70 MARINE POLYZOA. 



Escharina unicornis, Gray, 1. c. p. 124. 



Hab. Isle of Wight, G. B. Coast of Devon, Miss Cutler. Bay 



of Gibraltar, Landsborough, M' Andrew. ? Port Natal, W. 



Stanger. On fuci and shells. 



From the comparison of numerous specimens in all forms and 

 stages, I feel satisfied of the identity of L. spinifera (Hassall) and 

 L. unicornis (Johnston). The peculiar sculpture of the ovicell, 

 conjoined with the sinus in the lower lip and the lateral avicularia, 

 are sufficiently characteristic, without the often-wanting central 

 umbo and articulated spine. 



11. LEPRALIA TRISPINOSA. PI. LXXXV. figs. 1, 2. PI. 

 XCVIII. PI. CII. fig. 2. 



Cells ovate, usually punctured round the edge ; mouth raised, 

 with a thin border, lower lip forming a sinuous spout, two or three 

 spines above ; occasionally an avicularium on the side of the cell ; 

 mandible acute, pointing upwards and outwards. 



Discopora trispinosa, Johnst. Edinb. Phil. Journ. xiii. 322. 

 Berenicea trispinosa, Johnst. Trans. Newc. Soc. ii. 268. 

 Lepralia trispinosa, Johnst. Brit. Zooph. p. 280. pi. 34. fig. 5 ; 



Couch t Corn. Faun. iii. 118; J. Macgillivray, Ann. 8f Mag. 



Nat. Hist. ix. 467 ; Johnst. Hist. B. Z. ed. 2. p. 324. t. 57. 



fig. 7 ; Gray, List Brit. Rad. p. 122. 

 Lepralia variolosa, var. a, Johnst. Brit. Zooph. ii. 317. pi. 55. 



fig. 8. 



Var. a. With a rostrum below the mouth. 

 Hab. Coast of England, Scotland and Ireland, common. Cape 



Horn, 40 fathoms, Darwin. 



Notwithstanding the great diversity in aspect of different spe- 

 cimens, the characters above given will in most cases be recog- 

 nized in one part or another of the polyzoary, and will suffice to 

 distinguish the species from those with which it has apparently 

 been confounded, viz. L. variolosa, concinna, and L. Peachli 

 (L. immersa, Johnst.). 



12. LEPRALIA COCCINEA. PI. LXXXVIII. 



Cells oval or shortly cylindrical ; mouth with a central mucro 

 on the lower lip and two lateral teeth ; several (six) spines above ; 

 an avicularium on each side close to the mouth. Ovicell glo- 

 bular, surface granular. 



Cellepora coccinea, Abildgaard, Mull. Zool. Dan. iv. 30. t. 146. 

 figs. 1, 2; Lamk. Anim. s. Vert. ed. 2. ii. 259. 



