I assume as well that it must have a little stumpy willy in the middle to meet the regs. So the Williams has a willy and the Lotus has a man-gina.
IIRC the rules are on max chassis height at certain positions – the intention being to create lower noses to prevent cars riding over each other in crashes and to limit aero. There isn’t enough of a restriction on the minimum cross section of the nose though, so to meet the regs & gain the most aero benefit the solution is to minimise the forward (lower) section of the nose to gain max airflow under the car.
The Lotus solution is interesting – I guess it’s the camera angle that makes the nose look asymmetric but at first glance they’ll get smoother flow directly under the chassis whereas the anteater/finger/willy noses will be more disturbed after flowing round the proboscis.
Wonder what other options we’ll see.