1921] Schmitt: The Marine Decapod Crustacea of California 283 
Similarly, more than half of the twenty-seven ‘“north and south”’ 
species, fourteen (52%), also find their northern limits along the 
Adaska coast from the Aleutians southward; none reach the Bering 
Sea, the above nine forms ranging northward being the only (5%) 
California species recorded so far north; of the other thirteen (48%) 
north and south forms, seven, Crago nigricauda, Callianassa longi- 
mana, Petrolisthes cinctipes, P. eriomerus,* Epialtus productus, 
Cancer antennarius, Uca musica, reach British Columbia; three, 
Spirontocaris snydert, Portunus cantusu, Scleroplax granulata, reach 
Puget Sound; one, Mwnidopsis quadrata, the coast of Washington; 
and two, Emerita analoga, Pachygrapsus crassipes, only go as far as 
the Oregon coast. The fourteen species reaching the Alaska coast but 
not found north of the Aleutians are: 
Pasiphaea pacifica 
Upogebia pugettensis 
Pagurus granosimanus 
Pachycheles rudis* 
Mimulus foliatus 
Cancer productus 
Cancer gibbosulus 
Cancer magister 
Cancer gracilis 
Cancer oregonensis* 
Lophopanopeus bellus 
Pinnixa occidentalis 
Hemigrapsus nudus 
Hemigrapsus oregonensis 
The southern limits of eighteen (67%) of the twenty-seven north 
and south species are found along the Lower California coast either 
at Magdalena Bay or at points intermediate between it and Todos 
‘Santos Bay ; only nine (83% ) range south of Magdalena Bay ; six, Pasi- 
phaea pacifica, Petrolisthes cinctipes, Pachygrapsus crassipes, Hemi- 
grapsus nudus, H. oregonensis, Uca musica, into the Gulf of Califor- 
nia; one, Mimulus foliatus, to Mazatlan; one, Munidopsis quadrata, in 
deep water to off the Tres Marias Islands, Mexico; and one, Portunus 
zantusit, to Chile. The eighteen north and south species not recorded 
south of Magdalena Bay are: 
Spirontocaris snyderi 
Crago nigricauda 
Upogebia pugettensis 
Callianassa longimana 
Pagurus granosimanus 
Emerita analoga 
Pachycheles rudis* 
Petrolisthes eriomerus* 
Epialtus productus 
Cancer productus 
Cancer antennarius 
Cancer gibbosulus 
Cancer magister 
Cancer gracilis 
Cancer oregonensis* 
Lophopanopeus bellus 
Pinnixa occidentalis 
Scleroplax granulata 
Of the fifty-three species ranging southward from California, 
twenty-three (48%) have not been recorded south of the Coronados- 
Magdalena Bay stretch, while thirty (57%) run farther south; six- 
teen, Palaemon ritteri,; Urocaris infraspims,; Periclimenes tenuipes,+ 
