The new macro function %SYSFUNC (SASÂ® rel 6.12) allows access by the macro processor to most data step. functions and several SCL functions. Solutions to many. common macro tasks can now be simpler and more. efficient. In addition, many of the SCL functions allow the. programmer to manipulate external files directly from the.
Lancelet. Branchiostoma lanceolatum, or Amphioxus lan-ceolatus) , a chordate animal of subphylum Acrania (Cephalo-chordata). The body of the lancelet is transparent, up to 8 cm long, and pointed at both ends.The notochord extends into the anterior end of the body.The caudal fin is lancet-shaped.ranchiostoma lanceolatum, or Amphioxus lan-ceolatus) , a chordate animal of subphylum Acrania (Cephalo-chordata). The body of the lancelet is transparent, up to 8 cm long, and pointed at both ends. The notochord extends into the anterior end of the body. The caudal fin is lancet-shaped.
There are three major, and one very minor, groups of amphipods, but representatives of only one of them are likely to be commonly found in our tanks. The common type of amphipod is called a Gammaridean amphipod, and belongs to a grouping named after one of the more common fresh-water amphipodan genera, Gammarus.here are three major, and one very minor, groups of amphipods, but representatives of only one of them are likely to be commonly found in our tanks. The common type of amphipod is called a Gammaridean amphipod, and belongs to a grouping named after one of the more common fresh-water amphipodan genera, Gammarus.