230 Mr. Cosmo Melvill on the 



Haynes. Mr. J. Michael Williams has another specimen 

 approaching this. The dorsal covering matter seems to 

 have been twice deposited, causing a very rich effect, with 

 partial eclipse of the round white spots. This possibly may 

 be C. coimna (Perry, Conch., pi. xxi., f. 5), but the plate and 

 description are both bad, and identification difficult in con- 

 sequence. 



Connected with C. cribrarici'^ are an assemblage of seven 

 or eight species, all bearing considerable resemblance to it 

 in the disposition of marking. Of these, C. esontropia 

 (Duclos), a broader, more pyriform shell, is connected with 

 the type by C. Peasei (Sowb.), which is a translucent Sand- 

 wich Island variety, appertaining to both esontropia and 

 Gaskoinii. C. cribellimt (Gaskoin) is a dwarfed form, with 

 similar dorsal ornamentation. C. fallax (E. A. Smith) is 

 perhaps only a fine large, more pyriform variety of cribraria, 

 with smaller white spots and paler dorsal surface. C. 

 Gaskoinii (Reeve), of which I possess the type specimen 

 formerly in Mr. Gaskoin's collection, is a beautiful shell, 

 straw-coloured marking, with clear cut ocelli, but I have 

 very great doubt whether it be not an extreme form of 

 esontropia. C. Cnniingii (Gray)^ is more distinct, a very 

 graceful attenuated pyriform shape, resembling G. Macandrei 

 (Sowb.), and C. Beckii (Gaskoin), in a greater degree than 

 the other species. This last was included in the Trivia by 

 Messrs. H. & A. Adams, owing to some strange oversight. 

 The cribraricB more nearly run into each other than do 

 most of the sections of this genus, and though cribraria, 



:i C. Coxeni (Brazier). {Proc. Zool. Soc, 1873, pi. xlviii., f. 10). I have 

 seen the type in the National Collection, but would hesitate before relegating 

 it to the cribrarice, as Mr. Brazier proposes, the dentition being altogether 

 different. 



^ C. couipta (Pease) is but a variety of Cicmingii from the Kingsmill grou[) 

 (A. Garrett) and Phoenix Island (Harper Pease), a single example in each case. 

 The dorsal sinus is branched, hinting at some malformation in the mantle, the 

 result, however, being a beautiful little shell, now in the National Collection. 

 Cf. Sowb., T. C, pi. xxxi., f. 351. 



