CNE systems work within a closed-loop environment; that is, they perceive their ( perhaps artificial ) environment directly, rather than through human input, as is typical in " Limulus polyphemus " on a Connection Machine ( Model CM-2 ).
12.
While it is clear that the American horseshoe crab " Limulus polyphemus " is distinct from the remaining extant species of horseshoe crab, relationships within the Asian horseshoe crabs remains uncertain . " T . gigas " has a chromosome number of 2 " n " = 28, compared to 26 in " T . tridentatus ", 32 in " Carcinoscorpius ", and 52 in " Limulus ".