100 RATHBUN 



By W. H. Ball at: 



Port Levashef, Unalaska, 20-30 fathoms. 



Iliuliuk Harbor, Unalaska, 10 fathoms. 



Captains Harbor, Unalaska, outside of ridge, 25-75 fathoms. 



Off Round Island, Coal Harbor, Unga, 8-9 fathoms. 



Anchorage, Big Koniuji Island, Shumagins, 6-20 fathoms. 



Popof Strait, near reef, 6 fathoms. 



Shahafka Cove, Kadiak, 12-14 fathoms. 



Chugachik Bay, Cook Inlet, 20-60 fathoms. 



Port Etches, 5-8 fathoms. 



Granite Cove, Port Althorp, Chichagof Island. 



Bering Island (L. Stejneger). 



Bering Island, among Laminaria (N. Grebnitzky). 



The males grow to be as large and robust as the females ; they have 

 the antennular peduncle and outer maxilliped much longer than in the 

 female ; in old males the peduncle is about four fifths as long as the an- 

 tennal scale, first segment extending half its length beyond the eyes, outer 

 basal scale only two thirds as long as first segment, second segment twice 

 as long as third. Antennal scale, measured on outer margin, two thirds 

 as long as carapace ; peduncle overreaching slightly the first segment of 

 the antennular peduncle. The penult segment of the outer maxilliped 

 slightly overreaches the antennal peduncle ; the terminal segment is very 

 long, as long as the carapace. 



Dimensions. A male measures 25 mm. long, carapace and rostrum 

 8.3 mm., rostrum 2.5 mm. 



SPIRONTOCARIS HERDMANI Walker. 



Spirontocaris herdmani WALKER, Trans. Liverpool Biol. Soc., XII, 277, pi. 

 xvi, fig. 2, 1898. 



Small. Carapace high. Rostrum two thirds length of carapace 

 proper, reaching nearly or quite to end of, or a little beyond, first antennu- 

 lar segment, straight, deflexed ; upper margin armed with 3 to 6 teeth, one 

 of which is on the carapace, anterior tooth remote from the tip, which 

 is pointed ; lower margin with one or two teeth near the tip. Antennal 

 and small pterygostomian spine present. Antennular peduncle reaching 

 a little past middle of antennal scale ; second and third joints very short, 

 the second a little the longer; basal scale reaching to end of first seg- 

 ment; thickened part of outer flagellum extending beyond acicle. 

 Acicle nearly as long as carapace ; antennal peduncle nearly as long as 

 antennular. Outer maxilliped extending beyond scale by half length of 

 last segment. First pair of feet exceeding scale a little. Fourth seg- 

 ment of abdomen provided with a small lateral spine ; sixth segment short, 

 very little longer than wide ; telson with three spinules on each side. 



