mo. 1651. i:i:i'ort o.v the OSTRACODA—SMARPE. 425 



seta at its inner distal angle; penultimate segment with a long ringed 

 seta at its outer distal angle; terminal segment conical, about length 

 of previous segment, and terminating in a short seta. 



Mandibular process falcate (Plate LXIII, fig. 5), pointed and with 

 many hooked serrations, and a slender outer branch. Vermiform limb 

 broadened at end, the last forty to fifty segments setose, the last six 

 or eight segments often with two seta^ on each margin. Its tip is 

 armed with a double row of toothed spines (Plate LXIII, fig. 4), each 

 with a curved tip. 



Furcal plate with three strong claws (Plate LXV, fig. 3), the sec- 

 ond and third on special processes of the furcal plate, and from seven 

 to nine curved seta-like spines, these being mostly toothed and barbed 

 near tip (fig. 3). The base of each claw is armed with tw T o or three 

 rows of setae, mostly arranged in clusters. Claws very strongly 

 toothed, except near tip. Lower posterior margin of furcal plate very 

 densely setose. 



Observations. — The many collections of the United States Bureau 

 of Fisheries containing this form also contained many that were 

 evidently the young, and all showed various modifications of the 

 inner branch of the second antenna, but these in the main resembling 

 fig. 5. Inner rudimentary branch of the second antenna of the male 

 composed of two segments, the terminal one reflexed against the basal 

 one, thus forming a prehensile organ for grasping (fig. G). Basal 

 segment about four times as long as broad, inner margin swollen 

 about the middle, and with six short setae; terminal segment irregu- 

 larly falcate, with a seta near its union with the basal segment, and 

 a serrate tip (fig. 6a.) 



Remarks. — Muller, 1894, first describes this species as occurring in 

 the Mediterranean Sea in a depth of about 5 fathoms, among coarse 

 sand, in company with Amphioxus. He based his description on 

 but two examples, both of which were females, males being therefore 

 unknown to him. 



The males are seemingly not very abundant. Two males were found 

 among the twenty or more specimens critically examined by the 

 author. 



Distribution. — Mediterranean Sea (Muller, 1894) ; San Pedro, 

 California, Ace. No. 43766, U.S.N.M.; San Diego Bay, California, 

 Cat. No. 13791, U.S.X.M.; San Pedro, California, Ace. Xo. 37972, 

 U.S.X.M. ; off Abreojos Point, Lower California, 5J fathoms, station 

 2835, Albatross, and off San Diego, California, 25 fathoms, station 

 4304, Albatross; San Diego Bay, California, Cat. Xo. 13107, 

 U.S.N.M. ; Catalina Islands, California, and Ensenada, Lower Cali- 

 fornia, Ace. No. 22456, U.S.X.M. (Orcutt). 



The two males examined were from a collection taken at Ballenas 

 Bay, Lower California, U. S. Bureau of Fisheries, Xo. 1884 (Alba- 

 tross). 



