FROM TUB SOLOMON ISLANDS. 553 



Other specimeus in the British Museum are from the Fiji 

 Islands and New Caledonia. 



64. RissoiNA CLATHRATA, A. Adams, Proc. Zool. Soc. 1851, p. 265; 

 Schwartz von Mohrenstern's Monograph, Denkschrift. Akad. Wissen- 

 schaft. fViev, 1861, vol. xix. pt. 2, p. 154, pi. vi. f. 49. 



Hab. Strong Island. Caroliiie group {Brazier) ; Philippine Islands 

 (Cuming); New Holland {Paris Museum, teste Schwartz). 



The spiral lirse in the upper whorls are three in number, and 

 twice as many in the body-whorl, the lowest one being very thick, 

 indeed double as thick as the others ; the longitudinal costations 

 or lirations are about eighteen, somewhat obliquely arcuate and 

 minutely nodulous at the points of junction with the transverse 

 lira?. The length of the largest Philippine specimen is 12 millim., 

 diameter 3^. The shells from the Caroline Islands are much 

 smaller, being only 7 mill, long and 2^ broad. 



65. R. CANALICULATA, Schwartz von Mohrenstern's Monograph, 

 Denkschrift. Akad. IVissenschaft. Wien, 1861, vol. xix. pt. 2, p. 12.3, 

 pi. ii. f. 18. 



Hab. San Christoval, Solomon Islands {Brazier) ; Philippine Islands 

 {Schwartz). 



This species is very closely related to the B. scalariana of A . 

 Adams, from which it chiefly differs in its larger size and more 

 numerous ribs. 



66. R. MYOSORoiDES, Recluz, var., Schwartz von Mohrenstern, Denksch. 

 Akad. Wissenschaft. Wien, 1861, vol. xix. pt. 2, p. 134, pi. iv. f. 30. 



Testa cylindraceo-ovata superne acuminata, alba (interdum circa medium 

 anfractuum obscure roseo tincta); anfractus 8i, apicales 2h laeves 

 convex! vitrei, ceeteri convexiusculi, sutura parum obliqua sejimcti, 

 costis aliquanto arcuatis et obliquis circiter 17, et spiraliter minutis- 

 sime striati ; anfr. ultimus costis flcxuosis ad basira continuis et 

 dimidio iufero liris spiralibus tenuibus inter eostas cincto ; apertura 

 obliqua, mediocris ; labrum extra late incrassatum et costulis tenuibus 

 ornatum ; columella medio paulukim arcuata tenuiter callosa ; canalis 

 mediocriter profundus, obliquus. Long. 5\ mill., diam. 2. 

 Hab. San Christoval, Solomon Islands (Brazier) ; Mauritius {Sch^cartz). 

 The ribs on the body-whorl are rather more numerous than on 

 the upper whorls, and gradually more slender as the labrum is 

 approached, three or four being situated on the thielccning with- 

 out it. I liave given the above description, as the specimens from 

 the Pacific offer a few slight differences from the examples found 

 at the Mauritius. In the former only two or three of the apical 



