L)I,. XVI. "I 



l,S!):i. J 



I'KOCKKDlNUtt OF THE NATlOiNAL MliyKUM. 



231 



t\w iiiiibuliitory legs, hirsute; tlio ambulatory lej^s more stroiij^ly so, 

 the loii^' linirs n'taiiiiiii;- lai'^'e particles of mud. 



Leiiglh oi" (•arai)ace, 11.;"); width, -S millimt^ters. 



Gulf of California; U. S. Fish Oommissiou steamer Albatross, 1SS9: 



Very much likr (jra/iosiiN S(im](soii, ]»iit at once distingiiishe<l by the 

 rostral spine. 



With the two males from station .'JOl 8, there is a small, immature 

 female, in an imperfect state, wiiich also belongs to tlu^ genus (Jollo<U:s; 

 the basal antenna! Joint is one-spined, and the <lorsaI suiface i.s devoid 

 of long' sjtines; otiierwise it resembles foniirostris. 



Eiiprognatha biflda. 



l^jiitire surface granulate, ('arai)ace subtriangiilar, ilatleiied behind, 

 conspicuously granulate, regions well delined. There is a spine on the 

 gastric, the cardiac, and each brancliial region; a minute s])ine on the 

 tiist abdominal segment, and two above the posterior margin; three 

 tnhercies in a. trans\ crse row on the anterior ])art of the gastric region. 

 Lateral margins sjiinnlons. I\ostriim bilid, the interantcMinnlar spine, 

 being absent. Snpiaorbital and postoil>ital s])ines distinct. tSjMiie of 

 basal antemial joint thin and de*']), advanced as far as the rostrum. 

 Abdomen of male al>rMi>lly narrowed at abont the midcMe; of female 

 with a central carina and (h'nsely set with large, tiatteiied gianules. 

 <'lieli|»eds of male ni(»<leiate, hand intlated, lingers gaping; of female 

 \ery weak, hand sh^idei', ting«'rs ](»nger than in male. Dactyli of ani- 

 bnlatoiy legs long, in lirsl- |»a-ir abont half the h'ngtii of tiic j>enult 

 joints and about I lie same length as the anteitenult. 



Length, *.); widtli, 7 millimeters. 



(lull" of ("alitbrnia; U. S. h^ish (Commission steanu-r Albatross, 1889: 



SMt)lamily AfANTHONNCIIINyK. 

 , Sphenocaicinus agassizi. 



('arai)ace tubeicuhite w itli an interrui)ted lidge along the median 

 line; on tlui gastric, region there are three tlattened tubercles, the 

 median one most jirominent, in advam-e of the others and ti[»ped ante- 



