142 CURRENT LITERATURE. 



iotia spiiiosa. There are notes on numerous other species, on the genera 

 Ctiloccrns and Lifpistcs, and en Ferry's Australian Shells. All the new species 

 are figured, in addition to many others, and figures of the operculum, jaw, and 

 radula of Venue tiis caperaiiis, Tate and May, are also given. 



Kesteven, H. L. — The Systematic Position of the genus Fossariiia, A. Adams 

 and Angus, and of Fossariiia ruiria, Hutton. Rec. Aust. Mus. , 1902, vol. iv, 

 PP- 317—322, fig.s. 28—35. 



From an examination of the radula and operculum of F. fatiila, the author 

 is of opinion that Minos, Hutton, is only a synonym of Fossariiia, which latter 

 genus should he placed in the Trocliidae, between Gibbiila and Mars^arita. 



Discussing next the F. i'(7mzof Hut-ton, the author shows that in addition to 

 anatomical differences, which he proposes to describe later, it has a subspiral 

 operculum, and a dentition showing relations to Littoriiia, it therefore becomes 

 necessary to propose a new genus for its reception, to which the name Risellop- 

 sis is given. The teeth, operculum and shell are figured and sdescribed, and a 

 new variety — cariiiata, described and figured. 



Willey, APthUP.— Contribution to the Natural History of the Pearly Nautilus. 



A. Willey's Zool. Results, 1902, pt. vi, pp. 691-830, pis. Ixxv-l.xxxiii, a map, 



and 33 figs, in text. 

 Although Dr. Willey failed to obtain material for the study of the embry- 

 onic development of the pearly Nautilus, he has given given a most interesting 

 account of his search for the same, and a valuable resume of previous work 

 upon Nautilus. Some of the new observations contained in the present memoir 

 have been already published in a preliminary form, they are now published in 

 detail, and relate principally to the following aspects of the subject : — binomics 

 (habits, range, oviposition), branchial sense organs (osphradia), mechanism of 

 respiration, injection of the vascular system, connections of the siphuncle, 

 innervation of the ophthalmic tentacles, development of the accessory sexual 

 organs, enumeration of the digital tentacles, orientation, and specific divergence. 

 When compared with its former world-wide distribution, the present 

 restricted range of the genus has a special interest. It is wholly confined to 

 the seas adjoining the islands of the Eastern Archipelago, which includes the 

 East Indies, Philippines, New Guinea and its dependencies, Solomon Islands, 

 New Caledonia, New Hebrides, and Fiji. The distribution of the species is 

 still mcne interesting. X.poiiipiHiis is never taken in the New Caledonian Group 

 of Islands, while N. inacroiiiphalns is never taken anywhere else. Of the three 

 species pompilins, iiiacroiiiplialns, and lunhilicatits, the first has the widest 

 known range, occurring in the Philippines, Moluccas, Bismarck Archipelago, 

 Torres Straits, New Hebrides, and 'Fiji ; the second is confined to the New 

 Caledonian Archipelago ; while the third overlaps that of the first. 



The paper is well illustrated by nine excellent plates, a map, and numerous 

 figures in the text. 



BePgh, R. — The Danish Expedition to Siam 1899-1900. Results of the Zoolog- 

 ical Collections made by Dr. Th. Mortensen. I. Gasteropoda opistho- 

 branchiata. Mem. d. I'Acad. Roy. de Danemark, 1902 (6th ser. Sect. d. 

 Sci.), T. xii, pp. 161-218, T. i-iii and map. 

 The list of the Opisthobranchia obtained by Dr. Mortenson includes seven 

 Tectibranchia, one Ascoglossa, and fourteen Nudibranchia. There are eight new 

 species and one new genus, viz., Aplysia iiiiintinda, Aplysiclla iiicerta, Aclcsia 

 ocelligera, Idalia plcbeia, Doriopsilla pallida, Marioiiia chloaiithes, Melibc 



