REPORT ON THE ENTOZOA. 
11 
9. Filaria paradise se, n. sp. (Pl. II. figs. 6, 7). 
From Paradisea apoda, Aru Islands, in the same tube as Filaria flabellata. 
There is only one specimen — a male, which measures 19 *2 mm. in length and 0'38 
mm. in breadth, the proportion of breadth and length being thus 1:52. The body is 
decidedly elongated, narrowing rapidly after the head. The latter bears two small round 
bps. The oesophagus occupies ^ of the entire length, and is 0-036 mm. in breadth ; the 
tail portion measures only of the whole. The cuticle is distantly wrinkled. The 
tail end is rolled up in a spiral, and is on that account very difficult to study. One 
cylindrical spicule (0-098 mm. long by 0'049 mm. broad) was visible ; a second was not 
to be found. The very end is conically rounded. I was not able to study exactly the 
nature of the papillae on the tail, since it was impossible to unroll the coil, or to place 
the object with the ventral surface directed upwards. Only this could be certainly 
demonstrated, that the above form is not identical with Filaria jlabellata . An exact 
diagnosis w r as impossible wuth such scanty material. 
10. Prothelmins profundissima, n. gen., n. sp. (PI. II. figs. 8-10). 
Specimen labelled: “3 March 1874. Depth 1950 fathoms.” 
The vessel contained two Nematodes, 58 and 65 mm. in length, 0*9 and 0'96 mm. in 
breadth respectively. The colour is yellowish, but the alimentary canal shines through 
as a blackish tract on the dorsal surface. Both extremities of the body are rounded, the 
posterior somewhat broader. The anus is situated 0 - 35 or 0"43 mm. from the tail end ; 
the latter occupies T -^- T of the entire length. The oesophagus measures in one specimen 
1*42 mm., the other 1‘62 mm., and thus occupies about ^ of the total length. Both 
head and tail ends are entirely devoid of papillae, or other normal characteristics. 
The cuticle is very firm and thick, measuring 0'084 mm. in transverse section, and 
consists of two systems of fibres crossing at an angle of 55°. The individual fibres are 
0'0025 mm. in breadth. The cuticle is covered externally by a hyaline epidermis, 0’0033 
mm. in thickness. 
Below the cuticle is a muscular layer, 0 - 02 mm. in breadth. It belongs to the 
Holomyarian type as defined by Schneider, and consists of longitudinal fibres, with an 
average breadth of 0"013 mm. Each fibre exhibits a row of vacuoles and a system of 
transverse striae. In transverse sections the fibres lie with the long diameter of then- 
spindle-shaped cross section disposed obliquely to the surface of the cuticle, and the 
vacuoles appear as dark median points. No interruption of the muscular sheath by 
lateral, dorsal, or ventral ridges was to be observed. 
The body-cavity is filled by the alimentary canal, which is attached to the dorsal 
