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A reanalysis of the (seemingly very distant) open cluster Shorlin 1, thegroup of stars associated with WR 38 and WR 38a, is made on the basis ofexisting UBV and JHKs observations for cluster members. The 2MASS observations,in particular, imply a mean cluster reddening of E(B-V)=1.45+-0.07 and adistance of 2.94+-0.12 kpc. The reddening agrees with the UBV results providedthat the local reddening slope is described by E(U-B)/E(B-V)=0.64+-0.01, butthe distance estimates in the 2MASS and UBV systems agree only if the ratio oftotal-to-selective extinction for the associated dust is R=Av/E(B-V)=4.0+-0.1.Both results are similar to what has been obtained for adjacent clusters in theEta Carinae region by similar analyses, which suggests that `anomalous' dustextinction is widespread through the region, particularly for groups reddenedby relatively nearby dust. Dust associated with the Eta Carinae complex itselfappears to exhibit more `normal' qualities. The results have directimplications for the interpretation of distances to optical spiral armindicators for the Galaxy at l=287-291 degrees, in particular the Carina armhere is probably little more than ~2 kpc distant, rather than 2.5-3 kpc distantas implied in previous studies. Newly-derived intrinsic parameters for the twocluster Wolf-Rayet stars WR 38 (WC4) and WR 38a (WN5) are in good agreementwith what is found for other WR stars in Galactic open clusters, which was notthe case previously.

WR 38/38a and the ratio of total-to-selective extinction in Carina