FISHERY BULLETIN: VOL. 72, NO. 1 



between the shallow swelling in the proximal 

 lateral corner and the distal margin, and the 

 distance between the proximal medial corner 

 and the tip of the large lateral prong (Figure 2i). 

 Types and reference specimeins have been 

 deposited with the Smithsonian Institution, 

 U.S. National Museum, Washington, D.C. 



GENUS PONT ELLIN A DANA 



Pontella Dana, 1846 (in part), p. 184, type not 

 designated; Dana, 1849, p. 26. type not 

 designated. 



Pontellina Dana, 1853 (in part), p. 1135, type 

 not designated; Giesbrecht, 1889, j). 29, 

 type by monotypy, PoiitelUiia plumata 

 (Dana); Giesbrecht, 1892, p. 73, 497; 

 Giesbrecht and Schmeil, 1898, p. 149. 



Calanops Claus, 1863, p. 211, type by mono- 

 iy^y, CahiHopsi messineyisis C\a.\x% = Pontel- 

 lina plumata (Dana), Giesbrecht, 1889, p. 

 29. 



Pseudopo)itia Claus, 1892, p. 861, 864, type by 

 monotypy, Psendopoutia plumata (Dana) 

 = Pseudopontella plumata (Dana), Claus, 

 1893, p. 278. 



Pseudopo)itella Claus, 1893, p. 278, type by 

 monotypy, Pseadopoiitilla plumata (Dana) 

 = Pontellina plumata (Dana), Giesbrecht 

 and Schmeil, 1898. p. 149. 



Not Pontellina Claus, 1892. p. 851; 1893. p. 272. 



Diagnosis 



Relatively small pontellids, less than 2 mm 

 in TL. Prosome in dorsal view broadly oval, 

 less than twice as long as maximum width; 

 forehead lacking headhooks; ThIV-V corners 

 symmetrical; rostrum proximally protuberant, 

 bifurcate at base, and extending ventrad as 

 slender, elongate, flexible filaments; in lateral 

 view, filaments more than 10 times longer than 

 wide at maximum width; ventral eye present 

 but inconspicuous, scarcely produced, and lack- 

 ing a distinctive lens. In Al (except sexually 

 modified right Al of male) segments 13. 14, and 

 15 separate and about equal in length. A2 with 

 Re about as long as Ril, length of Ril less than 

 4 times maximum width. 



Female lacking distinctive dorsal lenses in 

 forehead. Furcal rami weakly asymmetrical, 

 right ramus fused to anal segment. P5 with 

 monomerous Re bearing 1 lateral and 3 terminal 

 setae, in addition to one medial setiform process 

 fused to Re and serrated along medial margin; 



Ri monomerous and terminating in one or two 

 apical spines. A2 and mandible (Mnd) with 

 elongate setae reaching beyond thorax when 

 extended i)osteriad. 



Male with one j^air of dorsal lenses in fore- 

 head. 



Additional Description 



Both sexes with cephalic groove and agree- 

 ing in meristic features of all ai:)pendages except 

 for those modified by sexual maturation. Non- 

 sexually modified appendages agree with those 

 of Pontellina plumata as shown by Giesbrecht 

 (1892, pi. 25, fig. 1, 6, 7, 9, 12-14, 18, 20, 21, 23- 

 25). Segmentation, setation, and spination of 

 nonsexually influenced appendages are virtually 

 identical among the four species and, except 

 for Al, closely resemble those of Pontellopsis. 

 They are as follows: 



Al: 17 free segments; segments 2-5, 6-8, 



24-25 fused, 9-11 partly fused. 

 A2: 2 basal segments; Re: 3 segments 

 with 1. 4, 3 setae, respectively; Ri: 

 2 segments; Le: 6, Li: 6 + 2 setae. 

 Mnd: palpus 1 seta; Re: 5 segments with a 

 total of 6 setae; Ri: 2 segments 

 with 4 and 6 setae, respectively. 

 Mxl: Lil: 14 spines; Li2: 3 spinelike setae; 

 Li3: small, 3 setae; B2: 3 + 2 

 setae; Ri: 4 + 1 setae; Re: 8 setae; 

 Le: 1-1-8 setae. 

 Mx2: lobe 1:3 + 1 setae; lobes 2-5: 2 + 1 



setae each; Ri: 6 -H 1 setae. 

 Mxp: 5-segmented, fingered lobe on Bl with 



2, 2. 3 setae. 

 PI: trimerous Re: 1. 1. 4 Si; 1 St; 1, 1, 



2 Se; trimerous Ri: 1, 2. 4 Se; 

 1 St; 0, 0, 1 Se. 



P2 and P3: trimerous Re: 1, 1, 5 Si; 1 St; 



1, 1, 3 Se; bimerous Ri: 3, 5, Si; 



ISt; 0. 2Se. 

 P4: trimerous Re: 1, 1, 5 Si; 1 St; 1, 1, 



3 Se; bimerous Ri: 3, 4 Si; 1 St; 

 0, 2Se. 



Se of PI smooth; Se of Rel and Re2 of P2 

 with toothed medial margin; Se of 

 Re3 with toothed medial and lateral 

 margins; in Se of P3 and P4 also 

 both margins toothed. 



St of Re 3 of PI to 4 with toothed lateral 

 margin. 



Bl of PI to 4 with 1 Si; B2 ususally without 

 setae. 



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