290 Mr. F. 8. Conant on Two new Cheetognaths. 
inwards and downwards to join a similar branch from the 
ovisperm duct of the opposite side, the two growing narrower 
as they approach, and finally fusing to form a small blind 
tube, directed anteriorly, on the mid-line underneath the 
intestine. 
The spermatic chambers of the caudal segment are without 
accessory longitudinal septa, but nevertheless show the peculiar 
circulation of the masses of developing spermatozoa. There 
is a transverse musculature in the anterior part of the body- 
segment, limited to the ventral half. The dorsal surface of 
the lateral fins and the adjoining surface of the body bear 
heavy masses of glandular cells. 
2. Sagitta hispida, sp. n. 
The form taken at Beaufort last year leads an active life 
on the surface and was an almost constant factor in the tow. 
The length of mature specimens varies from 7 to 11 millim. 
Fins 5: the anterior long and rather slender, the middle 
always broader than the anterior, both broadest in their poste- 
rior part. Caudal segment one third total length, The 
anterior fins extend from near the level of the abdominal 
ganglion to a point posterior to the centre of the total length. 
The middle are completely separated from them by a clear 
space, and are situated more on the caudal than on the body 
segment. Jaws 8 or 9. Anterior teeth 4 or 5. Posterior 
vary from 8 to 14 or 15. Corona ciliata extends from a 
point on the head anterior to the eyes along the dorsal mid- 
line almost to the level of the abdominal ganglion. Its 
outline is narrow and sinuous. The mature ovaries may 
extend beyond the anterior extremity of the anterior fins. 
The intestine has two well-marked lateral diverticula at its 
beginning. ‘The spermatic chambers of the caudal segment 
are divided by incomplete accessory longitudinal septa, about 
which the spermatic masses circulate. ‘The spermatic vesicles 
have a kind of cap such as described by Grassi for S, b7- 
punctata. 
The tactile prominences, with the sensory hairs springing 
from them, are especially numerous and manifest, and give 
the species the bristling appearance from which it is named. 
In the anterior part of the body they are arranged in some 
twelve more or less definite longitudinal rows. Each of the 
middle fins has a tactile prominence on its posterior third on 
both upper and lower surfaces, and the caudal has six on each 
surface, almost constantly, arranged as in the figure (fig. 2). 
S. hispida closely resembles S. bipunctata and S. minima, 
but differs too much to be classified with either, as a com- 
parison of Grassi’s description will show. 
