DR. BAIRD ON THE APHEODITACEA. 31 



Contributions to a Monograph of the Apliroditacea. 

 By William Baied, M.D., P.L.S. 



(Continued from vol. viii. p. 202.) 



[Eead Nov. 16, 1865.] 



Eamily lY. ACOETID^. 



(Acoetea, Kinberg, Ofversigt^ Kongl. Yetenshafs-Akademiens 

 ForJiandlingar, 1855, p. 386.) 



Body elongate ; no facial tubercle ; tentacle short, arising from 

 the middle of the anterior portion of cephalic lobe; bases of 

 antennae concealed under the peduncles of the eyes ; eyes 2, pe- 

 duncled ; pharynx exsertile, papillose on anterior margin ; jaws 

 large, horny, armed with two central and many lateral teeth; 

 palpi long, strong, and smooth. Elytra 39-93 pairs, placed upon 

 the 2nd, 4th, 5th, 7th, and all alternate odd segments onwards to 

 the extremity of the body ; segments not bearing elytra provided 

 with dorsal cirri. 



Grenus I, Acoetes. 

 Aeoetes, Audouin 8f Edwards, Hist. Nat. du Littoral de la France, 



ii. p. 92. 



Elytra flat, covering the whole back, and arranged imbricately 

 from behind forwards, or in the reverse way to that of the Aphro- 

 ditidcB and Folyno'idcs, the posterior portion of each elytron being 

 covered by the anterior of the one behind it ; peduncles of eyes 

 about the same length as the peduncle of tentacle. 



Sp. 1. Acoetes Pleei, Audouin Sf Edwards, I. c. p. 101, pi. 2a. figs. 

 7-14. 

 Polyodontes Pleei, Grube, Archiv fur Naturg. 1855, p. 90. 

 Hal. Martinique, "West Indies, M. Flee. 



Sp. 2. Acoetes ltipina, Stimpson, Froceed. Boston Sac. v. p. 116. 

 I£ah. South Carolina, Stimpson. 



G-enus II. Eupompe, Kinherg, I. c. p. 886. 

 Cephalic lobe tripartite on anterior margin ; peduncles of eyes a 

 little shorter than peduncle of tentacle, and occupying the anterior 

 portion of cephalic lobe ; elytra 93 pairs, flat, thin, and inversely 

 imbricated, or from behind forwards, leaving the anterior and 

 middle portion of the back naked, but covering the posterior part. 



Sp. 1. Eupompe Geubei, Kinberg, I. c. p. 387, and in Fregatten 

 Eugenies Mesa, p." 24, tab. 7. figs. 35a-35h, tab. 10. fig. 59. 

 Hah. Near Guayaquil, Kinberg. 



