36 



BULLETIN 54, 'UNITED STATES NATIONAL MUSEUM. 



"But the characters which at once distinguished this species from 

 all others known to us are to be found in the microscopic armature of 

 the limbs. All the peraeopods are everywhere beset with long, very 

 slender spines, the whole of which, under high powers, are found to be 

 covered with minute prickles. There are no toothed spines, such as 

 are found in Alaotanais serratispinv&us, the corresponding limb to 

 which in A. hastiger hai the finger long, narrow, and curved, and sur- 

 rounded by a series of long, very slender spines, which all have the 

 character of being beset irregularly all around with little prickles. 



"The hinder peneopods have a finger which, so far as we are aware, 

 is absolutely unique in structure; the propodus is cleft at the end to 

 some depth, the cleft portions are rounded at the extremities and cre- 



\ 



FIG. 33. NEOTANAIS HASTIGEE (AFTER NORMAN AND STEBBING). a, OUTLINE OF CARAPACE FROM 

 ABOVE, b, ABDOMEN, c, THUMB AND FINGER OF FIRST GNATHOPOD. d, LATERAL VIEW, e, SECOND 

 PEE^OPOD. /, PORTION OF CARAPACE, SEEN FROM THE SIDE, g, LAST PER^OPOD (TERMINAL JOINTS). 



nated or serrulated; the finger articulates at the base of the cleft, and 

 is exactly spear-shaped, with serrated edges. A compaTison of the 

 fifth perseopod with the figures of the hinder peraeopods of Alaotanais 

 serratispi'nosus (the fourth peraeopod) will at once give characters suf- 

 ficient to distinguish these species. 



"The carapace, seen from above, is much narrower in front than 

 behind, and has a short rostrum; the sides are very flexuous, and pre- 

 sent two constrictions. 



"The telson is shield-shaped; the upper corners of the shield (that 

 is, the sides of the base of the telson) are very protuberant. Length, 

 5 millimeters." NORMAN and STEBBING. a 



"Trans. Zool. Soc., Lond., XII, 1886, Pt. 4, pp. 113-114. 



