ee PROCEEDINGS OF THE NATIONAL MUSEUM. 215 
times larger than in the figured type. Among the shells collected by 
Mr. Arnold is a very young specimen of Avicula, which goes to confirm 
the nativity of the questionable specimen of A. peruwviana before enu- 
merated. A remarkable find of several hundred Nassa fossata, and an- 
other of especially fine Cardium substriatum, both at San Pedro, are 
among the interesting data of our later conchological notes. 
Los Angeles, May, 1892. 
EXPLANATION OF PLATES. 
Notr.—The figures being enlarged or reduced from the actual size of the speci- 
mens, the actual largest diameter of the specimen, as seer in the figure, is mentioned 
in millimeters, of which 1 is equal to 3'; of aninch. The Museum registration num- 
ber of the specimen is also added. 
RATHI NaleNG 
Page 
Fig. 1. Mitromorpha filosa Cpr., 46418, 8 millimeters..--..-..-.--..----------- 208 
2. Halistylus pupoideus Cpr., 14824, 6 millimeters ...........-...--.------ 202 
3. Mitromorpha aspera Cpr., 46416, 5 millimeters. ...-..-.---..----------- 208 
4. Opereulum of Pachypoma inequale Martyn (=P. gibberosum Cpr.), 
OULSIde) Views: 25.0) MIUMMeters). 5. accesses lo icila alan ae aaa 199 
Penne Same MNSIGOCVIeW, 20:0 INT IMCtERS aes ae oe ecles ses ssc emesis 2 ee ae 199 
6. Marginella Jewetiii Cpr., 56224, 5.6 millimeters...........-..--..------ 212 
GaeOnvetla bacica Cpr; 47198; 1simillameters! sos. 2S c<c <2 2 = chee cine 212 
8. Calliostoma tricolor Gabb, 59800, basal diameter 15 millimeters ......-- 201 
9. Olivella intorta Cpr., 47202, 15 millimeters. In this figure, as well as 
MH oUTe the Colo pAbiennels TaMOLe den. = ecclt s.s saefe ons oelalaeee 212 
PLATE XX. 
Fig. 1. Fusus luteopictus Dall, 32350, 17.5 millimeters; the color pattern is ig- 
VOLE Ce ee ee ase ae ioe ava pare alata ta/ aie, Simone (alate aha ayia aie] oie = eleenine tar aee oars 217 
2. Ocinebra circumtexta Stearns, short variety, 46694, 22 millimeters... --- 215 
3. Ocinebra lurida Midd. var. munda Cpr., 46708, 16 millimeters ......---- 215 
4. Amphissa bicolor Dall, 106877, 14 millimeters ...........----.--..------ 213 
5. Marginella (Volutella) pyriformis Cpr., type specimen; 14950, 2.3 milli- 
MTCHEUS sees ca es ome eesca ses eee oS a et eee eae pee ge ora abereae 212 
6. Astyris tuberosa Cpr., type specimen; 11833, 9 millimeters; color ig- 
MPR eee ce bace Eros GU enn semace as -oabss cbdecdooores opeceeepesus 213 
7. Ocinebra lurida Middendorf, typical form; 28473, 25 millimeters. ..-.--- 215 
8. Amphissa undata Cpr., typical; 56749, 12 millimeters; the color is ig- 
nored in ohisiand the next toures ss se ee oe ee nate == 214 
9. Amphissa versicolor Dall, short variety, 12277, 18 millimeters......-.... 213 
PEATE xoxele 
Fig. 1. Ovula (deflera Sby. var.) barbarensis Dall, from Miss Monk’s specimen; 
SORIA OLN Ses cts oso aie 416 SiSin'~ tetaictol bee eer ea on ya = earailo ns, cee 206 
2. Vitrinella? (Adeorbis?) Williamsoni Dall, 106856, front view; lat. 5.5 
PEGI ENTRY SNIPE <n  R  eeR n raesy Snes Oe ee aes Oe a eee 202 
Sehe same; trom below; 5.5 millimeters<.. -2- = eo eceese ac esc sees ce tees 202 
4. Bittium quadrifilatum Cpr., 32218, 12 millimeters........-.....---.---- 205 
5. Calliostoma splendens Cpr., 60671, basal diameter 5 millimeters -...---- 201 
6. Chlorostoma funebrale A. Adams, variety subapertum Cpr., basal view 
of type specimen showing umbilical pit; 50 millimeters, 123496. --.- 200 
7. Chlorostoma funebrale A. Adams, ordinary form; 30 millimeters, 59758.. 200 
8. Chlorostoma brunneum Phil., 60056, 28 millimeters........--.-....----- 200 
