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U.S. NATIONAL MUSEUM BULLETENT 271 



the astyrid lower lip or have an elongate telson. Most Calliopiidae 

 have triturative molars and the nontriturative molars of Pleustidae 

 are bulbous, not conical. 



In terms of accessory flagellum, mandibular molar, maxillae, 

 maxillipeds, gnathopods, uropods, and telson the Astyridae resemble 

 Paramphithoidae closely, especially to the genera Eclysis and Epi- 

 meriella, which have the same mandibular molar and gnathopods, 

 maxillae and maxillipeds. Astyridae differ from the Paramphithoidae 



Figure 66. — Astyridae: a, Astyra abyssi Boeck (Sars, 1895, pi. 73); b, upper lip; c, mandible; 

 e, lower lip; g,h, maxillae 1, 2; i, maxillipe'd; y,/^, gnathopods 1, 2; m, telson; o, uropod 3; 

 d, head of Astyra gardineri (Walker) (Pirlot, 1934, as Parastyra longidactyla); f, lower lip 

 of A. bogorovi Birstein and Vinogradov (1955); /, telson of A. zenkevitchi Birstein and 

 Vinogradov (1955); n, uropod 3 of A. gardineri. 



