REPORT ON THE SCHIZOPODA. 10{» 



with greatly expanded masticatory part, cutting edge but sliglith- dentate ; palp very 

 large. First pair of maxillte with anterior masticatory lobe strongly projecting and conrscly 

 spinous along the edge ; palp small but distinctly tri-articulate ; exognath drawn out 

 posteriorly as a narrow lappet. Second pair of maxilla? with a prodigiously developed 

 palp, consisting of three distinctly defined lamellar articulations. Maxillipods rather 

 strong, pediform. All of the legs distinctly developed, with the joints more or less lamellar, 

 expanded ; last pair rather short, but having both endopod and exopod well defined and 

 of a structure similar to that in the preceding pairs. Gills very fully developed, the 

 three posterior pairs exceedingly complex ; last pair by for the largest. Telson compara- 

 tively short. Uropoda with the plates remarkably broad, outer one distinctly jointed 

 near the apex. Luminous globules apparently wanting. 



Remarks. — This genus I have seen fit to estabhsh for the reception of the anomalous 

 form recorded by myself at an earlier date as Thysanopoda amhlyops, and first examined 

 from a defective specimen only. Having since found in the collection another somewhat 

 broken specimen, I had the means of making a more detailed anatomical investigation 

 and thus became convinced, that the form in question constitutes the type of a specially 

 distinct and very peculiar genus. More particularly the oral parts exhibit a most 

 remarkable structure, totally different from that in any other known genus of Euphau- 

 sidians. Moreover, the gills present certain well-marked peculiarities of structitre ; and 

 finally, the genus is the only one in which all the legs, even the last pair, are full}- 

 developed. The imperfect development of the eyes would seem to support the assumption 

 of the present form being a true deep-sea animal ; and hence I have deemed it advisable 

 to designate the genus accordingly. 



29. Bentheupliausia amhlyops, G. 0. Sars. (PI. XIX., Woodcut, Fig. 4). 



Thysanopoda (?) amhlyops, G. 0. Sars, Preliminary Notices on the Challenger Schizopoda, No. 27. 



Specific Characters. — Body almost cylindrical in form. Carapace without any lateral 

 denticles, anterior part very slightly keeled above, with frontal margin produced in the 

 middle into an acute angle. Caudal segments smooth above, with rather small, rounded 

 epimera. Last segment somewhat longer than preceding, preanal spine obsolete. Eyes 

 very small, with pedicle narrow, cylindrical, and slightly expanded at the cud above, cornea 

 exceedingly minute, with light pigment and imperfectlj^ developed visual elements. 

 Antennular peduncle short and thick, somewhat flattened at base, with an acute lobe 

 projecting from basal joint above. Antennal scale almost reaching extremity of 

 antennular peduncle, oblong-ovate in form, apex obliquely rounded, outer corner scarcely 

 at all projecting. Telson flattened, tapering, with two pairs of small dorsal denticles ; 

 apex pointed, subapical spines smooth. Uropoda scarcely, if at all, longer than telson, 



