1881.] THE SURVEY OF H.M.S. 'ALERT.' 49 



Obs. This species agrees with L. marsupium, Macgilliviay, as 

 described from Victoria in loc. cit., in every particular of the short 

 description ; but that description is so short as to need the present 

 fuller account. It resembles SchizoporeUa (Lepralia) venusta, 

 Norman, in many points, but wants the rectangular area above the 

 mouth, with its avicularium. 



SCHIZOPORELLA HYALINA, LinUe. 



Cellepora hyalina, Linne, Syst. Nat. (12) p. 128(j. 

 SchizoporeUa hyalina, Hincks, Hist, Brit. Mar. Polyz. p. 2/1, 

 pi. xviii. fig. 8-10. 



(i.) Ordinary form. Nine small colonies, from Elizabeth Island 

 (Straits of Magellan), 6 fathoms, on Fucus. One ditto from Port- 

 laud Bay (S.W. Chili), 10 fathoms, on Fucus. 



(ii.) Var. tuberculata, Hincks (Hist. Brit. Mar. Polyz. p. '212) 

 Pour small colonies on Fucus, and one of doubtful origin ; all from 

 Elizabeth Island, 6 fathoms. 



(iii.) Var. incrassata, Hincks {I. c. supra). Three colonies from 

 Elizabeth Island, 6 fathoms, on Fucus. 



SCHIZOPORELLA SPINIFERA, Johnstou ? 



Lepralia spinifera, Johnston, Brit. Zooph. (2) p. 324, pi. Ivii. 

 fig. 6. 



SchizoporeUa spinifera, Hincks, Hist. Brit. Mar. Polyz. p. 241, 

 pi. XXXV. figs. 6-8. 



To this species is referred with much doubt a patch of a small- 

 celled incrusting form, with very convex cells ; the articulations of 

 4 or 5 spines, now gone, are seen on the sometimes somewhat raised 

 peristome. Surface covered with indistinct puncta ; sinus large and 

 rounded, the margin at its upper angles drawn up into two vertical 

 points. A large median avicularium on a slight elevationjust below 

 the mouth, the mandible pointing downwards. No ovicells. 



Hal). Tom Bay, S.W. Chili, 0-30 fathoms, on dead Retepora. 



SCHIZOPORELLA? Sp. 



A glossy, obscurely punctured species without avicularia, with a 

 shallow small sinus, and a short pointed rostrum on the lower edge 

 of the mouth, and 7 to 8 slender spines on the raised peristome ; 

 zocecia convex ; no ooecia. Incrusting. 



Hab, Same as preceding. 



SCHIZOPORELLA LABIOSA, Busk. 



Lepralia labiosa. Busk, Cat. Polyz. Brit. Mus. p. 82, pi. Ixxxiv. 

 figs. 4, 5. 



This species should be described as having the surface of the cell 

 either tuberculated regularly around a median ridge, or indented by 

 large, mostly elongated grooves which radiate from a median ridge 

 or bare surface which extends about halfway down the cell from below 



Proc. Zool. Soc— 1881, No. IV. 4 



