ON THE ANASPIDACEA, LIVING AND FOSSIL. 557 
A.tasmaniz! (Thomson 7). Plate I, fig. 1. 
The frontal margin of the head is produced into a conical 
projection, the sides and extremity of the cone being furnished 
with setz (text-fig.47). The eye-stalks do not project greatly 
beyond the lateral margins of the head. The body is carried 
flat and unflexed. On the head segment a median triangular 
piece is marked out by shallow grooves. The head segment 
is shghtly longer than the first thoracic segment. The first 
thoracic segment is distinguished by the presence of two 
lateral sulci. The succeeding segments of both thorax and 
TEXT-FIG. 47. 
LET, 
Anaspides tasmaniz. Head and eyes. 
abdomen are sub-equal in length, but the sixth abdominal 
segment is considerably longer. 
The first antenne have the three basal joints short and 
stout; the internal flagellum consists of about twenty 
segments. 
The otocyst is kidney-shaped. 
The second antenna has a short scale, not reaching the 
top of the second joint of the peduncle. 
The palp of the mandible is without an exopoditic lobe on 
its basal joint. The terminal segment is nearly half as long 
as the last but one. 
The first maxilla has a small palp and three sete near it. 
! In the description of the species, those characters which have been 
mentioned or described in the diagnoses of the genera or families or in 
the anatomical part are only lightly touched upon, or in some cases not 
mentioned, 
