ALLAN HANCOCK PACIFIC EXPEDITIONS 

 VOLUME 20 



INDEX 



References to illustrations are in bold face type. 



abbotti, Lithophaga, 9, 95, 101, 102 

 Acar, 188, 193 



bailyi, 189, 190,222 

 insularis, 241 



domingensis, 190 



gradata, 188, 189, 190, 191, 192, 

 219,241 

 gradata, 188 

 panamensis, 188 



panamensis, 189 



pernoides, 189, 190 



pusilla, 178, 189, 190, 191, 223, 241 

 insularis, 191 



reticulata, 190, 191 

 (Acar) pernoides, Barbatia, 190, 191 



reticulata, Barbatia, 189 



rostae, Barbatia, 188 

 achatinus, Mytilus, 30 

 adamsi, Arcopsis, 193 

 adamsiana, Hormomya, 9, 10, 14, 37, 



39,45,47, HI, 161 

 adamsianus, Mytilus, 9, 37, 46 

 Adula, 6, 16, 18,88,91 



californiensis, 10, 14, 85, 89, 90, 91, 

 136,173 



diegensis, 11, 85, 88, 89, 91, 136, 

 173 



falcata, 11,89, 135, 173 



soleniformis, 14, 89, 90 



stylina, 14, 90 

 aequatorialis, Anadara (Cunearca), 



194, 205, 206, 207, 230, 247 



Area, 206 

 albus, Mytilus, 9, 31 

 algosus, Mytilus, 9, 25 



Semimytilus, 9, 10, 11, 12, 13, 14, 

 24,25,27,28,32,110,163 

 alternata, Barbatia (Calloarca), 178, 



186,219 



Byssoarca, 186 

 americana, Lunarca, 208 



Modiola, 67 

 americanum, Amygdalum, 10, 69, 70, 



125,171 

 americanus. Modiolus, 58, 60, 61, 66, 67, 



123, 167 



Mytilus, 9, 33 



Amygdalum, 18, 68 



americanum, 10, 69, 70, 125, 171 



arborescens, 69 



beddomei, 69, 71 



dendriticum, 68, 69 



pallidulum, 13, 69, 70, 71, 73, 123, 



171 

 politum, 69 

 (Amygdalum) arborescens, Modiolus, 

 10, 71 



sagittatus. Modiolus, 70 

 Anadara, 193, 199 

 baughmani, 194 

 emarginata, 194 

 formosa, 194 

 gordita, 201 

 larkinii, 195 

 similis, 195 

 (Anadara), 193, 194, 195,201 



tuberculosa, 178, 195, 226, 243 

 (Cara), 194,203,205 

 (Cunearca), 193, 199,205 



aequatorialis, 194, 205, 206, 

 207, 230, 247 



brasiliana, 194 



chemnitzi, 194,206 



incongrua, 194 



nux, 194, 205, 207, 229,249 



perlabiata, 194, 206 

 (Larkinia), 193, 195, 199 



grandis, 178, 195,226 



multicostata, 193, 196, 197, 199, 

 200, 226 

 (Rasia), 194,201 

 (Scapharca), 193, 194, 196, 199 



auriculata, 194 



aviculaeformis, 194, 202, 204, 

 228, 245 



biangulata, 194, 196, 200, 201, 

 202, 202, 204, 228 



concinna, 194, 201 



cumingiana, 178, 194, 196, 200, 

 228 



emarginata, 203, 204, 229, 245 



gordita, 194,200 



notabilis, 194 



obesa, 194, 205, 207, 229, 249 



[251] 



SMiTHSOiMlAiv 

 INSTITUTION 



MAR S 4 I860 



