ALPHEUS PANAMENSIS. 15 
OU 
Station 3418. 660 fathoms. 13 specimens. 
ig Sc a OW a 3) > 
eet A0, O80. 9 : 
PANDALOPSIS Barr. 
Rep. Challenger Macrura, p. 671, 1888. 
Pandalopsis ampla Barr. 
Rep. Challenger Macrura, p. 671, Plate CXV. Fig. 3, 1888. 
Station 5418. 660 fathoms. 1 specimen. 
Eotae. 0165 wc 6 specimens. 
The types of this species were collected in 600 fathoms, off Monte Video. 
Pandalopsis is a MS. name of A. Milne Edwards’s, adopted by Bate. This 
genus is distinguished from Pandalus by the greatly elongated flagella of 
the antennules, and by the laminate expansions of the merus of the third 
maxillipeds and of the ischium of the first pair of legs. The third maxilli- 
ped has no exopod. The epipods of the legs are rudimentary, as in Pandalus 
and [Teterocarpus. The branchial formula is the same as for Pandalus and 
Heterocarpus, Viz. : — 
Somites Vile eave) 1X, Xe Gy ON GUN Rane 
Pleurobranchize 0 0 0 1 il 1 1 1= § 
Arthrobranchiz 0 0 2 1 1 1 1 0= 6 
Podobranchiz 0 1 0 0 0 0 0 0o= i 
Epipods 1 1 1 1 1 1 1 OF (7) 
12+ (7) 
The generic distinctions between this genus and Pandalus drawn from 
the branchix and epipods, mentioned by Bate,* do not exist. 
The right and left legs of the second pair are of about equal length in 
P. ampla. 
Famity ALPHEID. 
ALPHEUS Farr. 
Suppl. Ent. Syst., pp. 380, 404, 1798. 
Alpheus panamensis Krvest.? 
Bull. U. S. Geolog. and Geograph. Surv., Vol. IV., No. 1, p. 192, 1878. 
Five specimens (two of them ovigerous females), without a label, agree 
pretty well with Kingsley’s description of A. panamensis, There is a small 
* Op. cit., p. 671. 
