ITAZATLAN BETOZOA 6 



Genus LEPKALIA, Johnston. 

 Lepralia, B. M. Cat. p. 63. 



3. Lepealia ATBOFtrscA, Rylands, ms. (n. s.) 



Cellulis clongatis, ovatis sen rhomboideis, lined tenui elevatd 

 dnctis, superficie puuctato ; ore suhorhiculari, inferne sinuate, 

 utrinque denticulato. 



General liue, blackish ; aud even when tlie cells are more 

 calcareous and on tliat account whiter, the dai'k interstitial 

 line remains ver\^ evident. It is quite distinct from L. cncidlata, 

 {B. M. Cat. p. 81, pi. 96, fig. 4, 5,) also of a black colour, and 

 which occurs in the Mediterranean. 

 Hab. — Mazatlan ; on Imperator olivaceus and iinguis, and on 



Anomia ; Upool Col. 



Tablet 4 contains 2 groups detached. 



4. Lepealia teispinosa, Jolinst. 



B. M. Cat p. 70, pi. 85 ; fig. 1, 2 ; pi. 98 ; pi. 102. fig. 2.— 



JoJins. Br. Zoox>h. i. 324, ed. 2 ; pi. 57, f. 1.— Couch Corn. 



Faun. iii. 118. — J. Macgillivray in Ann. Sf Mag. N. Hist. ix. 



467. 

 Discopoi'a trispinosa, Johns, in Ed. Phil. Journ. xiii. 822. 

 Berenicea trispinosa, Johns, in Trans. Newc. Soc. ii. 268. 



A single minute specimen only has occurred to my notice, 

 but this is quite indistingiiishable from the British form. 

 Hab. — On shells from deep water, rare, Berwick Bay, Johnston. 



Coast of Cornwall, Peach. — On root of Lamrnaria digitata, 



near Aberdeen, Macgillivray. — Mazatlan ; on Imperator ; 



Ij'pool Col. 



Tablet 5 contains the group. ' 



5. Lepealia Mazatlanica, Bush. (n. s.) 



Cellulis immersis, depressis, seu ventncoso-globos-is ; superficie 

 punctata; ore suhorbiculariinf erne late sinuato ; margine incras- 

 sato, elevato ; aviciilario unico fvel rare, duobus) lateraliprope os. 



This form might easily be confoimded with some varieties of 

 L. unicornis, or L. Ballii. It is distinguished, however, by its 

 reddish colour, and the elevation of the mouth together witli 

 its thickened margin. ' The single or sometimes double avicu- 

 larium points outwards and upwards, and the mandible is pro- 

 longed and acute. It is sometimes, but not frequently absent. 

 Hab. — Mazatlan ; on Imp. olivaceus and unguis ; L'pool Col. 



Tablet 6 contains a group on Imperator. — 7, one detached. 



