1855.] Chusan Shells. 139 



This shell has a chatoyant reflection on the exterior of the valves, 

 of which the substance is not in the least degree pearly. The rostrated 

 end exhibits a faint trace of the fold which characterizes the Tel- 



" Found under the same circumstances as the last, and asserted 

 to be an inhabitant of the canals." 



Aeca galactodes, Benson. 



Testa subrhomboidea, tumida, subsequilaterali, antice subangulata, 

 postice rotundata, multiradiata ; radiis exilissimis aucta, rugis de- 

 cussantibus ; cardine mediocri, terminis exterioribus angulatis ; 

 natibus lsevibus remotiusculis, incurvatis ; margine lsevi ; epider- 

 mide fusca. Lat. 0.75, Long. 0.5, poll. 



This shell belongs to the sub-division of Area, which contains the 

 English marine species A. lactea and the Crag fossil A. lactanea* 

 Wood. It is sufficiently distinguished from both by its tumid 

 form ; its greater length from beak to base, in comparison with 

 its breadth, by the shortness of its cardinal line, and its more 

 equilateral form. As in those species, the teeth are vertical at the 

 centre of the hinge line, and inclined or radiate at the extremities. 

 The lozenge-shaped space between the beaks is occupied by nu- 

 merous raised lines, vertical to the hinge line, which are crossed 

 again by faint depressed lines, affording a firmer hold to the ligament 

 and performing the same office as the angulate concentric channels 

 or scorings in Byssoarea. 



" Found under the same circumstances as the last, and equally 

 asserted by the Chinese to be an inhabitant of the canals." 



Novaculina consteicta, (Lamarck.) 

 Testa alba, tenui, transverse oblonga, lseviuscula, extremitatibus 

 rotundatis, radio mediano subconstricta ; epidermide olivaceo-flaves- 

 cente, postice quasi capillis intertextis adhserentibus vestita. Lat. 

 2.45, Long. 0.75, poll. 



Solen constrictios, Lamarck, Vol. 5, p. 455. 



This shell, which Lamarck has described as Solen constrictus, and 

 which, on the authority of Peron, he considered to be from the 

 Chinese or Japanese seas, appears to have been a specimen of this 

 * Mag. Nat. Hist. Vol. IV. N. S. P. 232, PI. Supp. No. 13, f. 3. 



