MAZATLAN BEYOZOA 



GENUS LEPKALIA, Johnston. 

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



4 3. LEPEALIA ATEOFUSCA, Rylands, ms. (n. s.) 



Cellulis elongatis, ovatis seu rhomboideis, lined tenui elevatd 

 cinctis, superfine punctalo ; ore sub orbicular i, inferne sinuato, 

 utrinque denticulato. 



G-eiieral hue, blackish ; aud even when the cells are more 

 calcareous and on that account whiter, the dark interstitial 

 line remains very evident. It is quite distinct from L. cucullata, 

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

 which occurs in the Mediterranean. 

 Hob. Mazatlan ; on Imperator olivaceus and unguis, and on 



Anomia ; L'pool Col. 



Tablet 4 contains 2 groups detached. 



4. LEPEALIA TEISPINOSA, Johnst. 



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



Johns. Br. Zooph. i. 324, ed. 2 ; pi. 57, f. 7 '.Couch Corn. 



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



467. 



Discopora trispinosa, Johns, in JEd. Phil. Journ. xiii. 322. 

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



A single minute specimen only has occurred to my notice, 

 but this is quite indistinguishable from the British form. 

 Hob. On shells from deep water, rare, Berwick Bay, Johnston. 



Coast of Cornwall, Peach. On root of Laminaria digitata, 



near Aberdeen, Macgillivray. Mazatlan ; on Imperator ; 



L'pool Col. 



Tablet 5 contains the group. 



5. LEPEALIA MAZATLANICA, Busk. (n. s.) 



Cellulis immersis, depressis, seu ventricoso-globosis ; superficie 

 punctato ; ore suborbiculari inferne late sinuato ; margine incras- 

 sato, elevato ; aviculario unico (vel rare, duobus) later ali pr ope os. 



This form might easily be confounded with some varieties of 

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

 reddish colour, and the elevation of the mouth together with 

 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. 

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



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



