ch ior ▁was ▁born ▁in ▁Dresden ▁on ▁November ▁ 1 2 , ▁ 1 9 1 2 . ▁ ▁He ▁studied ▁at ▁the ▁University ▁of ▁Gött ingen ▁and ▁at ▁the ▁Dresden ▁Techn ical ▁University ▁( TH ▁Dresden ). ▁ ▁He ▁obtained ▁his ▁Ph . D . ▁at ▁Berlin ▁University ▁on ▁June ▁ 2 , ▁ 1 9 3 7 , ▁with ▁a ▁th esis ▁on ▁a ▁problem ▁on ▁the ▁theory ▁of ▁configurations ▁ad vised ▁by ▁Ludwig ▁B ie ber bach . ▁ ▁References ▁ ▁Category : 2 0 th - century ▁German ▁mathemat icians ▁Category : 1 9 1 2 ▁birth s ▁Category : P oss ibly ▁living ▁people <0x0A> </s> ▁H ap lo co ch lias ▁on an ey i ▁is ▁a ▁species ▁of ▁sea ▁sn ail , ▁a ▁marine ▁g ast rop od ▁m oll usk ▁in ▁the ▁family ▁Sk ene idae . ▁ ▁The ▁Database ▁of ▁Western ▁Atlantic ▁Marine ▁M oll us ca ▁cons iders ▁this ▁species ▁a ▁syn onym ▁of ▁H ap lo co ch lias ▁will iami . ▁ ▁Description ▁ ▁Distribution ▁This ▁species ▁occurs ▁in ▁the ▁G ulf ▁of ▁Mexico ▁and ▁in ▁the ▁Car ib bean ▁Sea . ▁ ▁References ▁▁ ▁Esp in osa ▁J ., ▁Or te a ▁J . ▁& ▁Fernández - G arc és ▁R . ▁ 2 0 0 5 . ▁Descri pción ▁de ▁tres ▁nue vas ▁especies ▁del ▁género ▁H ap lo co ch lias ▁Car p enter , ▁ 1 8 6 4 ▁( M oll us ca : ▁Gast rop