446 MARINE BIOLOGY OF THE SUDANESE RED SEA. 
Genus Actaa, de Haan, 1833. 
36. Actma romenTosa (H. Milne-Edwards, 1834), See Alcock, 1898, p. 140. 
Actea tomentosa, Nobili, 1906, p. 252. 
Acteodes tomentosus, Stimpson, 1907, p, 44. 
Locality. Station VII. C, 1  non-ovig., but apparently adult [91]. 
Remarks. C.1. 16 mm., C.b. 24°75 mm., C.1.+—C.b.="65. 
37. ACTHA HIRSUTISSIMA (Riippell, 1830). See Alcock, 1898, p. 141. 
Actea hirsutissima, Nobili, 1906, p. 252. 
Localities. Station V. A, 8 small [92-99] ; Station V. B, 1 g [100], 1 2 
small [101]; Station V. C, 1 2 small [102]; Station V. EH, 2 ¢ [103-104]; 
no locality given, 1 ¢ [105]. 
Remarks. The largest $ has C.]. 15 mm. and C.b. 23°5 mm., so that 
C.1.+C.b.='64; C.1. of smallest specimen 3 mm. 
38. AcT#A GARRETTI, Rathbun, 1906. See Rathbun, 1906, p. 852, pl. 9. 
fig. 8. 
Actea garretti, Rathbun, 1911, p. 218. 
Actea rufopunctata, var. retusa, Nobili, 1906, p. 253. 
Locality. Station IX. A, 1 g [106], 1 2 [107]. 
Remarks. 6 106, Cl. § mm., C-b. 11°35 mm., Cl.=—C.b.= 69; 2 1075 
C.l. 7 mm., C.b. 10°75 mm., C.l.—C.b.="66. 
39. AcTHA POLYACANTHA (Heller, 1861). See Heller, 1861, p. 339, pl. 3. 
fig, 21. 
Chlorodius polyacunthus, Heller, loc. cit. 
Actea polyacantha, Nobili, 1906, p. 209. 
Actea polyacantha, Rathbun, 1911, p. 222. 
Localities. Station V. A, 1 @ [108]; Station VII. D, 1 2 non-ovig., but 
apparently adult [109]. 
Remarks, 2 1092 CAS @mm., (C.b.) 10) am Cal Ohh 7 ora oe 
©1375 mm Oso. Ds2 oem Gla bso. 
This species is evidently allied very closely indeed to the Australian species 
peronit of H. Milne-Edwards (Alcock, 1898, p. 150) and its Indian variety 
squamosa of Henderson (Henderson, 1898, p. 357, and Laurie, 1906, p. 404). 
Alcock suggests with a query that the two species may be synonymous. 
T have not sufficient new material before me to warrant in my opinion their 
union as yet. Rathbun keeps them apart and calls attention to the inter- 
mediate position occupied by A. polyacantha between peronn, H. M.-Edw., and 
spinosissima, Borradaile. 
