APPENDIX B. 



REPORT on the Cecid2e collected by H.M.S. Challenger during the 

 Years 1873-76. By Leopold, Makquis de Folin. 



C^CID^E, Gray, 1847. 



1. Parastrophia, de Folin, 1875. 



Parastrophia challengeri, de Folin (Gmcid&, PL I. fig. 1). 



Parastrophia challengeri, de Folin, Caecidee of the Challenger Expedition, Proc. Zool. Soc. Lond., 1879, 



p. 806. 



Station 186. September 8, 1874. Lat. 10° 30' S., bug. 142° 18' E. Wednesday 

 Island, Cape York. 8 fathoms. Coral mud. Surface temperature 77°'2 F. One 

 specimen. 



Testa minuta, tubularis, tricurvata, subopaca, alba, nitida, minutissime et irregulariter 

 transversim striata ; apicem versus paululo tumidula. Apertura obliqua, baud marginata. 

 Length, 0-09 in. Breadth, "008 in. 



The apes of this specimen has been broken and restored ; so that its original form is somewhat 

 obliterated. The species presents the usual slight swelling at the beginning of the curve, a little 

 way from the apex. It has three curvatures. The aperture is oblique. From Parastrophia asluriana, 

 de Folin (see Les Fonds de la Mer, vol. i. pp. 174, 218, pi. xxix. fig. 7) it differs in that the shell 

 here is shorter, the curves stronger, while the annular striations are much finer and are differently 

 arranged. Its form distinguishes it from Parastrophia cornucopia;, de Folin (Les Fonds, &c, vol. i. 

 pp. 122, 174, 218, pi. xv. figs. 7—9). The absence of the characteristic apex is a feature noticeable 

 here, as well as in some specimens of Parastrophia asturiana [which yet present all the other 

 characteristics of the genus. In a shell so sharp at the point a fractured apex is not wonderful ; it 

 doubtless occurs through accident ; and the injury isTrepaired, and the traces of it concealed, by 

 a deposition of shelly matter. 



(zool. CHALL. EXP. — part xlii. — 1880.) Tfc 86 



