REPORT ON THE NUDIBR AN CHIATA. 
55 
in size (figs. 11, b, 12, 13, 14, a), with a shorter basal portion and a shorter broader hook. 
The outer lateral tooth is larger, and has a much stronger hook, with an obliquely 
truncated posterior extremity (figs. 11, c, 14, b, 15, a, a). Of the two outer teeth one (figs. 
11, d, 15, b, 16, a, 17), the inner one, was considerably larger and broader than the other ; it 
measured about ’04 mm. high ; on the inside it was higher, and slanted outwards. The 
outer tooth was shorter, narrower, and lower, coming to a point behind ; on the inside it 
was lower (figs. 11, e, 16). 
The white salivary glands were long, but thin ; the efferent ducts short. 
The oesophagus is rather narrow, about half as long again as the bulbus, and opens 
into the stomach , which is nearly spherical, and measures about 3 mm. in diameter ; its 
colour is grey, and it lies partly in the wide cleft of the liver. The gut is thin, and breaks 
through the left side of the liver in a deep furrow ; it forms a large arch in front of the 
liver and extends backwards (fig. 9, 22, a) to the anal papilla, measuring about 8 mm. 
long, and its interior shows fine longitudinal folds. The contents of the stomach were 
Siphonophores, Hydroids, Foraminifera, and some of the stomachal teeth of the animal 
itself. 
The liver is anteriorly truncated, somewhat cup-shaped, on account of the broad and 
deep cleft for the reception of the stomach, and measures 4'5 mm. in breadth and length, 
and 3 ‘5 mm. in height ; the posterior extremity is rounded ; the colour is brownish ; it 
is smooth, with the exception of a few deep furrows in front ; its cavity is rather wide. 
The pear-shaped gall bladder is large, appearing as a large facet behind the stomach on 
the upper surface of the liver, about 2 mm. high. 
The heart has the usual structure. The small yellowish-white flattened, oval blood- 
gland lies behind the central nervous system. — The urethra (fig. 22, b) has a length of 
fully 2 ’5 mm., and is attached to the rectum ; with the urethra is connected, by a lateral 
tube, the renal syrinx (fig. 22, d). 
The hermaphrodite gland appeared, so far as could be made out, not to cover the 
liver, but was found underneath in front of the liver as a long, strong, yellowish mass ; 
the lobules contained no developed sexual products.— The anterior genital mass was 
but slightly developed, about 3 mm. long. The prostate was small ; the vas deferens 
was not long, nor very thin, forming a single loop, and then passing into the penis. This 
latter organ in the individual, which I examined, was retracted. The armature (fig. 18) 
of the anterior part of the vas deferens was '5 mm. in length. The spines (figs. 18-20) 
were arranged in some ten or twelve longitudinal series, in each series nearly twenty to 
twenty-five ; their colour was a clear yellow ; the hindermost were about , 007- , 009 mm. 
high, the most anterior '04 mm. ; the hindermost were tubercle-shaped (fig. 20), and 
then gradually increasing in height ; the anterior ones were generally straight, but also 
curved and of irregular form (fig. 18). The spermatheca was spherical, the spermatocyst 
sac-like. The mucous gland was whitish in colour. 
