tidc Dectipo'l (rtisUni (t. '101 



greatest brc.-ultl), nt tlic angles between the aiilero- aiul 

 ])Ostero-l:iteial borders, 10 mm. The breadth (I*.S mm.) of 

 the Fniiit at its base ahiiost one filth of the greatest breadth 

 of tlie carapace, hiteral margins of the front smooth and 

 entire. On the posterior end of the gastric region stands 

 a low ronnded tnbercle iti the middle line, in front of which a 

 mneh smaller one is observed on either side. Cardiac region 

 in the middle line with two obtuse tubercles bidiiud one 

 another, which are as large as that of tiie gastric region. 

 Distance between the external orbital angles one third the 

 greatest breadth of the carapace. Hepatic area?, situated 

 between the orbits and the branchial regions, deeply concave. 

 Branchial regions considerably sw(dlen and inflated, nearly 

 globular, twice as broad as the gastric region. The cristi- 

 form antero-lati'ral margins run at first outward and then 

 curve backward and upward, terminating, on tiie outer surface 

 of the branchial globes, in a triangular compressed tooth, 

 which is preceded by three or four smaller; postero-lateral 

 margins also cristiform, running at first backward and 

 npward, then tinning suddenly downward and inward at a 

 light angle, and carrying at this angle an obtus'3 tootli, which 

 is smaller than that at the posterior end of the antero-lateral 

 border. Kight chelipede a little larger than the left, little 

 more than twice as long as the carapace. Anterior border o£ 

 the trigonal jialm crenulate, the upper denticulate, the teeth 

 small, little jirominent; posterior margin sharp, cristifortn, 

 witii four triangular teeth, on the left leg with six or seven. 

 h)harj)ly pftinted fingers much turned inwards. 



Ambulatory legs of moderate length, their joints laterally 

 compressed. 



A single male from Japan, probably from the Inland 

 Sea. 



Crangon consohrinus, sp. n. 



Closely related to Crangon alaskensis, Lock.*, from 

 Alaska, but i)erhaps different. 



Carapace (rostrum included) one fourth of the whole length, 

 liostrum distinctly shorter than the eye-peduncles when they 

 are directed forward ; it is rather narrow, sides parallel for a 

 portion of their length, edges Uj)turned, tip rounded. Single 

 median gastric .«pine at one fourth of the length of the 

 carapace from the tip of the rostrum, situated with the two 

 ernially large hepatic spines in a transverse line. 



* Ilathbun, * Decapod Crustacoans of the North-west Coast of Xurlh 

 America' (New York, 1904), p. 114. 



Ann. tfe Mag. N. Hist. Ser. 7. Vul . xvii. 2S 



