Is there a name for the kinds of melons that have smooth rinds and a name for the kinds of melons that have rough/bumpy textured rinds ?

You can bet that every common form of natural food has its own name. Muskmelons, persian, or netted melons (Cuucumis melo reticulatus)all have a netted rind. Cantaloupes (C. m. cantalupensis) has a rough skin. Casabas (C. m. inordorus) have a wrinkled skin. Honeydews and princes, also C. m. inordorus, have a smooth skin, as do water melons (Citrullus lanatus) But there are no terms that designate just the smooth-skinned melons or just the rough-skinned melons.

Minn.,

I found this bit of info about reticulatus groups and cantalupensis groups at, (see 10/19 Q)

http://www.almanac.com/cgi-bin/questionbackwards.pl?days=5

But I can't find the difinitions for these words in my dictionary.

They're taxonomic terms; terms that rarely appear in dictionaries. Try the following:

http://translate.google.com/translate?hl=en&sl=es&u=http://www.puc.cl/sw_educ/hortalizas/html/melon/diversidad_melon.html&prev=/search%3Fq%3DC.%2Breticulatus%26start%3D40%26hl%3Den%26lr%3D%26ie%3DUTF-8%26oe%3DUTF-8%26sa%3DN