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BULLETIN OF THE UNITED STATES FISH COMMISSION. 
Class I. CALCAREA Bowerbank. 
Order HETEROC(ELA Polejaeff. 
With flagellated chambers, remaining parts of inner surface covered with pavement epithelium. 
Family LEUCONIDAt (LEUCONES) Hackel. 
The usually round flagellated chambers communicate with the central cavity by means of exlialent 
canals. Spicules irregularly scattered. 
Genus PERICHARAX Polejaeff (1883). 
With distinct subdermal cavities. 
Pericharax carteri var. homoraphis, Polejaeff. 
Pericharax carteri var. homoraphis, Polejaeff, 1883, p. 6, pi. II, fig. 5; pi. vii, fig. 8. 
Station 6090, seven specimens; station ?, two specinlens. 
Sizes range from a greatest length of 25 mm. to one of 10 mm. Variety of shape exhibited is 
interesting. A tubular or vase-like shape, expanded above, tapering below into peduncle-like portion, 
and with a single terminal osculum, is represented. The vase may be very low and wide; may be 
especially expanded above, and furnished with two oscula at the upper end; or the body may be of a 
massive, somewhat flattened character, with an osculum on upper surface and another at the margin. 
In a specimen of the massive shape one surface is convex, the other concave, with the appearance of 
having been attached; one osculum at the margin. 
Color . — Specimens from station 6090, a fairly dark brown; those from station ?, very light brown. 
Skeleton. — (1) Regular gastric quadriradiate spicules; facial rays straight, smooth, sharp-pointed, 
about 150 /t long; apical ray, sharp-pointed, straight or curved, often irregularly bent, sometimes 
rudimentary, usually 200 to 250 p long. (2) Triradiate spicules of parenchyma differing from quadri- 
radiates only in absence of fourth ray.- Among them are scattered very large (similar) triradiates 
with rays sometimes exceeding 1 mm. in length; connected with smaller triradiates by intermediate 
stages. (3) Dermal and subdermal triradiate spicules, similar to the smaller triradiates of parenchyma 
(in var. heteroraphis becoming sagittal and irregular). 
Class II. NON-CALCAREA Vosmaer. 
Subclass I. TRIAXONIA F. E. Schulze. 
Order HEXACTINEUIDA 0. Schmidt. 
With silicious spicules belonging to the triaxial type, or readily derivable from it. 
Family MtEANDROSPONGID J Zittel. 
Dictyonine hexactinellida (i. e. , having the large parenchymal hexacts united in a firmly connected 
framework) . Body consists of a connected system of labyrinthine anastomosing tubes, between which 
there is a connected interstitial system of intercanals. 
Genus MARGARITELLA 0. Schmidt (1880). 
With the single species. 
Margaritella coeloptychioides O. Schmidt. 
Margaritella coeloptychioides, Schmidt, 1880, ]>. 51, pi. vii, fig. 7. 
Margaritella coeloptychioides, Schulze, 1887, p. 351, pi. ci, figs. 3-8. 
Station 6056, nine fragments, all flattened pieces about 10 mm. thick, the largest 60 mm. wide. 
Only fragments have been seen. From these O. Schmidt inferred that the body has a shallow 
cup-like form. The intercanals are commonly of a cylindrical shape, but externally are more or less 
united so as to give rise to the mieandri form furrows seen on outer surface of the sponge. The furrows 
or separate intercanals are covered in by a delicate dermal membrane perforated by pores and 
