BY T. HARVEY JOHNSTON AND O. W. TIEGS. 121 



lumen containing a small amount of spongy tissue. In close connection with 

 these duets are a number of muscle fibres. The tubes extend forward as far as 

 the pharynx, increasing in size and becoming more infiltrated with spongy con- 

 nective tissue, then pass forward and downward to open by a number of minute 

 openings into the posterior portion of the vestibule which is surrounded by the 

 head lappets (PI. xxi., flg. 77). Posteriorly the longitudinal ducts can be traced 

 as far back as the end of the intestine. In the region of the phai-ynx the 

 excretory ducts give off a large spongy sinus-like extension over this structure, 

 thus forming a connection between the left and right tubes. DorsaJly to the 

 pharynx this connecting branch also receives two smaller ducts which run along 

 the dorsal surface above the intestine and immediately below the body-wall for 

 about half the length of the animal. 



Two pairs of eyes are present lying below the body-surface, immediately in 

 front of the pharynx. The anterior eyes are rather farther apart and somewhat 

 smaller than the posterior. Both pairs, however, are abnormally small and this 

 may account for their reported absence in the European species. Moreover, in 

 specimens which have been compressed, the granules of the eyes generally break 

 apart and this may further account for their not having been found previously 

 in this genus. 



The brain is very feebly developed and is visible in section simply as a 

 small mass of nervous tissue between and before the eyes. The lateral nerves 

 could not be observed. 



There is a large, very faintly lobed testis reaching back a.s far as the 

 posterior junction of the intestinal limbs. The vas deferens is given oft' from 

 it anteriorly in the median-ventral line, then passes to the left slightly and dilates 

 into a large vesicula seminalis, a second vesicle being formed a little further on. 

 The vas deferens continues thence as a narrow tube forwards, then backwards 

 to communicate with the cirrus. Into its most anterior portion opens the duct 

 from a very prominent prostate gland. The cirrus is a simple chitinous tube, 

 passing vertically downwards and giving off a second chitin-tube to the right 

 (PI. xxii., fig. 81). 



The strongly branched ovary lies well in front of the testis. The oviduct 

 passes almost vertically downward from it (PL xxii., flg. 81) after receiving the 

 yolk from an indistinct yolk-reservoir, then forward as a moderately distinct 

 tube, opening to the exterior close behind the male genital aperture. The shell- 

 glands appear to be merely glandular thickenings of the uterine walls. The egg 

 has not been found. The vitelline system is strongly developed and closely 

 follows the contour of the intestine, which it almost surrounds, appearing there- 

 fore, in side view, as a double-layered system. The transverse yolk-duct lies im- 

 mediately in front of the centre of the ovary and opens into the ootype just 

 before that structure bends down to continue forwards as the uterus. 



Pound on the gills of the marine jew-flsh, Sciaena antarctica Castelnau, from 

 Caloundra, South Queensland. 



Two other species of Calceostoma have already been recorded from marine 

 fishes, C. calceostom-a (Wagener) — usually known as C. elegans Ben. — and C. 

 inerme P'arona and Perugia, both from Europe. In these species eyes have not 

 been seen; if they are present, their minute size and the ease with which they 

 disintegi-ate may account for their not having been observed. The head-lappets 

 of C. glandulosum. are rather less prominent than those fignired for C. calceostoma. 

 A comparison of the hook apparatus with that of the known species is not pos- 

 sible, since the descriptions given indicate that certain of its components had 



