92 Bulletin Vanderhilt Marine Museum, Vol. V 



ing between the second and third lobes; thus separating the frontal 

 lobe from those on the gastric region, defining the orbital border, and 

 separating the first and second anterolateral lobes as small lobules. 

 The gastric region is circumscribed and a slender lobe extends for- 

 ward in the median line to the rostral sulcus. On either side of this 

 median lobe there are two longitudinally placed lobes, which are 

 united and rounded posteriorly ; the inner lobe being the longer ante- 

 riorly. Outside of these, on the anterior branchial region, behind and 

 separated from the first and second anterolateral lobes, there is 

 a large, transversely placed, triangular lobe that is partially bifur- 

 cated ; immediately behind this is a long, transverse lobe that includes 

 the third lobe and extends across the branchial region, being delim- 

 ited anteriorly by a deep transverse sulcus that extends from between 

 the second and third anterolateral teeth inward to the cervical groove 

 at which point it unites with a similar transverse groove that extends 

 inward from between the third and fourth teeth. There is a small, 

 heart-shaped lobe, lying behind the inner end of this lobe and near to 

 the cervical sulcus. A short, transverse sulcus extends inward behind 

 the fourth anterolateral tooth. The cardiac region is circumscribed 

 and there is a shallower, transverse sulcus on the intestinal region. 

 There are about twenty-two lobules in all on the dorsal surface, all 

 are moderately convex, with surfaces paved with rounded red gran- 

 ules, arranged in a modified berry-like formation. Similar granules 

 pave the wide channels between the lobules. The pterygostomian 

 region is also granulose but except along the upper margin, the gran- 

 ules are smaller and flattish. The female belt is seven-segmented. 



The orbit is broad-oval, nearly subcircular, its tumid upper margin 

 rendering the eye inconspicuous in a dorsal view when the cornea is 

 retracted. 



The eyestalk is stocky, filling four-fifths of the exposed orbital 

 space and being covered externally by a violet, granulose, calcareous 

 coating, similar to the carapace. The cornea is small, black, hemi- 

 spherical, terminal, so that its greater visual capacity is on the distal 

 half. 



The antennulae are small, folded horizontally in the well-hooded 

 f ossett beneath the frontal margin. 



The antennae have the large, basal peduncular article triangulate, 

 with its distal apex lying within the orbital sinus, closing it but not 

 quite extending to the margin of the orbital angle; the second and 



