MAZATLAN ITNITALVES 243 



tion, and closer wrinkles entering the umbilicus. On one (dead) 

 specimen however the radiating rugne are coarse, not inter- 

 rupted by spiral lines ; the periphery also is more adherent to 

 the penultimate whirl. Four (perfect) specimens only were 

 found of this exquisitely beautiful species. Long. '02, lat. ■052 

 by -OlS. Biv. about 170". 

 Hah. — Mazatlan : off Spondylus calcifer, extremely rare ; 



L'pool Col. 



Tablet 1154 contains one specimen. 



304. VlTEINELLA PEEPARVA, C. B. Ad. var. NODOSA. 



V. t. discoided, planafd, quadratci, suhh/alina ; carinis dtuihus 

 ipiralibus infra et supra pevipheri am planatam, quarumpostica 

 nodosa ad marginem spiralem est; hasi rugulis radiantihus 

 distantihus ornata ; carina parum expressd regionem umbili- 

 calem magnam circumeunte ; aperturd quadratd ; anfr. ult. 

 hand declivi. 



Pan. Shells, no. 265, pp. 187, 316. 

 V. nodosa, P. P. C. Cat. Prov. 



The characteristic coronation of the upper teel is not men- 

 tioned by Prof. Adams ; it is however very conspicuous in the 

 specimen sent to Mr. Cuming. It is possible that the specimen 

 he described is another species, in which case the name which 

 I had giyen may be retained for this. It closely resembles in 

 onthne a smooth, crenated Dundry Ammonite. In Mr. Cum- 

 ing's specimen, there are one and a half normal whirls ; there 

 also appears a slight labial deposit. The only specimen foimd 

 at Mazatlan is immature, and measures long. '0075, lat. '033 

 by -027, div. 175°. 



JUab. — Panama ; 3 sp. in sand ; C. B. Adams. — Mazatlan ; 

 1 sp. off Spondylus ; L'pool Col. 



Tablet 1155 contains the specimen. 



305. VlTEINELLA EXIGUA, C. B. Ad. 



V. t. subdiscoided, alhd, anfraciibus iv. et triente ; carinis iii. 

 maxime prominentibus, acutis, angulatis, hand serratis, quarwm 

 una ad peripheriam, una antica, una postica in spird sitce su7it ; 

 angulo circa umbilieum magmim plus minusve monstrante ; striis 

 exillimis spiralibus told superjicie ornatd ; lirulis radiantibus 

 plus 7nin,usve distantibus et infra et supra decussantibus, circa 



