ita , ▁Kansas , ▁he ▁moved ▁to ▁the ▁West ▁Coast ▁and ▁entered ▁the ▁University ▁of ▁Oregon ▁as ▁a ▁ge ology ▁major . ▁▁ ▁After ▁gradu ating ▁with ▁a ▁B . A ., ▁H ert lein ▁en rolled ▁as ▁a ▁gradu ate ▁student ▁at ▁Stan ford ▁University . ▁He ▁received ▁his ▁doctor ate ▁in ▁ 1 9 2 9 . ▁His ▁dis sert ation ▁was ▁on ▁the ▁P li oc ene ▁foss ils ▁of ▁the ▁San ▁Diego , ▁California ▁area . ▁▁ ▁In ▁ 1 9 2 9 , ▁H ert lein ▁was ▁appointed ▁assistant ▁cur ator ▁of ▁the ▁Department ▁of ▁Pale ont ology ▁at ▁the ▁California ▁Academy ▁of ▁Sciences . ▁He ▁rose ▁to ▁become ▁the ▁cur ator ▁of ▁In verte br ate ▁Pale ont ology ▁and ▁elected ▁a ▁Fellow . ▁▁ ▁In ▁the ▁ 1 9 3 0 s , ▁he ▁tra ve led ▁to ▁the ▁Gal ap ag os ▁Islands ▁and ▁the ▁near sh ore ▁areas ▁of ▁Central ▁America ▁and ▁Mexico . ▁▁ ▁He ▁published ▁over ▁ 1 5 0 ▁papers ▁on ▁Rec ent ▁and ▁foss il ▁m oll us ks , ▁e chin od erm s , ▁and ▁bra chi op ods ▁from ▁California , ▁Oregon , ▁Washington , ▁and ▁Mexico . ▁ ▁On ▁many ▁occasions , ▁H ert lein ▁worked ▁with ▁U ly ss es ▁S . ▁Grant ▁IV , ▁who ▁was ▁a ▁class mate ▁at ▁Stan ford ▁and ▁who ▁also ▁worked ▁on ▁the ▁foss il ▁m oll us ks ▁of ▁California . ▁They ▁collabor ated ▁on ▁several ▁papers .