SIPHON ARIA. 



Species lo. (Fig. a, h, Mas. Cuniiii;;'.) 

 SlPHONAllIA .EmULORATA. Siph. lesld ohtOH(JO-UVal(i, 



irregulari, conwxo-depressd, vertke micmatd, dense 

 rude Urutd, nmrgine terme deniiculato ; nordide fused, 

 iiiliis pitrpiirm-castuned. 



The fringei) Siphonakia. Shell oblong-ovate, irregu- 

 lar, coiivexly depressed, uncinate at the top, densely 

 rudely ridged, margin tinely denticulated ; dirty 

 brown, purple-ciiestnnt within. 



Gkay, MS., Mus. Curaing. 



Hcd). Mazatlan. 



Closely allied to S. deidicidata, but uiieniate at the top 

 and more iinely sculptured. 



Species 16. (Fig. a, b, Mus. Cuming.) 



Sll'llONAElA PICA. ShpJt. testa omtd, cu/irexd, certice 

 siibacuminatd, radktim costatd, costisforllbics, dlstan- 

 tihus, interstitiis striatis ; inius exlusgue aird, costis 

 albis. 



The pied Siphonakia. Shell ovate, convex, rather 

 acuminated at the top, radiately ribbed, ribs strong, 

 distant, striated in the interstices ; black, ribs white, 

 black within and without. 



SowERBY, Pro. Zool. Soc. 183.5, p. t;. 



Hah. Acapulco. 



Well characterized by its distant white ribs np(jn a black 

 ground. 



Species 17. (Fig. a, b, Mus. Cuming.) 

 Siphonakia Brasiliana. Sipk. testa omtd, depnssim- 

 culd, dense cm'ritgato-costatd, vertice obtnso ; sordidi 

 albicante, intiis fmco-uiyro eleynnler Hiimld. 



The Brazilian Siphonakia. Shell ovate, rather de- 

 pressed, closely corrugately ribbed, top obtuse ; dirty 

 white, within elegantly lineated with brown-black. 



llah. Rio Janeiro. 



;V rather depressly close-ribbed shell, elegantly pencilled 

 with brown-black in the interior. 



Species 18. (Fig. u, li, Mus. Cuming.) 



Sipli. testa ovatd, sabirreyn 

 dens} striata, striis niyrit 



Mphonabia palpebrum. 

 lari, convexd, radUdii 

 e/n-atiiiscif/is. 



The eye-lid Siphonakia. Shell ovate, somewhat irre- 

 gular, convex, radiately densely striated, strise black, 

 slightly raised. 



Jfab. Lisbon. 



Sculptured 

 black strife. 



d the margin with closely-set pencilled 



Species 1',). (Fig. a, li, Mus. Curaing.) 



Siphonakia costata. Siph. testa omtd, aciiminato-coH- 

 ve.m, teniii, vertice uncinato, radlatim corriigato-cos- 

 fatd, costis interdum partim obsoletis ; sordidi ciuered, 

 iniiis purpureo-rnfd. 



The ribbed Siphonakia. Shell ovate, acuminately con- 

 vex, thin, top uncinate, radiately wrinkle-ribbed, ribs 

 sometimes partially obsolete ; dull ash, interior nur- 

 ple-red. 



SowERBY, Pro. Zool. Soc. 1835, p. 0. 



Huh. Guacama, Central America. 



Of rather tin 

 interior. 



i'th, dec 



lie-red in tin 



