Measurement of exclusive $B$ decays to final states containing a charmed baryon

Using data collected by the CLEO detector in the ${\rm Y}\mathrm{}\left(4S\right)\mathrm{}$ region, we report new measurements of the exclusive decays of B mesons into final states of the type ${\Lambda }_c^{+}\overline{p}n\left(\pi \right),$ where $n=0,1,2,3.\mathrm{}$ We find signals in modes with one, two and three pions and an upper limit for the two-body decay ${\Lambda }_c^{+}\overline{p}.$ We also make the first measurements of exclusive decays of B mesons to ${\Sigma }_c\overline{p}n\left(\pi \right),$ where $n=0,1,2.\mathrm{}$ We find signals in modes with one and two pions and an upper limit for the two-body decay ${\Sigma }_c\overline{p}.$ Measurements of these modes shed light on the mechanisms involved in B decays to baryons.