76 M. O. A. L. MORCh's review of the VERMETID^. [Feb. 11, 



Var. ^. BADiA. 



Differt a prcBcedente T. angustiore crassiore et colore badio. 



Diam. aperturse 4 m. 



Hab. I. Philippin. (Mus. Cuming, specimen detritum), 



16. Thylacodes sauAMiGERus, Carp. 



T. majore, flavido-albida, solute spirali, pleriimque glomerata ; 

 superficie costis spiralibus, squamis instructis, costulis pluribus 

 iniercalantibus ; squamulis minoribus ; squamis et squamulis 

 imbi'icatis ; interdum aperturam versus sculptura obsoleta 



(Carp.). 



Aletes squamigerus, Carp. Proc. Zool. Soc. 1856, p. 226; Carp. 

 Report, p. 324. 



Hab. St. Barbara (sp. magn. glomer. in Mus. Nuttaliy, St. Diego 

 QIus. Goidd). 



A fine group of this shell is in Mr. Nuttall's collection. It agrees 

 in the main with the Mazatlan species, but diifers in colour and 

 sculpture. Mr. Nuttall believes that he found another species with- 

 out scales. (Carpenter.) 



I refer this shell to the present genus, because I believe it is spe- 

 cifically identical with the following variety. 



Var. a. PENNATA. 



T. solitaria, tenuis, laqueatim torta, aperturam versus arapliata ; 

 anfr. inferne incequales, planiusculi ; lirce longitudinales com- 

 pressiusculce, noduloso-serratce, alternatim minores, interstitiis 

 interdum Urula parva intercalante ; lirce incrementi scepe casta- 

 nei vel badii, conferte anguloso-undatcB, pulcherrimce, prcesertitn 

 si versus lucem teneas, in intersectionibus lirarum incrassatts, 

 unguiculatce, squamifert^ ; apertura orbicularis. Color in/erne 

 albus, fascia violaceo-fusca, superne flavescens ; linece hie illic 

 badice vel nigrce strigisque transversis Jlexis ; anfr. primi cas- 

 tanei ; faucibus albis, macula badia inferne juxta aperturam. 

 Diam. aperturse 10 m. 



Vermetus margaritarum, Voy. de la Venus, pi. 11. f. 2 (fig. mi- 

 nor) ; Chenu, 111. pi. 4. f. 2 (copy). 

 ilab, California (JSlus. Cuming). 



This shell differs chiefly from T. decussatus, Gm., which is its 

 West Indian analogue, in the larger calibre of the whorls. The 

 strise of growth are bent in a beautiful manner, giving the lirse a 

 pennate appearance, which is best seen when the shell is held against 

 the light. Although Carpenter does not mention the transverse 

 black lines, yet I suppose that this shell is the young of Aletes 

 squamigerus, because Carpenter (Cat. p. 303) states that the Aletes 

 centiquadrus, var. imbricatus, has some characters in common with 

 the young of the great Californian Vermetid Aletes squamigerus. 

 The figures quoted are exceedingly like the variety, but the whorls 

 are somewhat too narrow. 



