90 AMPriiroDA koumalia. 



terior margin, and consequently has greater motive power. This iti 

 undoubtedly the case with the leg drawn as the second gnathopod 

 in the plute of Dana's fine work. In all other respects the animal 

 more resembles the genus Alylus of Leach, than that of Ojiis of 

 Kroyer. Not having seen the animal, it is but right to assume that 

 the description is correct, though the figure is erroneous. 



Subfamily 3. AMPELISCADES. 



Ampeliscades, Spenco Bate, Ann. Nat. Hist. vol. xx. p. 525, 1857. 

 Tetromatides, Spence Bate, Brit. Assoc. Rtport, 1855 ; Synopsis, Ann. 

 Nat. Hist. Feb. 1857. 



Cephalon produced anteriorly, cone-shaped, the superior antennae 

 being placed at the apex. No compound eyes, but four small 

 simple organs of vision. Gnathopoda more or less subchelate, 

 not powerful. Coxae deep, as also those of the first two pairs of 

 pereiopoda. 



The only genus that we yet recognize as fulfilling the conditions 

 of this subfamily is so peculiar that it cannot be grouped in either 

 of the other subfamilies. The general form of the body approaches 

 it near to Anonyx ; but the projecting cephalon and the posterior 

 position of the inferior antennae approximate it to the subfamily 

 of the Phoxides, from which, again, it is distinguished by the form 

 and unique character of the organs of vision. I therefore think it 

 better to place it in a subfamily by itself, between Lysianassides 

 and PnoxiDES. 



16. AMPELISCA. 



Ampelisca, Kroyer, Nat. Tidskr. 1 ser. iv. p. 154. 



Spence Bate, Ann. Nat. Hist. eer. 2. vol. xx. p. 255. 



Liljeborg, Offers. afKongl. Vetensk. Akacl. p. 22, 1851, p. 137, 1855, 

 Araneops, Costa, Rend, del. Accad. del Sc. di Nap. p. 169, 1853. 

 Pseudoplithalmus, Stimpson, 3Iarine Invert. Grand 3Ianan. 

 Tetromatus, Spence Bate, Brit. Assoc. Report, 1855 ; Synopsis, Ann. 

 Nat. Hist. Feb. 1857. 



Cephalon tapering anteriorly. Eyes four, minute, simple, situated 

 near the anterior extremity of the eephalon. Superior antennae 

 simple, attached to the extremity of the cephalon. Inferior 

 antennae arising very far posterior to the base of the superior. 

 Mandibles furnished with an appendage. Gnathopoda imperfectly 

 subchelate. The first and second pairs of pereiopoda tciminating 

 in a styliform dactylos longer than the propodos ; third and fourth 

 pairs terminating in a short curved dactylos directed posteriorly. 

 Three posterior pairs of pleopoda biramose. Telson squamiform, 

 cleft. 



I anticipate, from the form of the head, that the ariimals of this 

 genus are burrowcrs in soft mud, sand, &c. 



