143 
2045 Ashmunella Thompsoniana Pecosensis 
Cockerell, Nautilus 16:105. Valle ranch, Pecos, N. M. (fossil). 
2046 Pyramidula strigosa concentrata 
Cockerell, Nautilus 16:106. Alpine, Chaffee Co., Colo. 
2047 Tritonia Palmeri Cooper 
Cockerell, Nautilus 16:117. Note. San Pedro, Cal. 
Type locality: San Diego, Cal. 
2048 Stearns, Robert E. C. 
Mollusks occurring in Southern California. Nautilus 16:133. 
2049 Elrod, Morton J. 
Montana shells—Pyramidula strigosa. Nautilus 17:1-6. 
Describes var. alpina as new, and other forms. 
2050 Cooper, James G. 
A list of the writings on conchology and palzontology of the 
author, compiled by W. J. Ramond, appears in the Nautilus 17: 
6-12. 
2051 Olivella (anazora Ducl. var.?) Porteri 
“Shell of about the form and size of the east American O: 
jaspidea, with very variable coloration; whorls about 7, spire 
acute with a very deep and narrow channeled suture not obscured 
by callus; surface of whorls brilliantly polished, smooth, except 
for microscopic spiral close striation which is present on all, but 
more uniform on particular individuals; color pale olive, yellow, 
or whitish, with sharp angular axial brown lines superposed hbe- 
tween the suture and the basal fasciole, sometimes forming a tent- 
like pattern and sometimes reduced to fine, close, more or less 
cloudy zigzags; a pale band in front of the suture, usually with 
vivid brown zigzag pointed forward, but sometimes plain, the 
brown lines when present broader and stronger than elsewhere; 
basal fasciole short, with a marginal and an adjacent narrow fold 
or plait anteriorly, lighter than the body, yellow or rich bluish 
purple; aperture narrow, simple, with a deep sutural sinus and a 
moderate parietal callus when mature. Height of shell 15, of 
aperture 9, max. diam. 6 mm.’’—Dall, Nautilus 23:133. 
San Diego, Cal., on sandbars near entrance to harbor (Miss J. 
M. Cooke). Scammon Lagoon, Lower California. Named in 
honor of Capt. George Porter, who collected largely in the Gulf of 
California, and is supposed to have lost his life at Tiburon Island. 
2052 Pomalax turbanicus Dall, Nautilus 23:134. 
Magdaiena bay, Lower Cal., in 36 fms. 
2053 Pachypoma magdalena 
Dall, 1. c. 135, same locality. 
2054 Pachypoma lithophorum 
Dall, 1. c. Cerros Island, Baja Cal., in 58 fms. 
2055 Leptogyra alaskana 
Bartsch, Nautilus 23:136, t 11 f 46. Port Graham, Alaska 
(Fred Baker). 
2056 Alvania Bakeri 
Bartch, l.c.137t11f8. Port Graham, Alaska (Fred Baker). 
2057 Onoba asser 
Bartsch, 1. c. 138, t11f9. Same locality and collector. 
2058 Odostomia (Evelea) Cookeana 
Bartsch, l. c. Ellamar, Alaska (Fred Baker). 
Named in honor of Miss J. M. Cooke, of San Diego, Cal. 
2059 Lymneza bulimoides techella Hald. 
