N(.. 1307 JAPANESE STALK-EYED CRUSTACEANS— RATHBUN. 45 



with '2 or 8 spinos, the posterior of Avhicli is just jintcrior to the distal 

 of the superior spines. A strong- autennal, a niinuti; pteryg-ostomiaii 

 spine. Eyes \cry small. Antenniilar pcdunele falling short of the 

 middle of th(^ ant(Muial scale; hasal scale of antennula reaching- about 

 to middle of second segment. Antennal scale three-fourths as long as 

 carapace; blade much exceeding spine. The maxillipeds reach just to 

 end of scale, are devoid of an cxopod, l)ut provided with an epipod, 

 as are the tirst three pcreiopods. The sixth segment of the abdomen is 

 a little more than half as long as the carapace. 

 The telson is shorter than the sul)equal uro- 

 pods, and is armed with -i pairs of lateral 

 spinules. 



Dn/iension,s. — Female, length 54.5 mm., fig. is.— spirontocaris grkb- 

 length of carapace and rostrum 18.5 mm., nit^kh, carapace of female, 

 of rostrum 8.7 mm. 



Tf/p'' locallfij. — One specimen was secured by Dr. Jordan and Mr. 

 Snyder at Mororan, Hokkaido, ))ut as it is imperfect, I have takei^. for 

 the type another from the same localit}^ collected a few j^ears ago 

 by N. Grebnitzki (Cat. No. 26159). 



SPIRONTOCARIS GENICULATA (Stimpson). 



Hippoliiti' (/niic)iliil(( iStimpsox, Pruc. Acad. Nat. 8ci. I'liila., XII, 1860, p. 84 

 [103].' 



Mororan, Hokkaido; Jordan and Snyder; 6 small. 

 Miura, Atami District, March, 1890; F. Sakamoto; 2 females with 

 ova. Called ''Kushakoshi ebi or grass-belt shrimp.'' 



Rostrum longer than the carapace (measured on median line from 

 posterior nuirgin to line of orbits), not cpute reaching tip of antennal 

 scale, straight, horizontal, acuminate, armed with 1 or 5 teeth above, 



1 or 2 of which are ])ehind the orbit, and 

 5 to 8 teeth below, 1 or 2 of which may 

 be subterminal. A strong antennal, no 

 supraorbital nor pterygostomian spine. 

 Fig. 19.— SPIRONTOCARIS GENICULATA, Thc antennular peduncle reaches abou 



CARAPACE OF FEMALE, X 13. 4.I, • 1 j-1, 1 j-1 i! i-U '1 "i. I 1 



one-third the length or the acicle; its basal 

 scale extends a little lieyond tirst segment. The antennal peduncle 

 reaches to end of second segment of antennular peduncle; the acicle is 

 a little longer than the carapace, extremity very oblique, Ijlade exceed- 

 ing l)y far the spine. The outer maxillipeds and the fifth pair of 

 pereiopods reach just to the end of the antennular peduiude; the second 

 pair of pereiopods to the middle of the acicle. The maxillipeds have 

 an epipod but no exopod; the pereiopods are destitute of epipods. 



The abdomen is bent at a right angle at the third segment; in pro- 

 tile the angle is rounded; the posterior part of tlu> third segment is 

 strongly compressed. This compression and angulation is very well 

 marked in the adult females from Miura, much less so in the specimens, 



