37 



Stat. 66. South of Saleyer. 3 spec. 



Stat. 89. Pulu Kaniungan ketjil. i spec. 



Stat. 99. 6° 7'.5 N., 120° 26' E. i spec. 



Stat. 106. Kapul Island, Siilu Archipelago. 12 spec. 



Stat. 136. Ternate. 3 spec. 



Stat. 138. East coast of Kajoa Island. 8 spec. 



Stat. 143. 1° 4.5 S., i27°52'.6E. 4 spec. 



Stat. 144. Damar Island. 5 spec. 



Stat. 148. 0° i7'.6 S., I29°I4'.5E. 3 spec. 



Stat. 157. o°32'.9S., I30°I4'.6E. i spec. • 



Stat. 165. Daram Island. 4 spec. 



Stat. 169. Atjatuning, West coast of New-Guinea. 3 spec. 



Stat. 177'. 2° 30' S., 1 29° 28' E. 8 spec. 



Stat. 178. 2° 40' S., i28°37'.5E. i spec. 



Stat. 185. 3° 20' S., i27°22'.9E. 10 spec. 



Stat. 203. 3° 32'. 5 S., i24°i5'.5E. i spec. 



Stat. 215'. Kabia Island. 2 spec. 



Stat. 224. 5° 34' S., 127° 4' E. I spec. 



Stat. 243. 4° 3o'.2 S., i29°25' E. 8 spec. 



Stat. 276. 6°47'.5 S., i28°4o'.5 E. i spec. 



Stat. 303. Haingsisi, Samau Island. i spec. 



Stat. 315. -Sailus Besar, Paternoster Islands. i spec. 



Empty shells: 



Stat. 59. 10° 22'. 7 S., i23°i6'.5E. 2 spec. 



Stat. 95. 5°43'.5 N., ii2°4o' E. i spec. 



Stat. 139. o°ii' S., 127° 25' E. 3 spec. 



Stat. 165. Daram Island. i spec. 



Stat. i77\ 2° 30' S., 1 29° 28' E. 4 spec. 



This species is a very common form in the whole East-Indian Archipelago. In all the 

 specimens the dorsal ribs on the shell are very strong; they all belong to the form costata 

 Pfeffer (see above), which occurs abundantly in the Red Sea and the Indian Ocean. It is only 

 a variety of the type (Boas) ^). 



Subgenus Cavolinia (s. str.) Pelseneer. 



Hyalaca (part.) Auctorum. 



P leu r opus (part.) Auctorum. 

 1850. Diacria (part.) Gray, Catalogue of the Alollusca in the Collection of the British 



Museum, prt. II, Pteropoda, p. 10. 

 1886. Hyalaea, B Boas, Spolia atlantica, Bidrag til Pteropodernes Morfologi, etc., p. 92. 

 1888. Cavolinia (s. str.) Pelseneer, Challenger Rep. LXVI, p. 20. 



3. Cavolinia tridcutata (Forskal). 



1767. } Monoculus telemus Linne, Systema Naturae, 12"' Ed., vol. i, prt. II, p. 1059. 



1773. Anomia tridentata Forskal, Descriptiones animalium quae in itinere orientali obser- 



vavit, p. 124. 

 1783. Gioenia sp. .' Gioeni [fide Souleyet), Descrizione di una nuova Famiglia e di un nuovo 



Genere di Testacei trovati nel littorali di Catania. 



I) Spolia atlantica, p. 100. 



