, 

 satis eft'usa ; anfr. tninidioribus, sutnris valde impressis ; aperturam 

 \ersus magis expansa. Long. •6f), long. spit. '2h, lat. *.'), div. 60°. 



?Var. exeequata : testa L. effusce simili, sed anfr. planatis, snturis 

 parum mipressis. Long, -a, long. spir. '2, lat. 'A'l, div. yO". 



Huh. Neeah Bay {^wan). 



The form L. exeequata is intermediate between the very dif- 

 ferent L. porrecta and L. effusa. Tiie Lacuna vary so much 

 {vide Forbes & llanley in loco) tliat, even with a large multitude 

 of specimens, it is not easy to state what constitutes a species. 



33. Lacuna (? soHdula, var.) compacta. 



L. testa X. solidulfP, var., simili ; parva, solida, compacta, angnsta, 

 subturrita, marginibus spirae excurvatis : aurantiaca, interdum pal- 

 lidiore znnata ; anfr. snbplanati.*, sutnris distinctis ; tota supertiiie 

 confertissime spiraliter striolata ; basi valde angulata, subplanata ; 

 apertura subqnadrata ; coli-.mella vix lacunatu. Long. •2.'^, long, 

 spir. '1, lat. -17, div. (Jl)°. 



Variat testa elongata : variat quoque columella normaliter lacunata. 



Hab. Necah Bay [Swan). 



Possibly an extreme form of the very variable L. solidula, Lov. 

 {= L. carinata, Gld., non A. Ad., = Modelia striata, (Jabb), yet 

 distinct in all ages. The young shells resemble small LitorituB, 



34. Lacuna variegata. 



L. testa tenui, plus minusve elevata, soluta, irregnlari ; adolescente 

 fusco-purpnreo ; adulta iivida, radiatim seu diagonaliter varie ir- 

 regulariter strigata, strigis fuseo-aurantiacis, saepe ziczaeformiljus ; 

 anfr. vi., quorum prinii compacti, apice subinainillato ; deio soliitis, 

 postice planatis, antiee ex[)ansis ; basi rottuulata seu angulata ; 

 apertura subovata ; labro postice porrecto ; labio srcpe parietem vix 

 attingente; columella intus recta, extus valde lacunata. Long. 'J, 

 long. spir. 'IG, lat. "l", div. 50°. 

 Hub. Neeah Bay {Swnti). 



Painted like L. decorata, A. Ad., which differs in having a 

 normal growth, with very slight chink. 



240 



