REPORT ON THE ASTEROIDEA. 403 
Chorological Synopsis of the Species herein mentioned. 
Ocean. | Range in Fathoms. Nature of the Sea-bottom. 
Ophidiaster attenuatus . | Atlantic. 450 | Volcanic mud. 
Ophidiaster cylindricus : esha Leas 2a0Re Shallow water. | On the reefs, 
pelago, and Pacific. | 
Ophidiaster helicostichus . | Eastern Archipelago. 6 | Coral mud. 
Ophidiaster ophidianus . | Atlantic. 450 | Volcanic mud. 
| Ophidiaster tuberifer . . | Eastern Archipelago. 8 | Coral mud. 
1. Ophidiaster attenuatus, Gray. 
Ophidiaster (Hacelia) attenuatus, Gray, 1840, Ann. and Mag. Nat. Hist., vol. vi. p. 284. 
Asterias cortacea, Grube, 1840, Actin. Echin. u. Wiirm. d. Adriat. u. Mittelmeers, p. 22. 
Ophidiaster attenuatus, Miiller and Troschel, 1842, System der Asteriden, p. 29. 
Locality.—Station 75. Between the Islands of Fayal and San Jorge, Azores. July 
2, 1873. Lat. 38° 38’ 0” N., long. 28° 28’ 30” W. Depth 450 fathoms. Volcanic mud. 
Surface temperature 70°:0 Fahr. 
2. Ophidiaster ophidianus (Lamarck), Agassiz. 
Asterias ophidiana, Lamarck, 1816, Hist. nat. anim. s. vert., t. i. p. 567. 
Ophidiaster ophidianus, Agassiz, 1835, Mém. Soc. Sci. Nat. Neuchatel, t. i. p. 191. 
Ophidiaster aurantius, Gray, 1840, Ann. and Mag. Nat, Hist., vol. vi. p. 284. 
Locality.—Station 75. Between the Islands of Fayal and San Jorge, Azores. July 
2, 1873. Lat. 38° 38’ 0” N., long. 28° 28’ 30” W. Depth 450 fathoms. Volcanic mud. 
Surface temperature 700 Fahr. 
Remarks.—I have referred with doubt to this species a single small example which 
measures R=13°5 mm. ‘The specimen is almost too small for accurate determination, but 
the form of the rays and the general character seem to me to be those of the species in 
question. 
3. Ophidiaster cylindricus (Lamarck), Miiller and Troschel. 
Asterias cylindrica (pars), Lamarck, 1816, Hist. nat. anim. s. vert., t. ii. p. 567. 
Ophidiaster cylindricus, Miller and Troschel, 1840 (April), Monatsber. d. k, preuss, Akad. d. Wiss. 
Berlin, p. 103; System der Asteriden, p. 29. 
Dactylosaster cylindricus, Gray, 1840 (December), Ann. and Mag. Nat. Hist., vol. vi. p. 283. 
Lnnckia cylindrica, v. Martens, 1866, Archiy f. Naturgesch., Jahrg. xxxii., Bd. i. p. 85. 
Ophidiaster asperulus, Liitken, 1871, Videnskab. Medd. naturh. Foren. i Kjébenhavn, p. 274, 
tab. v. fig. 4. 
Locality.—Kandavu, Fiji Islands. On the reefs, 
