10 STALK-EYED CRUSTACEA. 



The name Anamaihia has been substituted by Professor S. I. Smith for 

 Amalftia Roux, as the latter name had been previously used in another sense 

 by Lamouroux. The type species of the genus is Aina/hia rissoana Roux 

 from the Mediterranean Sea. Nine other species have been referred to the 

 genus, viz. : A. h>/strix Stimps., A. modesta Stimps., Scyra mnboncda Stimps., 

 A. crassa A. M. Edw. (^ A. agassizii Smith), A. tanncri Smith, — all from the 

 east coast of North America and the Caribbean Sea,- — A. carpenten Norman 

 from the coast of Europe, A. jyiilchra Miers from the Philippine Islands, 

 A. Uvermorii W.-M. from the Bay of Bengal, and A. occidcntalis Fax. from 

 near the Galapagos Archipelago. Most of them have been taken in rather 

 deep water (88 to 561 fathoms). When all these species are compared with 

 each other, considerable differences are observable as regards the structure 

 of the orbital region, the armature of the basal antennal segment and the 

 carapace, etc. In the t3-pical species, A. rissoana, the upper surface of the 

 carapace is rather Hat, and armed with long, sharp spines ; the basal anten- 

 nal segment is unarmed ; the upper margin of the oi-bit projects but slightly 

 over tlie eye, and there is no priEocular spine. In A. hi/sirix the carapace 

 is more convex both in the longitudinal and transverse axes, and is armed 

 with very long sharp spines; the basal antennal segment is produced into 

 a blunt spine or tooth at its antero-external angle ; the supraorbital margin 

 or brow overhangs the orbit no more than it does in A. rissoana, but there is 

 a long and sharp prosocular spine. In A. crassa the carapace is strongly 

 arched, and the spines with which it is furnished are short ; the basal seg- 

 ment of the anteinia is armed with two spines, one at the distal, the other 

 near the proximal end ; there is a prasocular spine, and the upper border 

 of the orbit beetles further over the eye than it does in A. rissoana and 

 A. hjstrix, but still falls short of forming that perfect roof bounded behind 

 by an almost transverse fissure, such as is seen in the typical species of 

 Hyastenus and Naxia. In A. innhonata, A. carpmtcri, and A. occidcntalis, the 

 conformation of the orbits and the convexity of the carapace are much the 

 same as in A. crassa, but the basal joint of the antenna is unarmed, and in 

 the two former (unibonafa and carpcnteri) some of the spines of the carapace 

 are transformed into flattened tubercles. For these two species A. Milne 

 Edwards* has proposed to establish a new genus SrjjranKdhia. G. 0. Sarsf 

 adopts the genu.? Scijramathia, and adds to it Amathia crassa. He places the 

 genus in the Maiine group, in close proximity to Hi/astcmts. 



• ComptcR Rcndus dc I'Acad Sci., Paris, XCI. 356, 1880. 

 t Norske Nordliavs-Exped., Crustacea, 1. 1, 274, 1885. 



