Yeah, these are pithas, they come in different shapes and sizes and have different filings.
They all have distinct names too, for example chitol pita, bhapa pitha, patishapta, jhuri pitha, muthi pita and so on.
There's also the ornate nakshi pita and Bini pitha,
Bini pitha looks like a braid and I presume that's how it gets its name because Bini literally translates to braid, atleast in my dialect anyway.
This page may be of interest to you :
http://en.banglapedia.org/index.php?title=Pitha
Are pithas of bengali origin or south indian?