610 MAZATIAN ITNIVAIVES 



serrantihus; aperturd subelongatd; lahro intus vm..-dentato ; 

 labioparum extante, secundum strias spirales ad hasinindentato. 



This species is described from yoixng shells and fragments 

 of adults. Portions of about a dozen specimens were found. 

 Tlie sculpture more resembles Metula, but the mouth is 

 Anachoid. The ribs are not distinctly marked, except in the 

 young shell ; but \mdulate, with the interstices as in Pisania. 

 The length of the adixlt is not known ; lat. "13, long, apert. '1, 

 div. 40". 



Sab. — Mazatlan ; extremely rare, off Spondylus ; Upool Col. 



Tablet 2428 contains 3 young shells and fragments. 



651. Anachis pygm^a, Sow. 



Columbella pygmsea, Soio. Froc. Zool. Sac. 1832, p.' 119 : — Tkes. 



Conch, p. 141, no. 89, pi. 40, f. VdZ.—Mull. Syn. Nov. Test. 



Viv. p. 90.— CMnu, Conch. III. pi. 25, f. 1, 2.— C. B. Ad. 



Pan. Shells, p. 97, no. 100. 

 (Columbella) Anachis pygmaia, H. Sf A. Ad. Gen. i. 184. 

 Comp. Columbella costulata, C. B. Ad. Contr. Conch no. 4, 



p. 58, (Jamaica.) [=A. pygmsea, var. Panama, Bridges.^ 



This shcU is like a minute A. costeUata, but there is scarcely 

 any spiral sculpture except in the young shell, and round the 

 base in the adult where it is very strong. The colour varies 

 from light horn with a few purple-brown patches, to a nearly 

 uniform black brown. The labrum has about 6 teeth ; the 

 labium wrinkled by the basal stria;. The first four whirls are 

 smooth and transparent, after which the normal sculptui'e 

 appears. The ribs are well marked, but the interstices ,are 

 not deeply chiseled. The smallest (nuclear) shell measures 

 '03 by "022; the largest, long. "25, long. spir. '13, lat. '11, 

 div. 40". 



Hah. — St. Elena ; on dead shells, in sandy mud, 10 fm. ; Cum- 

 ing. — Panama ; common under stones at low water mark ; 

 C. B. Adams.— M-SJiSiilan ; extfemely rare, on Spondylus ; 

 L'pool Col. 



Tablet 2129 contains 7 young sp. in different stages of 

 growth ; and 3 adidt, differing in colour. 



652. Anachis Gaskoini, n. s. 



A. t.parvd, solidiore, suhtumtd ; albidd, lineisfuscis angustis 

 spiralihus, anfr, ult v., penult, ii. ; inter posticas duos in costis 



