1885.] 'lightning' AND 'PORCUPINK ' EXPEDITIONS. 41 



the 'Annals and Magazine of Natural History' for October 1876 

 and March 1883. I have verified the description. 



3. x'^.DEORBis FRAGiLis, G. O. Sars. 



A.fragilis, G. O. Sars, Moll. reg. arct. Norv. p. 213, t. 22. 

 f. 19, a-c. 



'Porcupine' Exp. 1870: Atl. 16, 27. 



Distribution. Loffoden I. and western coast of Norway ; 60- 

 190 fms. 



Somewhat resembling A. pulchralis of the Coralline Crag, but of 

 a thinner texture, the s[)ire ujore raised, the whorls more convex, 

 the sculpture much slighter and irregular, and the umbilicus more 

 open. 



This and the next species appear to be closely allied to Fussarus, 

 the position of v\hich genus has not been satisfactorily determined : 

 it was placed with Solarium by Woodward, in the Littorina family. 

 According to Troschel, the dentition of Fossarus agrees in some 

 respects with that of Turritella. 



4. Adeokbis DEPRESSus, Seguenza. (Plate IV. figs. 8, 8 a.) 



Fossarus depressus, Seg. Bull. Real. Coinit. Geol. Ital. 1874, 

 fasc. ii. p. 382. 



'Porcupine' Exp. 1870 : Atl, St. 24, 30. 



Distribution. Algiers {Weinkauff, as Fossarus ci-ossei of Kleiak)!, 

 Strait of Messina {Seguenza and Granata) !, Palermo {Monterosato), 

 Brindisi {Aradas)\ ; 11-108 fms. 



Fossil. Pliocene : Messina {Seguenza). 



This pretty little shell, examined under a microscope, is exquisitely 

 sculptured by close-set longitudinal folds and intermediate spiral 

 striae, or thread-like lines. Some specimens have the whorls more 

 or less disunited in cornucopia fashion. It seems to connect Adeor- 

 his with Fossarus. 



According to tiie catalogue of Kleiak's collection of Dalmatian 

 shells his Natica crosseana is a synonym of Fossarus petitianus, 

 T\hen:=Stomatia azonea, Brusina. 



Fossarus reticulatus, S. Wood. (Plate IV. fig. 9.) 



Lacuna reticulata, 8. Wood, Mon. Crag Moll. vol. i. p. 122, t. xii. 

 f. 10, and t. XV. f, 12. 



Fossarus interjiincttcs, Jeffreys, MS. 



Shell oblong, rather solid, semitransparent, lustreless : sculpture, 

 numerous, curved, and rather sharp longitudinal ribs which cover 

 the last or body-whorl ; these and their interstices are crossed by 

 more numerous close-set and minute spiral striae, but not so as to 

 cause cancellation ; the upper whorls are quite smooth : colour light 

 yellowish brown : spire somewhat elongated or extended, and ending 

 in a blunt point : whorls 4, rather convex, the last disproportionately 

 large, the U|)perinost bulbous and intorted : suture deep : mouth 

 oval: outer lip i\\\ck: inner lip attached to tlie pillar: umbilicus 



