30 THE VOYAGE OF H.M.S. CHALLENGER. 



May 14, 1875. Oosima, Japan. (No depth given.) 



Habitat. — Philippines (Cuming), and Port Jackson and Fiji (British Museum), Moluc- 

 cas (Rumph.), Japan (Liscbke). 



3. Acmcea virginea (Miiller). 



Patella virginea, Miiller, Prodr. Zool. Dan., 1776, p. 237. 



„ „ Wood, Ind. Test., p. 189, pL xxxviii. fig. 81 (Aemxa). 



„ ,, Lamarck Anirn. s. vert, (ed. Desh.), vol. vii. p. 543, sp. 50. 



Tectum „ Searles Wood, Crag. MolL Pal. Soc, vol. i. p. 161, pi. xviii. fig. 6. 

 Acmcea „ Forbes and Hanley, vol. ii. p. 437, pi. lxi. i. fig. 2. 

 Tectum ,, Gwyn Jeffreys, Brit. Conch., vol. iii. p. 248, vol. v. pi. lviii. fig. 4. 



„ ,, Morch, Faunula Moll. Islandioe, p. 32, No. 90. 



Acmaea „ Dall, Alaska Explor., U.S. Nat. Hist. Mus. Report, vol. i. p. 120. 

 Tectura „ G. 0. Sars, Moll. Reg. Arct. Norv., p. 121, No. 16. 



„ „ Gwyn Jeffreys, Moll. "Lightning" and " Porcupine," Proc. Zool. Soc. Lond., 1882, 



p. 671, sp. 1. 



Station 75. July 2, 1873. Lat. 38° 38' N., long. 28° 28' 30" W. Off Fayal, Azores. 

 450 fathoms. Volcanic mud. 



Habitat. — From Iceland (Morch) to St Helena, ranging from low water to 150 fathoms 

 (Jeffr.) 



Fossil.- — From the Upper Pliocene of Scotland, England, Norway, and Sweden. 



I have not quoted the Patella virginea of Cantraine (Bull. Acad. Brux., 1835, vol. ii. p. 395), 

 nor of Aradas and Benoit (Conch. Mar. Sicilise, p. 120, No. 303), nor have followed Dr Gwyn 

 Jeffreys in ascribing the species to the Mediterranean, as all these identifications are, according to 

 Monterosato (Enumerazione, p. 18), erroneous, and arise from a confusion of Midler's species, which is 

 not Mediterranean, with Acmcea unicolor, Forb., or Acmoca gussonii, Costa. 



Family Cocculinid^e, Dall, 1882. 

 Genera. 1. Cocculina, Dall. 2. Addisonia, Dall. 

 1. Cocculina, Dall, 1882. 

 Cocculina angulata, Watson (PI. IV. fig. 2). 



Cocculina angulata, Watson, Prelim. Report, pt. 16, Journ. Linn. Soc. Lond., vol. xvii. p. 38. 

 Station 203. October 31, 1874. Lat. 11° 6' N., long. 123° 9' E. Philippines. 20 

 fathoms. Mud. 



Shell. — Small, thinnish, with a strongish membranaceous epidermis, compressedly 

 patelliform, oval, witb a long convex anterior slope, a short slightly concave posterior slope, 

 wbile tbe compressed side slopes are very steep and very slightly convex ; there is a 

 blunt reverted tip, but no embryonic shell ; the surface is rayed with five smooth, rounded, 

 unequal riblets. Sculpture : Longitudinals — from tbe top proceed radiating riblets, wbich 



