25 



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122. i°58'.5 N., 125° o'.5 E. 



125. Sawan, Siau Island. 



128. 4° 27' N., r25°25'.7 E. 



130. 5° o' N., i25°26'.5E. 



136. Tcniatc. 



138. Kajoa Island. 



141. 1° o'.4 S., i27°25'.3 E. 



143. 1° 4'.5 S., i27°52'.6E. 



146. o°36' S., i28°32'.7E. 



148. 0° ij'.C) S., 129° 14'. 5 E. 



149. Fau, West-coast of Gebé Island. 

 157. o°32'.9 S., 130° h'.óE. 



165. Daram Island. 



169. Atjatuning, West coast of New-Guinea. 



172. Between Gisser and Ceram-Laut. 



174. Waru Bay, North coast of Ceram. 



177'. 2° 30' S., 129° 28' E. 



185. 3° 20' S., I27°22'.9E. 



189'. 2° 22' S., 126° 46' E. 



193. Sanana Bay, East coast of Sula Besi. 



194—197. i°53' S., 127° o' E. 



203. 3°32'-S S., i24°is'.5 E. 



205. Lohio Bay, Buton Strait. 



210'. 5° 26' S., 121° i8' E. 



213. Saleyer. 



2I5'*. North-point of Kabia Island. 



217. 6°4o'.6 S., i23°i4'.7E. 



220. Pasir Pandjang, West coast of Binongka. 



223. 5°44'-7 S., i26°27'.3E. 



224. 5° 34' S., 127° 4' E. 



225. Near the Lucipara Islands. 

 243. 4°3o'.2 S., 129° 25' E. 

 245. 4°i6'.s S., i30°i5'.8E. 

 252. W^est-side of Faam Island. 

 276. 6°47'.s S., i28°4o'.5 E. 

 282. 8°25'.2 S., i27°i8'.4E. 



315. Sailus Besar, Paternoster Islands. 



4 spec. 



2 spec. 



3 spec. 

 Az 70 spec. 



18 spec. 

 17 spec. 



14 spec. 

 ± 30 spec. 



2 spec. 



5 spec. 

 5 spec. 

 5 spec. 



± 15 spec. 

 33 spec. 



1 spec. 



3 spec. 

 ± 25 spec. 



4 spec. 

 10 spec. 



2 spec. 

 10 spec. 

 27 spec. 

 25 spec. 



12 spec. 



5 spec. 



3 spec. 

 25 spec. 



± 35 spec. 



9 spec. 



± 40 spec. 



13 spec. 



4 spec. 

 ± 40 spec. 



9 spec. 



15 spec. 

 12 spec. 



± 50 spec. 



A great number of specimens were caught; this species is perhaps more abundant than 

 the foregoing one. 



Crcscis virgula and Creseis aciiu/a e.xhibit man)- variations, and a large number of 

 distinct "species" has been distinguished, as may be seen from the list of synonyms. Souleyet, 

 however, ah'eady affirmed ') that the ditïerence between virgula and aciatla consisted only in 

 the curvature of the shell, and Boas '), after examining a great number of both species from 

 the Indian and Pacific Ocean, was of opinion that the forms virgula and acicicla were only a 

 single species. The dorsally curved shell of virgula passes so gradually into the straight shell of 

 acicula, that it is almost impossible to say, where the limits are between the two species (See 

 in his work, pi. 6, fig. 94). 



1) V^oyage de la Bonite, Zoölogie, vol. II, p. 196. 



2) Spolia atlantica p. 61. 

 SIBOOA-EXPEDITIE LH. 



