ADDITIONS AND CORRECTJONS. 

 Trochus. 



Page 21, add PL 4, fig. 31, after T. triseralis. 

 Page 25, T. calllcoccus Phil., read PL d,fig. 95, not fig. 33. 

 Page 25, T. smaragdus, read PL 9, fig. 94, not fig. 39. 

 Page 26, Tr. gibberula Ad. is figured on PI. 9, fig. 4, 

 Page 35, T. bicrenaf.us, read PL 15, figs. 62-66, not PI. 16. 



T. (Infundibulops) firmus Philippi. 



Shell conical, solid, transversely sulcate, greenish, painted with 

 close purple streaks ; whorls a little subangular and plicate below the 

 sutures, the last rounded-angulate ; base nearly plane, obsoletely 

 cingiilate, false-umbilicate ; aperture rhomboidal ; columella very 

 oblique, simple. (PhiL) 



The shell is notably thick, rather conical ; the individual whorls 

 are level, angular above near the suture, and a little plicate, aj^pear- 

 ing somewhat terraced ; the last passes into the base with a blunt 

 angle ; the sculpture consists of about 7 weak smooth transverse 

 grooves on the upper surface, and about 4 scarcely elevated concen- 

 tric girdles on the base. The funnel-shaped pit occupying the place 

 of the umbilicus has a slightly elevated liration. The aperture is 

 rhombic, the columella very oblique, entirely simple. On a pale 

 green ground there are oblique purple-red streaks above ; the base 

 has red-spotted girdles. Alt. 18, diam. 22 mill. 



Peysian Gulf. 



Trochus solidus Jonas, in Mus. Hamburg., not of PhiL — Tr. firmus 

 Phil., Conchyl. Cab., p. 317, t. 45, f. 5. 



Allied to T. erythrcetis (page 40) but much smoother and differently 

 colored. 



Clancui-us. 



Page 79. Gibbula multicarinata Ten.- Woods.= CfancitZws nodi- 

 lirahis (=C. plebeius Phil., p. 79), according to Petterd, Quart. 

 Journ. of Conch., Leeds, 1889, p. 354. 



Page 80 (below middle of page). Claneulus plebeius, var. rubi- 

 cundus Migh., read PL l^,figs. 97, 98, not 77, 78. 



Clanculus rubicundus Dunker, Shell globose-conic, narrowly 

 umbilicated, rubicund ; whorls rounded, separated by canaliculate 



(467) 



