MOLLUSCA. 17 



Fig. 7. Hinder end of the body of Spirilla Peronii (fig. 1, 4, 5, 6) : — twice the natural size. 

 Fig. 8. Hinder end of the body of Spirilla australis (fig. 2) : — twice the natural size. 

 Fig. 9. Hinder end of the body of Spirula reticulata (fig. 3) : — -four times the natural size. 

 *** The engraver has added to the original drawing the impressions round the aperture of the siphon, discovered by Charles Stokes, Esq. 



Fig. 10. Section of the hinder end of the mantle of Spirula reticulata, showing one of the terminal sacs of the 



visceral cavity. 

 Fig. 11. The specimen of Spirula Peronii, fig. 4, with the mantle laid open : — twice the natural size. 

 Fig. 12. Shows the relative position of the anus, k, the valvular apertures of the sacs of the venous (renal?) follicles, I, 



and of the generative outlet, m. The fig. k' shows the termination of the duct of the ink-bag, z, within 



the verge of the vent, k', magnified. 

 Fig. 13. Branchial and systemic hearts and venous follicles. 

 Fig. 14. The livers in situ, with part of its capsule dissected off. 

 Fig. 15. Cranium, acoustic sacs, digestive organs, branchiae, &c, of Spirula Peronii. 

 Fig. 15.* From M. De Blainville's Memoire Sur 1' Animal de la Spirula, "Annales Franchises et Etrangeres 



d'Anatomie et de Physiologie," torn. i. 1837. 

 %* In the preceding figures the same letters are used to denote the same parts, and are explained in the text. 



II. GASTEROPODA. 



1. CONVOLUTA. 



Out of from eighty to a hundred species of Cones collected during the voyage of the 

 Samarang, only four proved to be new, the greater number of those of recent discovery 

 having been anticipated by Mr. Cuming during his researches among the Philippine Islands, 

 and described in the ' Conchologia Iconica.' The genus Ovidum, not having been examined 

 since the publication of Mr. Sowerby's ' Species Conchylioruin,' afforded a greater amount of 

 novelty. Mr. Sowerby, junr., being engaged in preparing a monograph of this genus for 

 the forthcoming number of his ' Thesaurus,' it was thought desirable to place the specimens 

 collected in his hands for comparison, and we are indebted to him for the descriptions and 

 figures of eleven new species. A few species of Erato were collected, and in the genus 

 Cyincea, some interesting observations were made at Singapore upon some living specimens 

 of C. annulus in its early winged state, procured from the parent animal, and examined in 

 activity under the microscope. 



1. CONUS. 



1. Contjs papillaris. PI. V. Fig. 7 a, h. Con. testa fusiformi-oblonga, spira elevato-turrita, apice 

 papillari, anfractibus superne acute concavo-angulatis, peculiariter tenuicoronatis, nodulis subobliquis, 

 infra laevibus ; albida, aurantio-ferrugineo longitudinaliter strigato-nebulata. 



Hab. ? 



This remarkable species of Conus, undoubtedly new, was found amongst the shells 

 collected by Sir Edward Belcher during his voyage round the world in H.M.S. Sulphur, and 



p 



