NO. 1989. A8CIDIANS FROM NORTHEASTERN PACIFIC— RITTER. 461 



The following is a list of Albatross stations in Bering Sea at which 

 Boltenia ovifera was obtained: Station 3303, 33 fathoms; 3300, 15 

 fathoms; 3495, 56 fathoms; 3496, 41 fathoms; 3556, 49 fathoms; 

 3553, 51 fathoms; 3561, 48 fathoms; 3536, 40 fathoms; 3524, 36 

 fathoms; 3511, 39 fathoms; 3510, 27 fathoms; 3505, 44 fathoms; 

 3504, 34 fathoms; 3298, 20 fathoms; 3297, 26 fathoms; 3296, 24 

 fathoms; 3294, 30 fathoms; 3293, 30 fathoms; 3292, 32 fathoms; 

 3291, 26 fathoms; 3282, 53 fathoms; 3281, 36 fathoms; 3286, 37 

 fathoms; 3278, 47 fathoms; 3276, 18 fathoms; 3274, 19 fathoms; 

 3266, 24 fathoms; 3249, 13.5 fathoms; 3238, 18 fathoms. 



HARTMEYERIA, new genius. 

 Plate 33, figs. 8-13. 



Agreeing generally with Microcosmus , but: 



1. Body with a slender, rather long peduncle. 



2. Atrial tentacles, and a periatrial band quite similar to the 

 peripharyngeal band present. 



Type-species. — Hartmeyeria triangularis, new species. 



HARTMEYERIA TRIANGULARIS, new species. 



Superficial diaracteristics. — Body inclined to a triangular form, the 

 two orifices marking the basal angles, and the peduncle the third 

 angle; somewhat compressed laterally; the whole surface, excepting 

 the siphons, covered with a layer of black, closely adhering sand 

 grains. Test on the rather prominent siphons usually presenting a 

 series of regular, parallel, closely set ridges or folds, these with the 

 hght color of the test in this region as opposed to the covering of 

 black sand, setting the siphons off conspicuously from the rest of 

 the body. Greatest diameter of largest specimen, 14 mm. Length 

 of longest peduncle seen, 35 mm. Thickness of peduncle uniform and 

 scarcely more than 1 mm. in the thickest part, possessing a well- 

 defined coating of test to which the sand adheres as it does on the 

 body. Surface of test beset with fine short processes to which the 

 sand grains are attached; test itself thin and leatheiy. Mantle 

 thin, musculature sparse, but veiy regularly spaced (pi. 33, fig. 9), 

 circular bands more numerous than the radial, extendmg over the 

 whole body — not limited to the siphonal regions. Circular bands 

 external to the radial bands except on a portion of each siphon where 

 they are internal to the radials. 



Respiratory system. — Siphons rather prominent and distant from 

 each other, distinctly 4-lobed. Tentacles, brancliial, 20 to 35, of 

 different sizes, branched laiobs, quite irregular in arrangement. 

 Hypophysis mouth horseshoe-shaped, the horns nearly touching 

 each other, maldng the whole almost a circle. Peripharyngeal band 

 unusually broad ; an epithehal fold, p. g' . (pi. 33, fig. 1 1) or velum \\dtliin 

 the peripharyngeal field some distance from the inner hp of the peri- 



