KEPORT ON THE SCHIZOPODA. 197 



inner edge is coarsely spinous tliroughout, the spines being somewliat unequal in size, and 

 more especially the two apical ones rather large. The outer plate exhibits a form very 

 similar to that of the inner, but is somewhat shorter, and has the outer edge fringed with 

 a row of rather small, equal-sized denticles, the posterior of which, however, issuing from 

 the tip of the plate, is somewhat stronger than the rest and slightly incurved. 



As regards colour, the specimens preserved in spirit exhibit a light brownish hue, 

 and have, moreover, a rather conspicuous dendritic pigmentary deposit on either side of 

 the carapace behind the cervical sulcus. 



Habitat. — Several specimens of this form, both males and females, were taken at the 

 surface of the sea off Cape of Good Hope. The locality is given as follows : — 



Station 141, December 17, 1873 ; lat. 34° 41' S., long. 18° 36' E. 



The specimens examined by Kroyer were collected in the tropical part of the Atlantic, 

 in Lit. 14° N.; those examined by Professor Dohrn were derived from the Museum at 

 Kiel, and stated to have been procured during the cruise of the Danish frigate "Galathea" 

 — the locality was not recorded. 



50. Anchialus angustns, G. 0. Sars (PI. XXXV. figs. 1-18). 



Anchialus cmgustu^, G. 0. Sars, Prelimiuary Notices on the Challenger Schizopoda, No. 48. 



Specific Characters. — Form of body slender and elongate. Carapace narrow, evenly 

 emarginate posteriorly and not covering the trunk completely. Frontal margin jutting 

 out in the middle as an acute triangular projection, and forming on either side between 

 eye and base of antennse a similar triangular lobe ; antero-lateral corners rather broad 

 and projecting, acuminate at tip. Tail slightly tapering, anterior segment in female 

 with distinctly projecting epimera, last segment rather elongate. Eyes narrow, weU-nigh 

 cylindrical, cornea scarcely expanded. Antennular peduncle more slender than in preced- 

 ing species. i\.ntenual scale of a similar appearance to the one in that species, but having 

 the denticle of the outer corner distinctly developed. Gnathopoda less robust. Legs 

 having terminal part very slender and subdivided into seven articulations. The two poste- 

 rior pairs of caudal limbs in female imperfectly developed ; outer branch of fourth pair in 

 male greatly produced, styliform. Telson very similar to that in Anchialus typicxis, 

 but somewhat narrower. Inner plate of uropoda having auditory apparatus well 

 developed, outer plate about the same length, with only two spines, placed close together 

 in the middle of outer edge, terminal section linouiform. Maroinal setae on both 

 plates well developed. Length, 10 mm. 



Remarks. — This is a very distinct species, and at once distinguished from the pre- 

 ceding by its slender form and comparatively small and narrow carapace. It also exhibits 

 several differences in its anatomical details, though evidently belonging to the same genus. 



Description. — Of this form three specimens were found in the collection, two adult 



