I 



On Acara subocularis, Cope. 557 



Stac/ii/ptUum fuscum, sp. u. 



A club-shaped specimen, Avith autozooids arrannjed in ton 

 oblique rows on each side, each row consisting of 3-4 polyps, 

 with brown siphonozooids on the surface not occupied by 

 the autozooids. The spicules are rod-like with jagged ends 

 and 4- or 5-raycd forms, some vertebra-like. In several 

 respects the specimen approaches St. Macleari. 



Locality. Station 213, 137-131 tath. 



Family Penuatulidae. 



The collection also includes Pennatula Murrai/i, Kolliker, 

 and three other species, and one species of Pteroeides. 



LXXIV. — Description o/" Acara subocularis, Cope. 

 By C. 'i'ATE Regan, B.A. 



The species described below has generally been placad in the 

 genus Geophagus, no doubt on account of its resemblance to 

 Geophagus cupido, Heck. This will explain its omission 

 from my revi->ion of the genus Acara in the April number of 

 the * Annals.'' Mr. Rudolf von Ihering recently brought me 

 an example for identification, and when I determined it as 

 Geophagus Thayeri he pointed out that there was no lobe on 

 the upper part oF the anterior branchial arch. In none of the 

 three specimens in the British Museum Collection is there 

 any trace of a lobe on the upper part of the anterior branchial 

 arch. Consequently this species falls in the genus Acara, 

 and there can be no doubt that its position is next to Acara 

 Geayi, Pellegr., which it resembles in many respects. It is 

 worth notice that in most species of Acara the scales of the 

 thoracic region are nearly as large as those on the side of the 

 body, in A. rivulata they are smaller, in A. Geaji con- 

 siderably smaller, and in A. subocularis very small. 



Acara suhocularh. 



Geophaffits (Mesops) Thayeri {won Acara T/iaym, Steind.), Steind. Sitzb. 



Ak. Wieii, Ixxi. 1875, p. 108, pi. iii. fig-. 2. 

 Acara subocularis, Cope, Proc. Am. Phil. Soc. xvii, 1878, p. 696. 

 Oeopfiaf/us Thayeri, Pellegr. Mem. Soc. Zool. France, xvi. 1903, p. 189 



(I'JO-i). 



Depth of body 2,^-2^ in the length, length of head 3^-3.^. 



