1500 THE VOYAGE OF H.M.S. CHALLENGER. 



minutely pectinate, the inner ramus broad, with fine marginal pectination, the tips 

 reaching back beyond all the other rami and a little beyond the apex of the telson. 



Telson broader than long, triangular, with rounded apex, not quite so broad at the 

 base as the segment with which it is coalesced ; the triangle formed by the sides of the 

 telson and those of the two preceding coalesced segments is of about equal breadth and 

 length. 



Length, three-twentieths of an inch from the front of the head to the back of the 

 second pleon-segment, so that the total length may be regarded as one-fifth of an 

 inch. 



Locality. — January 1875, Zebu Harbour, Philippines, surface. Three specimens, one 

 male, one female, the third not specially examined. 



Remarhs. — The specific name refers to the place of capture. This species closely 

 approaches Parascelus edwardsii, Claus, taken in the Atlantic Ocean, and is distinguished 

 from it chiefly by the fifth perseopods, the first joint of which is much more bent than in 

 the Atlantic species, while the following joints bear a very much smaller proportion to 

 the first joint, and the relative sizes of the fourth and fifth joints are different. The pro- 

 portions differ also to some extent in the uropods, in the present species the inner ramus 

 of the second pair being the longest of all the rami, but in the Atlantic species shorter 

 than the inner ramus of the first pair. 



Parascelus parvus, Claus. 



1879. Parascelus parvus, Claus, Die Gattnngen und Arten der Platysceliden, p. 20. 



1887. ,, ,, Bovallius, Systematical List of Aniph. Hyper., Bihang till K. Svensk. 



Vetensk.-Akad. Handl., Bd. 11, No. 16, p. 44. 

 1887. „ „ Claus, Die Platysceliden, p. 47, Taf. viii. figs. 12-17. 



For the general appearance of this little species, I may refer to the figure of 

 Parascelus parvus given by Claus in Die Platysceliden, Taf. viii. All the segments of 

 the perseon are distinct, the back is broadly rounded, the postero-lateral angles of the 

 first three pleon-segments are not acute. The liver-tubes are very large, the heart very 

 narrow. 



Eyes as in the preceding species. 



Upper Antennae — First joint much the longest, curved, with a bristle or very 

 slender spine at the outer apex, the second joint not twice as long as broad, the third 

 not longer than broad, armed with two bristles, the first joint of the flagellum as long 

 as the second of the peduncle, but more slender, the second joint longer than the first, 

 having like it two apical bristles, the third joint linear, slightly longer than the second, 

 having on the tip two or three bristles about as long as the joint. 



Lower Antennse. — The third (first free) joint of the peduncle slightly curved, much 



