202 



lu the collection of Mr. Warpa chow sky 2 distinct, thongh uearly 

 allied species are represented, one of Avhich was named by Dr. Grimm, 

 whereas the other is new to science. Besides Dr. Grimm has distinguished 

 2 other species as A. intermedia and A. macropMhalma; but 1 am at pre- 

 sent unable to see any essential differences between the specimens so named 

 and normal specimens of A. cristata. On the other hand, a very beautiful 

 form, which has been collected by Dr. Grimm in great profusion from 

 rather considerable depths in the middle and southern part of the Gasjjian 

 Sea, and which was labelled A. cristata, var. spinata, would more likely 

 seem to represent a distinct species. 



4. Amathillina cristata, Grimm. 



(PI. V, PL VI, figs. 1-8). 



Specific Characteristic. — Body rather stout and not very much com- 

 pressed, with the back distinctly keeled throughout, the keel being, how- 

 ever, in its auteiior ])nit latlier low, and scarcely elevated to any distinct 

 projections in front of the 4th segment of mesosome, the succeeding pro- 

 jections successively increasing somewhat in size and being i-ather broad, 

 triangular, that of last segment of metasome, however, diti'ering from the 

 others in being evenly rounded, not angulary produced. Cephalon with the 

 rostral projection short and blunt, lateral lobes obtusely ti'uncated. Anterior 

 paiis of coxal plates somewhat deeper than the corresponding segments, 1st 

 l)air but slightly expanded distally, though considerably, broader than the 

 2nd; 4th pair with the ])osterior expansion transversely truncated and form- 

 ing below the emargiuatiou a nearly right angle. The last 2 pairs of epi- 

 meral plates of metasome but very slightly i)roduced at the lateral corners. 

 Eyes not very large, narrow reniform, with dark pigment. Superior antennae 

 nearly equalling half the length of the body, joints of the peduncle successively 

 diminishing in size, flagellum halfas long again as the peduncle, accessory ap- 

 pendage about the length of the last peduncular joint and 5-articulate. Inferior 

 antenu;e in female scarcely more than halfas long as the superior. Guathopoda 

 in feuuile comparatively small and about same leugth, propodos in the posterior 

 ones considerably narrower than in the anterior, palm in both pairs some- 

 what obli(|ue; those in male much stronger, with the propodos very large 

 and somewhat claviform in shape, palm concave and defined below by an 

 angular pi'ojecting lobe armed with 2 strong spines. Basal joint of ante- 

 ])enultimate and penultimate pairs of j)ereiopoda of nearly same form, though 

 somewhat differing in size, postei'ior edge in both pairs but slightly curved ; 

 tliat of last pail' considerably broader in female than in male, posterior ex- 

 pansion forming below a iduiided lobe reaching beyond the ischial joint. 



*u3.-llaT. cTp. 202. 2i 



