64 
MARINE SHELLS OF WEST COAST OF NORTH AMERICA 
the umbilicus, lip sharp, arcuated. Operculum paucispiral. (Tryon, Manual 
of Conchology.) 
Type. Lacuna puteola Turton. 
Distribution. Japan, Europe, west coast of North America, Medi¬ 
terranean, North Atlantic. Fossil, Eocene, .... 
Lacuna porrecta Carpenter, 1864 
See Part II, Plate 32, fig. 9 
Annals and Magazine of Natural History, series 3, 14:428. 
L. testa L. puteolo simili, sed multo majore, spira magis exserta; seu 
omnino fusca, seu zona pallidiore, seu pallida lineolis fuscescentibus tenuis- 
sime spiraliter ornata; epidermide tenuiter striata olivacea seu virides- 
cente induta; tenuiore, spiraliter tenuiter striata; anfr. v., vix planatis, 
rapide augentibus, suturis impressis, vertice mamillato; apertura tumente ; 
labio tenui, vix parietem attingente, intus subrecto; lacuna maxima, 
elongata, ad basin arcuata; peripheria expansa. Long., 52; long, spir., 2, 
lat., 4 poll. (Carpenter.) 
Larger than L. puteola, with more developed spire, body whorl slop- 
ingly expanded; effuse below, thinly spirally striate upon the thin oliva¬ 
ceous yellow or light-brown epidermis, sometimes with a pale band under 
the obtusely angulated periphery. (Tryon, Manual of Conchology.) 
Type in United States National Museum. Type locality, Vancouver 
Island. 
Range. Commander Islands, Bering Sea, to San Diego, California. 
Lacuna porrecta effusa Carpenter, 1864 
Supplementary Report, British Association for the Advancement of Science, 656. An - 
nals and Magazine of Natural History, ser. 3, 14:428. 
L. var. effusa: testa L. porrectae simili, sed multo majore; spira elevata, 
satis effusa; anfr. tumidioribus, suturis valde impressis; aperturam versus 
magis expansa. Long., 65; long, spir., 25; lat., 42 poll. (Carpenter.) 
Larger, more effuse, whorls more tumid, with well-impressed suture. 
(Tryon, Manual of Conchology.) 
Type in United States National Museum. Type locality, Neah Bay, 
Washington. 
Range. Straits of Juan de Fuca to San Francisco, California. 
[666 ] 
