Key to New Zealand Families of Hyperiidea (Adapted from Barnard, 1940) 1. Antenna 1 straight, 1st segment of flagellum large, the rest inserted terminally; ant. 2 straight in both sexes 2 Antenna 1 curved, 1st segment of flagellum large, the rest inserted subterminally; ant. 2 in male angularly folded (in Lycacopsidae rudimentary in male, absent in female) 7 2. Antenna 1 flagellum with few segments 3 Antenna 1 flagellum in male with many segments, filiform; in female very small, rudimentary or absent 5 3. Head large, swollen, mandible without palp Paraphronimidae Head not swollen 4 4. Antenna 1 flagellum elongate, styliform; mandible without palp; inner rami of uropods fused with peduncles; outer rami rudimentary in uropods 1 and 2, small in uropod 3 Scinidae Antenna 1 flagellum short, laminar, oval or lanceolate (terete in Cyllopus); mandible with palp; all rami of uropods well-developed, the inner rami not fused with the peduncles Vibiliidae 5. Uropods foliaceous, without rami; last peraeopod reduced Phrosinidae Uropods normal, with rami; last peraeopod normal 6 6. Mandible with palp Hyperiidae Mandible without palp Phronimidae 7. Peraeopod 4, 2nd segment not operculiform, the following segments articulated terminally 8 Peraeopod 4, 2nd segment operculiform, the following segments articulated subterminally 11 8. Antenna 1 attached to anterior surface of head; peraeopod 3 very slender; peraeopod 4 robust Lycaeopsidae Antenna 1 attached to inferior surface of head 9 9. Head not (or very slightly) produced in a rostral point 10 Head more or less produced in a rostral point Oxycephalidae 10. Gnathopods 1 and 2 simple Lycaeidae Gnathopods 1 and 2 prehensile, the expanded 5th segment forming a chela with the dactylos Brachyscelidae 11. Peraeopod 3, second segment normal Pronoidae Peraeopod 3, second segment operculiform 12 12. Peraeopod 5 normal Scelidae Peraeopod 5 rudimentary Platyscelidae Note.—In this paper, I have reckoned gnathopods 1 and 2 and peraeopods 1 to 5, as is usual with Gammaridae, and now common in many Hyperiid papers. It replaces the older custom of reckoning peraeopods 1 to 7. Checklist of New Zealand Species Family Scinidae Scina borealis (G. O. Sars), 1882. Barnard, 1930. Shoemaker, 1945. Scina crassicornis (Fabr.), 1775. Barnard, 1930. Shoemaker, 1945. Scina curvidactyla Chevreux, 1914. Barnard, 1930. Shoemaker, 1945. Family Vibiliidae Vibilia chuni Behning, 1913. Barnard, 1930. Vibilia propinqua Stebbing, 1888. Barnard, 1930. Vibilia antarctica Stebbing, 1888. Barnard, 1930. Vibilia armata Bovallius, 1887. Barnard, 1930. Vibilia pyripes Bovallius, 1887. Barnard, 1930. Vibilia stebbingi Behn. & Wolt., 1912. Barnard, 1930. See below. Vibilia viatrix Bovallius, 1887. Barnard, 1930. Shoemaker, 1945.