Two cases of rare presentation of basal cell and squamous cell carcinoma on the hand.

Two cases of rare presentation in the form of basal cell carcinoma for 2-3 years and squamous cell carcinoma for 8-9 years after prolonged sun exposure are being reported. Both responded to surgical excision and 5-FU application.

Reproduction in common house rat, Rattus rattus rufescens (Gray), in semi arid region of Indian desert.

R. r. rufescens litter throughout the year with two peaks. The prevalence of pregnancy was maximum during early summer and postmonsoon seasons. Day length and day temperature influenced the breeding pattern which was supplemented by the availability of stored foodgrains in the habitat.