:m TAOR SICnOSBRnC. 



of the incisiir there is a moderate number of scattered and moderately long bristles. Besides 

 these bristles there are only a rather few moderately long bristles in the incisur, most of which 

 are scattered, some perhaps with a faint indication of being arranged in a row running somewhat 

 inside and about parallel to the ventral margin of the rostrum. On the part just behind the 

 incisur there are also only sparse medial bristles, of which those situated nearest the margin 

 of the sliell are moderately long and are arranged in a sparse row running about parallel to and 

 somewhat inside the margin of the shell; those situated farther in are short and scattered. 

 Along the middle of the ventral margin of the shell there is a not inconsiderable number of rather 

 short bristles, arranged in a rather distinct row running about parallel to and somewhat inside 

 the margin of the shell. Along the posterior part of the ventral margin there are only single 

 short bristles. At ab(jut half way between and running parallel to the ventral quarter or third 

 of the spine-bearing list and the margin of tlie shell there is a sparse row of moderately long 

 bristles. The spine-bearing list has 21 — 22 hyaline spines; in addition there are a moderate 

 number of short bristles, in most cases two or three between the dorsal spines, one or two between 

 the ventral ones. Between the spine-bearing list and the posterior margin of the shell there 

 is a ridge similar to that in A. vorregica and close to this ridge there are also broad and fine 

 pores such as are to be found in this species. 



First antenna (fig. 3): — This is very like that of A. (himaldi. It is to be noted: 

 The original third and fourth joints form together a joint that is somewhat, though only slightly, 

 shorter than it is high and also somewhat shorter than the total length of the original fifth and 

 sixth joints. The anterior bristle of the second joint is about as long as or rather slightly longer 

 than the anterior side of this joint. In the specimen investigated the original third joint had 

 on the anterior side five bristles on the right, four bristles on the left antenna (one or two bristles 

 respectively broken off?). Of these bristles nos. 2 and 4 were unusually short, only about half 

 as long as no. 1. The stem of the sensory bristle of the fifth joint relatively short, only about 

 as long as the total length of the two penultimate joints; with seven sensorial filaments. The 

 number of sensorial filaments on the c-. f- and g-bristles could not be decided on account of 

 the defective condition of these bristles. Pilosity: The first and second joints have abundant 

 groups of short, fine, stiff hairs (only indicated in the accompanying figure), but there are no 

 hairs along the distal boundary of the second joint. There is a series of short hairs anteriorly 

 on the distal boundary of the (original) fifth joint. 



Second antenna: — Distally-medially close to the exopodite there is a short 

 bristle on the p r o t o p o d i t e. The e x o p o d i t e has no basal spines at all. The e n d o- 

 podite is weakly three-jointed; its end bristle is almost twice as long as the stem 

 (about 14 : 7,5). 



M a n d i b 1 e (fig. 4): — Pro t o p o d i t e: Coxale: The scythe-shaped process (fig. 5): 

 The part distally of the main spine narrows evenly and gently into a fine point; its ventral edge 

 is uniformly and weakly convex, almost straight. The distance from the point of the process 

 to the main spine is somewhat greater than the distance from the latter to the proximal ventral 

 spine. The dorsal bristle is attached somewhat nearer the point of the process than its distance 

 fioni the main spine and considerably more distally than the latter; it extends a not inconsiderable 



